id	sid	tid	token	lemma	pos
esrj-31427	1	1	geotisica	geotisica	PROPN
esrj-31427	1	2	colombiana	colombiana	PROPN
esrj-31427	1	3	pp.71	pp.71	PROPN
esrj-31427	1	4	-	-	PROPN
esrj-31427	1	5	73	73	NUM
esrj-31427	1	6	bogota	bogota	NOUN
esrj-31427	1	7	,	,	PUNCT
esrj-31427	1	8	d.c.n	d.c.n	NOUN
esrj-31427	1	9	°	°	ADP
esrj-31427	1	10	7	7	NUM
esrj-31427	1	11	dieiembre	dieiembre	NOUN
esrj-31427	1	12	de	de	X
esrj-31427	1	13	2003	2003	NUM
esrj-31427	1	14	issn	issn	PROPN
esrj-31427	1	15	0121	0121	NUM
esrj-31427	1	16	2974	2974	NUM
esrj-31427	1	17	true	true	ADJ
esrj-31427	1	18	amplitude	amplitude	NOUN
esrj-31427	1	19	migration	migration	NOUN
esrj-31427	1	20	in	in	ADP
esrj-31427	1	21	constant	constant	ADJ
esrj-31427	1	22	gradient	gradient	NOUN
esrj-31427	1	23	velocity	velocity	NOUN
esrj-31427	1	24	media	medium	NOUN
esrj-31427	1	25	luis	luis	PROPN
esrj-31427	1	26	antonio	antonio	PROPN
esrj-31427	1	27	castillo	castillo	PROPN
esrj-31427	1	28	lopez	lopez	PROPN
esrj-31427	1	29	protesor	protesor	PROPN
esrj-31427	1	30	asistente	asistente	PROPN
esrj-31427	1	31	universidad	universidad	PROPN
esrj-31427	1	32	nacional	nacional	PROPN
esrj-31427	1	33	de	de	X
esrj-31427	1	34	colombia	colombia	PROPN
esrj-31427	1	35	,	,	PUNCT
esrj-31427	1	36	curso	curso	PROPN
esrj-31427	1	37	posgrado	posgrado	PROPN
esrj-31427	1	38	de	de	PROPN
esrj-31427	1	39	geofisica	geofisica	PROPN
esrj-31427	1	40	tacultad	tacultad	PROPN
esrj-31427	1	41	de	de	PROPN
esrj-31427	1	42	ciencias	ciencias	PROPN
esrj-31427	1	43	.	.	PUNCT
esrj-31427	2	1	departamento	departamento	PROPN
esrj-31427	2	2	de	de	PROPN
esrj-31427	2	3	geociencias	geociencias	PROPN
esrj-31427	2	4	,	,	PUNCT
esrj-31427	2	5	grupo	grupo	X
esrj-31427	2	6	de	de	X
esrj-31427	2	7	investigaci6n	investigaci6n	PROPN
esrj-31427	2	8	en	en	ADP
esrj-31427	2	9	geofisica	geofisica	PROPN
esrj-31427	2	10	e	e	PROPN
esrj-31427	2	11	-	-	NOUN
esrj-31427	2	12	mail	mail	NOUN
esrj-31427	2	13	:	:	PUNCT
esrj-31427	2	14	lacastillol@unal.edu.co	lacastillol@unal.edu.co	ADJ
esrj-31427	2	15	resumen	resuman	NOUN
esrj-31427	2	16	ei	ei	X
esrj-31427	2	17	algoritmo	algoritmo	PROPN
esrj-31427	2	18	de	de	PROPN
esrj-31427	2	19	kirchhoff	kirchhoff	PROPN
esrj-31427	2	20	con	con	PROPN
esrj-31427	2	21	trazado	trazado	PROPN
esrj-31427	2	22	de	de	X
esrj-31427	2	23	rayo	rayo	PROPN
esrj-31427	2	24	se	se	X
esrj-31427	2	25	basa	basa	PROPN
esrj-31427	2	26	en	en	PROPN
esrj-31427	2	27	una	una	PROPN
esrj-31427	2	28	funcion	funcion	PROPN
esrj-31427	2	29	de	de	X
esrj-31427	2	30	velocidad	velocidad	PROPN
esrj-31427	2	31	con	con	PROPN
esrj-31427	2	32	stante	stante	PROPN
esrj-31427	2	33	.	.	PUNCT
esrj-31427	3	1	esta	esta	PROPN
esrj-31427	3	2	solucion	solucion	PROPN
esrj-31427	3	3	incorpora	incorpora	PROPN
esrj-31427	3	4	informacion	informacion	PROPN
esrj-31427	3	5	de	de	PROPN
esrj-31427	3	6	trayectoria	trayectoria	X
esrj-31427	3	7	de	de	X
esrj-31427	3	8	rayos	rayos	X
esrj-31427	3	9	dentro	dentro	X
esrj-31427	3	10	del	del	X
esrj-31427	3	11	algoritmo	algoritmo	PROPN
esrj-31427	3	12	,	,	PUNCT
esrj-31427	3	13	el	el	PROPN
esrj-31427	3	14	cual	cual	PROPN
esrj-31427	3	15	puede	puede	PROPN
esrj-31427	3	16	extenderse	extenderse	VERB
esrj-31427	3	17	a	a	DET
esrj-31427	3	18	un	un	PROPN
esrj-31427	3	19	medio	medio	PROPN
esrj-31427	3	20	de	de	PROPN
esrj-31427	3	21	velocidad	velocidad	PROPN
esrj-31427	3	22	variable	variable	PROPN
esrj-31427	3	23	.	.	PUNCT
esrj-31427	4	1	el	el	PROPN
esrj-31427	4	2	modelo	modelo	PROPN
esrj-31427	4	3	de	de	PROPN
esrj-31427	4	4	veloci	veloci	PROPN
esrj-31427	4	5	dad	dad	PROPN
esrj-31427	4	6	incluye	incluye	PROPN
esrj-31427	4	7	la	la	PROPN
esrj-31427	4	8	localizacion	localizacion	PROPN
esrj-31427	4	9	de	de	ADP
esrj-31427	4	10	reflectores	reflectore	NOUN
esrj-31427	4	11	e	e	NOUN
esrj-31427	4	12	interval	interval	NOUN
esrj-31427	4	13	os	os	PROPN
esrj-31427	4	14	de	de	X
esrj-31427	4	15	velocidades	velocidades	PROPN
esrj-31427	4	16	entre	entre	PROPN
esrj-31427	4	17	dos	dos	PROPN
esrj-31427	4	18	reflectores	reflectores	PROPN
esrj-31427	4	19	adyacentes	adyacente	NOUN
esrj-31427	4	20	,	,	PUNCT
esrj-31427	4	21	generados	generado	NOUN
esrj-31427	4	22	a	a	DET
esrj-31427	4	23	traves	trave	NOUN
esrj-31427	4	24	del	del	X
esrj-31427	4	25	analisis	analisis	PROPN
esrj-31427	4	26	de	de	X
esrj-31427	4	27	velocidad	velocidad	PROPN
esrj-31427	4	28	,	,	PUNCT
esrj-31427	4	29	pero	pero	PROPN
esrj-31427	4	30	importante	importante	PROPN
esrj-31427	4	31	en	en	PROPN
esrj-31427	4	32	el	el	PROPN
esrj-31427	4	33	procesamiento	procesamiento	PROPN
esrj-31427	4	34	sismico	sismico	PROPN
esrj-31427	4	35	tradicional	tradicional	PROPN
esrj-31427	4	36	.	.	PUNCT
esrj-31427	5	1	este	este	PROPN
esrj-31427	5	2	proceso	proceso	PROPN
esrj-31427	5	3	puede	puede	NOUN
esrj-31427	5	4	alcanzarse	alcanzarse	NOUN
esrj-31427	5	5	al	al	PROPN
esrj-31427	5	6	aplicar	aplicar	PROPN
esrj-31427	5	7	un	un	PROPN
esrj-31427	5	8	operador	operador	PROPN
esrj-31427	5	9	de	de	X
esrj-31427	5	10	funcion	funcion	NOUN
esrj-31427	5	11	peso	peso	X
esrj-31427	5	12	de	de	X
esrj-31427	5	13	apilado	apilado	NOUN
esrj-31427	5	14	por	por	NOUN
esrj-31427	5	15	difraccion	difraccion	NOUN
esrj-31427	5	16	,	,	PUNCT
esrj-31427	5	17	cuyo	cuyo	PROPN
esrj-31427	5	18	desarrollo	desarrollo	PROPN
esrj-31427	5	19	teorico	teorico	PROPN
esrj-31427	5	20	se	se	PROPN
esrj-31427	5	21	bas	bas	PROPN
esrj-31427	5	22	a	a	X
esrj-31427	5	23	en	en	X
esrj-31427	5	24	la	la	X
esrj-31427	5	25	integral	integral	ADJ
esrj-31427	5	26	de	de	ADP
esrj-31427	5	27	migraci6n	migraci6n	PROPN
esrj-31427	5	28	tipo	tipo	PROPN
esrj-31427	5	29	kirchhoff	kirchhoff	PROPN
esrj-31427	5	30	.	.	PUNCT
esrj-31427	6	1	al	al	PROPN
esrj-31427	6	2	escoger	escoger	PROPN
esrj-31427	6	3	el	el	PROPN
esrj-31427	6	4	propio	propio	PROPN
esrj-31427	6	5	peso	peso	NOUN
esrj-31427	6	6	para	para	PROPN
esrj-31427	6	7	el	el	PROPN
esrj-31427	6	8	peso	peso	PROPN
esrj-31427	6	9	de	de	X
esrj-31427	6	10	apilado	apilado	X
esrj-31427	6	11	de	de	X
esrj-31427	6	12	datos	datos	X
esrj-31427	6	13	,	,	PUNCT
esrj-31427	6	14	el	el	PROPN
esrj-31427	6	15	resultado	resultado	VERB
esrj-31427	6	16	del	del	PROPN
esrj-31427	6	17	proceso	proceso	NOUN
esrj-31427	6	18	de	de	ADP
esrj-31427	6	19	migraci6n	migraci6n	PROPN
esrj-31427	6	20	es	es	PROPN
esrj-31427	6	21	una	una	PROPN
esrj-31427	6	22	seccion	seccion	PROPN
esrj-31427	6	23	sismica	sismica	PROPN
esrj-31427	6	24	donde	donde	PROPN
esrj-31427	6	25	se	se	PROPN
esrj-31427	6	26	recupera	recupera	PROPN
esrj-31427	6	27	la	la	PROPN
esrj-31427	6	28	amplitud	amplitud	PROPN
esrj-31427	6	29	y	y	PROPN
esrj-31427	6	30	su	su	PROPN
esrj-31427	6	31	valor	valor	PROPN
esrj-31427	6	32	es	es	PROPN
esrj-31427	6	33	proporcional	proporcional	PROPN
esrj-31427	6	34	al	al	PROPN
esrj-31427	6	35	coeficiente	coeficiente	PROPN
esrj-31427	6	36	de	de	PROPN
esrj-31427	6	37	reflexion	reflexion	PROPN
esrj-31427	6	38	,	,	PUNCT
esrj-31427	6	39	liamado	liamado	NOUN
esrj-31427	6	40	rnigracion	rnigracion	NOUN
esrj-31427	6	41	con	con	PROPN
esrj-31427	6	42	amplitudes	amplitude	NOUN
esrj-31427	6	43	verdaderas	verdaderas	NOUN
esrj-31427	6	44	(	(	PUNCT
esrj-31427	6	45	recuperacion	recuperacion	NOUN
esrj-31427	6	46	de	de	X
esrj-31427	6	47	amplitudes	amplitude	NOUN
esrj-31427	6	48	verdaderas	verdadera	NOUN
esrj-31427	6	49	)	)	PUNCT
esrj-31427	6	50	.	.	PUNCT
esrj-31427	7	1	palabras	palabras	PROPN
esrj-31427	7	2	clave	clave	PROPN
esrj-31427	7	3	:	:	PUNCT
esrj-31427	7	4	recuperacion	recuperacion	NOUN
esrj-31427	7	5	de	de	ADP
esrj-31427	7	6	amplitudes	amplitudes	PROPN
esrj-31427	7	7	verdaderes	verdadere	NOUN
esrj-31427	7	8	,	,	PUNCT
esrj-31427	7	9	psdm	psdm	PROPN
esrj-31427	7	10	,	,	PUNCT
esrj-31427	7	11	medid	medid	VERB
esrj-31427	7	12	con	con	PROPN
esrj-31427	7	13	gradiente	gradiente	PROPN
esrj-31427	7	14	de	de	X
esrj-31427	7	15	velocidad	velocidad	PROPN
esrj-31427	7	16	.	.	PUNCT
esrj-31427	8	1	abstract	abstract	ADJ
esrj-31427	8	2	the	the	DET
esrj-31427	8	3	kirchhoff	kirchhoff	NOUN
esrj-31427	8	4	conventional	conventional	ADJ
esrj-31427	8	5	algorithm	algorithm	NOUN
esrj-31427	8	6	using	use	VERB
esrj-31427	8	7	ray	ray	NOUN
esrj-31427	8	8	tracing	tracing	NOUN
esrj-31427	8	9	is	be	AUX
esrj-31427	8	10	based	base	VERB
esrj-31427	8	11	on	on	ADP
esrj-31427	8	12	a	a	DET
esrj-31427	8	13	constant	constant	ADJ
esrj-31427	8	14	velocity	velocity	NOUN
esrj-31427	8	15	function	function	NOUN
esrj-31427	8	16	.	.	PUNCT
esrj-31427	9	1	this	this	DET
esrj-31427	9	2	solution	solution	NOUN
esrj-31427	9	3	,	,	PUNCT
esrj-31427	9	4	where	where	SCONJ
esrj-31427	9	5	is	be	AUX
esrj-31427	9	6	incorporated	incorporate	VERB
esrj-31427	9	7	ray	ray	NOUN
esrj-31427	9	8	path	path	NOUN
esrj-31427	9	9	information	information	NOUN
esrj-31427	9	10	into	into	ADP
esrj-31427	9	11	conventional	conventional	ADJ
esrj-31427	9	12	algorithm	algorithm	NOUN
esrj-31427	9	13	,	,	PUNCT
esrj-31427	9	14	can	can	AUX
esrj-31427	9	15	be	be	AUX
esrj-31427	9	16	extended	extend	VERB
esrj-31427	9	17	to	to	ADP
esrj-31427	9	18	a	a	DET
esrj-31427	9	19	variable	variable	ADJ
esrj-31427	9	20	velocity	velocity	NOUN
esrj-31427	9	21	medium	medium	NOUN
esrj-31427	9	22	.	.	PUNCT
esrj-31427	10	1	velocity	velocity	NOUN
esrj-31427	10	2	models	model	NOUN
esrj-31427	10	3	include	include	VERB
esrj-31427	10	4	the	the	DET
esrj-31427	10	5	locations	location	NOUN
esrj-31427	10	6	of	of	ADP
esrj-31427	10	7	reflectors	reflector	NOUN
esrj-31427	10	8	and	and	CCONJ
esrj-31427	10	9	interval	interval	NOUN
esrj-31427	10	10	of	of	ADP
esrj-31427	10	11	velocities	velocity	NOUN
esrj-31427	10	12	between	between	ADP
esrj-31427	10	13	any	any	DET
esrj-31427	10	14	two	two	NUM
esrj-31427	10	15	adjacents	adjacent	NOUN
esrj-31427	10	16	reflectors	reflector	NOUN
esrj-31427	10	17	that	that	PRON
esrj-31427	10	18	are	be	AUX
esrj-31427	10	19	generally	generally	ADV
esrj-31427	10	20	generated	generate	VERB
esrj-31427	10	21	through	through	ADP
esrj-31427	10	22	the	the	DET
esrj-31427	10	23	velocity	velocity	NOUN
esrj-31427	10	24	analyses	analysis	NOUN
esrj-31427	10	25	,	,	PUNCT
esrj-31427	10	26	process	process	NOUN
esrj-31427	10	27	important	important	ADJ
esrj-31427	10	28	in	in	ADP
esrj-31427	10	29	traditional	traditional	ADJ
esrj-31427	10	30	seismic	seismic	ADJ
esrj-31427	10	31	processing	processing	NOUN
esrj-31427	10	32	.	.	PUNCT
esrj-31427	11	1	this	this	DET
esrj-31427	11	2	process	process	NOUN
esrj-31427	11	3	could	could	AUX
esrj-31427	11	4	be	be	AUX
esrj-31427	11	5	achieved	achieve	VERB
esrj-31427	11	6	by	by	ADP
esrj-31427	11	7	applying	apply	VERB
esrj-31427	11	8	a	a	DET
esrj-31427	11	9	weighted	weight	VERB
esrj-31427	11	10	diffraction	diffraction	NOUN
esrj-31427	11	11	stack	stack	NOUN
esrj-31427	11	12	operator	operator	NOUN
esrj-31427	11	13	,	,	PUNCT
esrj-31427	11	14	which	which	PRON
esrj-31427	11	15	theoretical	theoretical	ADJ
esrj-31427	11	16	development	development	NOUN
esrj-31427	11	17	is	be	AUX
esrj-31427	11	18	based	base	VERB
esrj-31427	11	19	on	on	ADP
esrj-31427	11	20	a	a	DET
esrj-31427	11	21	kirchhoff	kirchhoff	NOUN
esrj-31427	11	22	type	type	NOUN
esrj-31427	11	23	migration	migration	NOUN
esrj-31427	11	24	integral	integral	ADJ
esrj-31427	11	25	.	.	PUNCT
esrj-31427	12	1	by	by	ADP
esrj-31427	12	2	choosing	choose	VERB
esrj-31427	12	3	the	the	DET
esrj-31427	12	4	proper	proper	ADJ
esrj-31427	12	5	weight	weight	NOUN
esrj-31427	12	6	for	for	ADP
esrj-31427	12	7	stacking	stack	VERB
esrj-31427	12	8	the	the	DET
esrj-31427	12	9	data	datum	NOUN
esrj-31427	12	10	,	,	PUNCT
esrj-31427	12	11	the	the	DET
esrj-31427	12	12	result	result	NOUN
esrj-31427	12	13	of	of	ADP
esrj-31427	12	14	the	the	DET
esrj-31427	12	15	migration	migration	NOUN
esrj-31427	12	16	process	process	NOUN
esrj-31427	12	17	is	be	AUX
esrj-31427	12	18	a	a	DET
esrj-31427	12	19	seismic	seismic	ADJ
esrj-31427	12	20	section	section	NOUN
esrj-31427	12	21	where	where	SCONJ
esrj-31427	12	22	the	the	DET
esrj-31427	12	23	amplitude	amplitude	NOUN
esrj-31427	12	24	are	be	AUX
esrj-31427	12	25	recovered	recover	VERB
esrj-31427	12	26	and	and	CCONJ
esrj-31427	12	27	its	its	PRON
esrj-31427	12	28	value	value	NOUN
esrj-31427	12	29	are	be	AUX
esrj-31427	12	30	proportional	proportional	ADJ
esrj-31427	12	31	to	to	ADP
esrj-31427	12	32	the	the	DET
esrj-31427	12	33	reflection	reflection	NOUN
esrj-31427	12	34	coefficient	coefficient	NOUN
esrj-31427	12	35	,	,	PUNCT
esrj-31427	12	36	the	the	DET
esrj-31427	12	37	so	so	ADV
esrj-31427	12	38	-	-	PUNCT
esrj-31427	12	39	called	call	VERB
esrj-31427	12	40	true	true	ADJ
esrj-31427	12	41	-	-	PUNCT
esrj-31427	12	42	amplitude	amplitude	NOUN
esrj-31427	12	43	migration	migration	NOUN
esrj-31427	12	44	(	(	PUNCT
esrj-31427	12	45	true	true	ADJ
esrj-31427	12	46	ampiltude	ampiltude	NOUN
esrj-31427	12	47	recovering	recovering	NOUN
esrj-31427	12	48	)	)	PUNCT
esrj-31427	12	49	.	.	PUNCT
esrj-31427	13	1	migration	migration	NOUN
esrj-31427	13	2	process	process	NOUN
esrj-31427	13	3	was	be	AUX
esrj-31427	13	4	applied	apply	VERB
esrj-31427	13	5	into	into	ADP
esrj-31427	13	6	different	different	ADJ
esrj-31427	13	7	models	model	NOUN
esrj-31427	13	8	.	.	PUNCT
esrj-31427	14	1	the	the	DET
esrj-31427	14	2	objetive	objetive	NOUN
esrj-31427	14	3	is	be	AUX
esrj-31427	14	4	to	to	PART
esrj-31427	14	5	reproduce	reproduce	VERB
esrj-31427	14	6	an	an	DET
esrj-31427	14	7	accurate	accurate	ADJ
esrj-31427	14	8	picture	picture	NOUN
esrj-31427	14	9	of	of	ADP
esrj-31427	14	10	the	the	DET
esrj-31427	14	11	subsurface	subsurface	NOUN
esrj-31427	14	12	model	model	NOUN
esrj-31427	14	13	from	from	ADP
esrj-31427	14	14	the	the	DET
esrj-31427	14	15	data	datum	NOUN
esrj-31427	14	16	registered	register	VERB
esrj-31427	14	17	in	in	ADP
esrj-31427	14	18	areas	area	NOUN
esrj-31427	14	19	where	where	SCONJ
esrj-31427	14	20	the	the	DET
esrj-31427	14	21	velocity	velocity	NOUN
esrj-31427	14	22	changes	change	VERB
esrj-31427	14	23	.	.	PUNCT
esrj-31427	15	1	the	the	DET
esrj-31427	15	2	migration	migration	NOUN
esrj-31427	15	3	process	process	NOUN
esrj-31427	15	4	was	be	AUX
esrj-31427	15	5	obtained	obtain	VERB
esrj-31427	15	6	after	after	ADP
esrj-31427	15	7	trying	try	VERB
esrj-31427	15	8	several	several	ADJ
esrj-31427	15	9	testes	testis	NOUN
esrj-31427	15	10	made	make	VERB
esrj-31427	15	11	with	with	ADP
esrj-31427	15	12	different	different	ADJ
esrj-31427	15	13	weigths	weigth	NOUN
esrj-31427	15	14	.	.	PUNCT
esrj-31427	16	1	key	key	ADJ
esrj-31427	16	2	words	word	NOUN
esrj-31427	16	3	:	:	PUNCT
esrj-31427	16	4	true	true	ADJ
esrj-31427	16	5	amplitude	amplitude	NOUN
esrj-31427	16	6	recovery	recovery	NOUN
esrj-31427	16	7	,	,	PUNCT
esrj-31427	16	8	psdm	psdm	PROPN
esrj-31427	16	9	.	.	PUNCT
esrj-31427	17	1	gradient	gradient	ADJ
esrj-31427	17	2	velocity	velocity	NOUN
esrj-31427	17	3	media	medium	NOUN
esrj-31427	17	4	introduction	introduction	NOUN
esrj-31427	17	5	by	by	ADP
esrj-31427	17	6	incorporating	incorporate	VERB
esrj-31427	17	7	ray	ray	NOUN
esrj-31427	17	8	path	path	NOUN
esrj-31427	17	9	information	information	NOUN
esrj-31427	17	10	into	into	ADP
esrj-31427	17	11	conventional	conventional	ADJ
esrj-31427	17	12	migration	migration	NOUN
esrj-31427	17	13	algoritm	algoritm	NOUN
esrj-31427	17	14	,	,	PUNCT
esrj-31427	17	15	the	the	DET
esrj-31427	17	16	solution	solution	NOUN
esrj-31427	17	17	can	can	AUX
esrj-31427	17	18	be	be	AUX
esrj-31427	17	19	extended	extend	VERB
esrj-31427	17	20	to	to	ADP
esrj-31427	17	21	variable	variable	ADJ
esrj-31427	17	22	velocity	velocity	NOUN
esrj-31427	17	23	medium	medium	NOUN
esrj-31427	17	24	.	.	PUNCT
esrj-31427	18	1	the	the	DET
esrj-31427	18	2	rays	ray	NOUN
esrj-31427	18	3	are	be	AUX
esrj-31427	18	4	traced	trace	VERB
esrj-31427	18	5	from	from	ADP
esrj-31427	18	6	each	each	DET
esrj-31427	18	7	depth	depth	NOUN
esrj-31427	18	8	point	point	NOUN
esrj-31427	18	9	in	in	ADP
esrj-31427	18	10	the	the	DET
esrj-31427	18	11	survey	survey	NOUN
esrj-31427	18	12	of	of	ADP
esrj-31427	18	13	each	each	DET
esrj-31427	18	14	source	source	NOUN
esrj-31427	18	15	-	-	PUNCT
esrj-31427	18	16	geophone	geophone	NOUN
esrj-31427	18	17	location	location	NOUN
esrj-31427	18	18	in	in	ADP
esrj-31427	18	19	order	order	NOUN
esrj-31427	18	20	to	to	PART
esrj-31427	18	21	determine	determine	VERB
esrj-31427	18	22	the	the	DET
esrj-31427	18	23	difraction	difraction	NOUN
esrj-31427	18	24	traveltime	traveltime	PROPN
esrj-31427	18	25	surface	surface	PROPN
esrj-31427	18	26	difraction	difraction	NOUN
esrj-31427	18	27	(	(	PUNCT
esrj-31427	18	28	huygens	huygens	PROPN
esrj-31427	18	29	surface	surface	PROPN
esrj-31427	18	30	)	)	PUNCT
esrj-31427	18	31	.	.	PUNCT
esrj-31427	19	1	then	then	ADV
esrj-31427	19	2	,	,	PUNCT
esrj-31427	19	3	the	the	DET
esrj-31427	19	4	weighted	weighted	ADJ
esrj-31427	19	5	diffraction	diffraction	NOUN
esrj-31427	19	6	stack	stack	NOUN
esrj-31427	19	7	operator	operator	NOUN
esrj-31427	19	8	could	could	AUX
esrj-31427	19	9	be	be	AUX
esrj-31427	19	10	used	use	VERB
esrj-31427	19	11	to	to	PART
esrj-31427	19	12	migrate	migrate	VERB
esrj-31427	19	13	the	the	DET
esrj-31427	19	14	seismic	seismic	ADJ
esrj-31427	19	15	data	datum	NOUN
esrj-31427	19	16	.	.	PUNCT
esrj-31427	20	1	in	in	ADP
esrj-31427	20	2	this	this	DET
esrj-31427	20	3	paper	paper	NOUN
esrj-31427	20	4	we	we	PRON
esrj-31427	20	5	present	present	VERB
esrj-31427	20	6	a	a	DET
esrj-31427	20	7	fast	fast	ADJ
esrj-31427	20	8	algorithm	algorithm	NOUN
esrj-31427	20	9	that	that	PRON
esrj-31427	20	10	is	be	AUX
esrj-31427	20	11	able	able	ADJ
esrj-31427	20	12	to	to	PART
esrj-31427	20	13	recover	recover	VERB
esrj-31427	20	14	true	true	ADJ
esrj-31427	20	15	amplitude	amplitude	NOUN
esrj-31427	20	16	in	in	ADP
esrj-31427	20	17	depth	depth	NOUN
esrj-31427	20	18	migration	migration	NOUN
esrj-31427	20	19	process	process	NOUN
esrj-31427	20	20	,	,	PUNCT
esrj-31427	20	21	by	by	ADP
esrj-31427	20	22	considering	consider	VERB
esrj-31427	20	23	manuscrrto	manuscrrto	PROPN
esrj-31427	20	24	recibido	recibido	PROPN
esrj-31427	20	25	para	para	PROPN
esrj-31427	20	26	evaluacion	evaluacion	NOUN
esrj-31427	20	27	el15	el15	PROPN
esrj-31427	20	28	de	de	PROPN
esrj-31427	20	29	junio	junio	PROPN
esrj-31427	20	30	de	de	PROPN
esrj-31427	20	31	2003	2003	NUM
esrj-31427	20	32	.	.	PUNCT
esrj-31427	21	1	articulo	articulo	PROPN
esrj-31427	21	2	aceptado	aceptado	PROPN
esrj-31427	21	3	para	para	PROPN
esrj-31427	21	4	publicae	publicae	PROPN
esrj-31427	21	5	ion	ion	NOUN
esrj-31427	21	6	por	por	PROPN
esrj-31427	21	7	el	el	PROPN
esrj-31427	21	8	comne	comne	PROPN
esrj-31427	21	9	editorial	editorial	PROPN
esrj-31427	21	10	el	el	PROPN
esrj-31427	21	11	36	36	NUM
esrj-31427	21	12	de	de	PROPN
esrj-31427	21	13	octubre	octubre	PROPN
esrj-31427	21	14	de	de	X
esrj-31427	21	15	2003	2003	NUM
esrj-31427	21	16	.	.	PUNCT
esrj-31427	22	1	gfofislca	gfofislca	NOUN
esrj-31427	22	2	cdlombiana	cdlombiana	PROPN
esrj-31427	22	3	.	.	PUNCT
esrj-31427	23	1	7	7	NUM
esrj-31427	23	2	,	,	PUNCT
esrj-31427	23	3	diciembre	diciembre	PROPN
esrj-31427	23	4	de	de	X
esrj-31427	23	5	2003	2003	NUM
esrj-31427	23	6	a	a	DET
esrj-31427	23	7	more	more	ADV
esrj-31427	23	8	particular	particular	ADJ
esrj-31427	23	9	situation	situation	NOUN
esrj-31427	23	10	when	when	SCONJ
esrj-31427	23	11	the	the	DET
esrj-31427	23	12	seismic	seismic	ADJ
esrj-31427	23	13	velocity	velocity	NOUN
esrj-31427	23	14	model	model	NOUN
esrj-31427	23	15	is	be	AUX
esrj-31427	23	16	represented	represent	VERB
esrj-31427	23	17	by	by	ADP
esrj-31427	23	18	a	a	DET
esrj-31427	23	19	linear	linear	ADJ
esrj-31427	23	20	distribution	distribution	NOUN
esrj-31427	23	21	variable	variable	NOUN
esrj-31427	23	22	with	with	ADP
esrj-31427	23	23	the	the	DET
esrj-31427	23	24	depth	depth	NOUN
esrj-31427	23	25	.	.	PUNCT
esrj-31427	24	1	this	this	DET
esrj-31427	24	2	kind	kind	NOUN
esrj-31427	24	3	of	of	ADP
esrj-31427	24	4	model	model	NOUN
esrj-31427	24	5	is	be	AUX
esrj-31427	24	6	important	important	ADJ
esrj-31427	24	7	for	for	ADP
esrj-31427	24	8	simulating	simulate	VERB
esrj-31427	24	9	many	many	ADJ
esrj-31427	24	10	situations	situation	NOUN
esrj-31427	24	11	in	in	ADP
esrj-31427	24	12	the	the	DET
esrj-31427	24	13	seismic	seismic	ADJ
esrj-31427	24	14	exploration	exploration	NOUN
esrj-31427	24	15	.	.	PUNCT
esrj-31427	25	1	for	for	ADP
esrj-31427	25	2	instance	instance	NOUN
esrj-31427	25	3	,	,	PUNCT
esrj-31427	25	4	variations	variation	NOUN
esrj-31427	25	5	of	of	ADP
esrj-31427	25	6	the	the	DET
esrj-31427	25	7	velocity	velocity	NOUN
esrj-31427	25	8	with	with	ADP
esrj-31427	25	9	depth	depth	NOUN
esrj-31427	25	10	,	,	PUNCT
esrj-31427	25	11	inversion	inversion	NOUN
esrj-31427	25	12	velocity	velocity	NOUN
esrj-31427	25	13	(	(	PUNCT
esrj-31427	25	14	negative	negative	ADJ
esrj-31427	25	15	gradient	gradient	NOUN
esrj-31427	25	16	)	)	PUNCT
esrj-31427	25	17	and	and	CCONJ
esrj-31427	25	18	increasing	increase	VERB
esrj-31427	25	19	of	of	ADP
esrj-31427	25	20	velocity	velocity	NOUN
esrj-31427	25	21	in	in	ADP
esrj-31427	25	22	a	a	DET
esrj-31427	25	23	short	short	ADJ
esrj-31427	25	24	layer	layer	NOUN
esrj-31427	25	25	(	(	PUNCT
esrj-31427	25	26	positive	positive	ADJ
esrj-31427	25	27	gradient	gradient	NOUN
esrj-31427	25	28	)	)	PUNCT
esrj-31427	25	29	.	.	PUNCT
esrj-31427	26	1	modelling	model	VERB
esrj-31427	26	2	asymptotic	asymptotic	ADJ
esrj-31427	26	3	ray	ray	NOUN
esrj-31427	26	4	theory	theory	NOUN
esrj-31427	26	5	provide	provide	VERB
esrj-31427	26	6	useful	useful	ADJ
esrj-31427	26	7	extrapolating	extrapolate	VERB
esrj-31427	26	8	techniques	technique	NOUN
esrj-31427	26	9	for	for	ADP
esrj-31427	26	10	modelling	modelling	NOUN
esrj-31427	26	11	,	,	PUNCT
esrj-31427	26	12	migration	migration	NOUN
esrj-31427	26	13	and	and	CCONJ
esrj-31427	26	14	inversion	inversion	NOUN
esrj-31427	26	15	,	,	PUNCT
esrj-31427	26	16	using	use	VERB
esrj-31427	26	17	ray	ray	NOUN
esrj-31427	26	18	theory	theory	NOUN
esrj-31427	26	19	of	of	ADP
esrj-31427	26	20	coordinates	coordinate	NOUN
esrj-31427	26	21	tracing	trace	VERB
esrj-31427	26	22	equations	equation	NOUN
esrj-31427	26	23	which	which	PRON
esrj-31427	26	24	determine	determine	VERB
esrj-31427	26	25	the	the	DET
esrj-31427	26	26	second	second	ADJ
esrj-31427	26	27	derivatives	derivative	NOUN
esrj-31427	26	28	of	of	ADP
esrj-31427	26	29	the	the	DET
esrj-31427	26	30	traveltime	traveltime	NOUN
esrj-31427	26	31	curve	curve	NOUN
esrj-31427	26	32	.	.	PUNCT
esrj-31427	27	1	this	this	PRON
esrj-31427	27	2	is	be	AUX
esrj-31427	27	3	desired	desire	VERB
esrj-31427	27	4	in	in	ADP
esrj-31427	27	5	order	order	NOUN
esrj-31427	27	6	to	to	PART
esrj-31427	27	7	determine	determine	VERB
esrj-31427	27	8	geometrical	geometrical	ADJ
esrj-31427	27	9	spreading	spreading	NOUN
esrj-31427	27	10	,	,	PUNCT
esrj-31427	27	11	and	and	CCONJ
esrj-31427	27	12	then	then	ADV
esrj-31427	27	13	true	true	ADJ
esrj-31427	27	14	amplitude	amplitude	NOUN
esrj-31427	27	15	recovery	recovery	NOUN
esrj-31427	27	16	.	.	PUNCT
esrj-31427	28	1	in	in	ADP
esrj-31427	28	2	order	order	NOUN
esrj-31427	28	3	to	to	PART
esrj-31427	28	4	know	know	VERB
esrj-31427	28	5	71	71	NUM
esrj-31427	28	6	luis	luis	PROPN
esrj-31427	28	7	antonio	antonio	PROPN
esrj-31427	28	8	castillo	castillo	PROPN
esrj-31427	28	9	l6pez	l6pez	PROPN
esrj-31427	28	10	ray	ray	PROPN
esrj-31427	28	11	irajelory	irajelory	ADJ
esrj-31427	28	12	with	with	ADP
esrj-31427	28	13	positive	positive	ADJ
esrj-31427	28	14	gradient	gradient	NOUN
esrj-31427	28	15	velocity	velocity	NOUN
esrj-31427	28	16	0.5	0.5	NUM
esrj-31427	28	17	e	e	NOUN
esrj-31427	28	18	~1.5	~1.5	X
esrj-31427	28	19	!	!	PUNCT
esrj-31427	29	1	2.51	2.51	NUM
esrj-31427	29	2	-	-	SYM
esrj-31427	29	3	-----3l-'::-----'--,j-'---	-----3l-'::-----'--,j-'---	NOUN
esrj-31427	29	4	'	'	PUNCT
esrj-31427	29	5	o	o	NOUN
esrj-31427	29	6	0.5	0.5	NUM
esrj-31427	29	7	1.5	1.5	NUM
esrj-31427	29	8	2.5	2.5	NUM
esrj-31427	29	9	offset	offset	NOUN
esrj-31427	29	10	(	(	PUNCT
esrj-31427	29	11	km	km	NOUN
esrj-31427	29	12	)	)	PUNCT
esrj-31427	29	13	0.5	0.5	NUM
esrj-31427	29	14	ec	ec	PROPN
esrj-31427	29	15	-e	-e	PROPN
esrj-31427	29	16	1.5	1.5	NUM
esrj-31427	29	17	!	!	PUNCT
esrj-31427	30	1	2.51	2.51	NUM
esrj-31427	30	2	-	-	SYM
esrj-31427	30	3	-----	-----	PUNCT
esrj-31427	30	4	...........	...........	PUNCT
esrj-31427	31	1	3l-----''--	3l-----''--	NUM
esrj-31427	31	2	'	'	PART
esrj-31427	31	3	---'--'----l	---'--'----l	NOUN
esrj-31427	31	4	o	o	NOUN
esrj-31427	31	5	0.5	0.5	NUM
esrj-31427	31	6	1.5	1.5	NUM
esrj-31427	31	7	2	2	NUM
esrj-31427	31	8	offset	offset	NOUN
esrj-31427	31	9	(	(	PUNCT
esrj-31427	31	10	kml	kml	PROPN
esrj-31427	31	11	figure	figure	NOUN
esrj-31427	31	12	i.	i.	NOUN
esrj-31427	31	13	models	model	NOUN
esrj-31427	31	14	for	for	ADP
esrj-31427	31	15	differents	different	NOUN
esrj-31427	31	16	gradients	gradient	NOUN
esrj-31427	31	17	in	in	ADP
esrj-31427	31	18	a	a	DET
esrj-31427	31	19	configuration	configuration	NOUN
esrj-31427	31	20	common	common	ADJ
esrj-31427	31	21	shot	shot	NOUN
esrj-31427	31	22	.	.	PUNCT
esrj-31427	32	1	gradient	gradient	ADJ
esrj-31427	32	2	positive	positive	ADJ
esrj-31427	32	3	(	(	PUNCT
esrj-31427	32	4	left	left	ADJ
esrj-31427	32	5	)	)	PUNCT
esrj-31427	32	6	and	and	CCONJ
esrj-31427	32	7	gradient	gradient	ADJ
esrj-31427	32	8	negative	negative	ADJ
esrj-31427	32	9	(	(	PUNCT
esrj-31427	32	10	rigth	rigth	NOUN
esrj-31427	32	11	)	)	PUNCT
esrj-31427	32	12	,	,	PUNCT
esrj-31427	32	13	the	the	DET
esrj-31427	32	14	stability	stability	NOUN
esrj-31427	32	15	of	of	ADP
esrj-31427	32	16	the	the	DET
esrj-31427	32	17	diffraction	diffraction	NOUN
esrj-31427	32	18	stack	stack	NOUN
esrj-31427	32	19	migration	migration	NOUN
esrj-31427	32	20	algorithm	algorithm	NOUN
esrj-31427	32	21	,	,	PUNCT
esrj-31427	32	22	we	we	PRON
esrj-31427	32	23	have	have	AUX
esrj-31427	32	24	applied	apply	VERB
esrj-31427	32	25	it	it	PRON
esrj-31427	32	26	to	to	ADP
esrj-31427	32	27	a	a	DET
esrj-31427	32	28	set	set	NOUN
esrj-31427	32	29	of	of	ADP
esrj-31427	32	30	seismic	seismic	ADJ
esrj-31427	32	31	data	datum	NOUN
esrj-31427	32	32	in	in	ADP
esrj-31427	32	33	a	a	DET
esrj-31427	32	34	common	common	ADJ
esrj-31427	32	35	-	-	PUNCT
esrj-31427	32	36	shot	shot	NOUN
esrj-31427	32	37	configuration	configuration	NOUN
esrj-31427	32	38	.	.	PUNCT
esrj-31427	33	1	diffraction	diffraction	NOUN
esrj-31427	33	2	stack	stack	NOUN
esrj-31427	33	3	operator	operator	NOUN
esrj-31427	33	4	after	after	ADP
esrj-31427	33	5	data	datum	NOUN
esrj-31427	33	6	input	input	NOUN
esrj-31427	33	7	,	,	PUNCT
esrj-31427	33	8	two	two	NUM
esrj-31427	33	9	-	-	PUNCT
esrj-31427	33	10	dimensional	dimensional	ADJ
esrj-31427	33	11	diffraction	diffraction	NOUN
esrj-31427	33	12	stack	stack	NOUN
esrj-31427	33	13	operator	operator	NOUN
esrj-31427	33	14	can	can	AUX
esrj-31427	33	15	be	be	AUX
esrj-31427	33	16	written	write	VERB
esrj-31427	33	17	following	follow	VERB
esrj-31427	33	18	the	the	DET
esrj-31427	33	19	expression	expression	NOUN
esrj-31427	33	20	given	give	VERB
esrj-31427	33	21	by	by	ADP
esrj-31427	33	22	urban	urban	ADJ
esrj-31427	33	23	(	(	PUNCT
esrj-31427	33	24	1999	1999	NUM
esrj-31427	33	25	)	)	PUNCT
esrj-31427	33	26	,	,	PUNCT
esrj-31427	33	27	based	base	VERB
esrj-31427	33	28	on	on	ADP
esrj-31427	33	29	martins	martin	NOUN
esrj-31427	33	30	et	et	NOUN
esrj-31427	33	31	al	al	PROPN
esrj-31427	33	32	.	.	PUNCT
esrj-31427	34	1	(	(	PUNCT
esrj-31427	34	2	1998	1998	NUM
esrj-31427	34	3	)	)	PUNCT
esrj-31427	34	4	72	72	NUM
esrj-31427	34	5	seismogram	seismogram	NOUN
esrj-31427	34	6	distance	distance	NOUN
esrj-31427	34	7	o	o	NOUN
esrj-31427	34	8	0	0	NUM
esrj-31427	34	9	5	5	NUM
esrj-31427	34	10	(	(	PUNCT
esrj-31427	34	11	km	km	PROPN
esrj-31427	34	12	)	)	PUNCT
esrj-31427	34	13	i	i	PRON
esrj-31427	34	14	1.5	1.5	NUM
esrj-31427	34	15	2	2	NUM
esrj-31427	34	16	i	i	PRON
esrj-31427	34	17	-i------=+=~~~_rt'-i	-i------=+=~~~_rt'-i	NOUN
esrj-31427	34	18	-	-	PUNCT
esrj-31427	34	19	r-,	r-,	NOUN
esrj-31427	34	20	....	....	PUNCT
esrj-31427	34	21	,	,	PUNCT
esrj-31427	34	22	...	...	PUNCT
esrj-31427	34	23	,~.,	,~.,	PUNCT
esrj-31427	34	24	....	....	PUNCT
esrj-31427	34	25	,	,	PUNCT
esrj-31427	34	26	..	..	PUNCT
esrj-31427	34	27	-,--l----___+	-,--l----___+	X
esrj-31427	35	1	e	e	X
esrj-31427	35	2	0.5	0.5	NUM
esrj-31427	35	3	-i------+-++-i-++-;.+:~~f.l	-i------+-++-i-++-;.+:~~f.l	NOUN
esrj-31427	35	4	=	=	NOUN
esrj-31427	35	5	m"!-'l-+-----____+	m"!-'l-+-----____+	NOUN
esrj-31427	35	6	f.==	f.==	ADJ
esrj-31427	35	7	o	o	ADJ
esrj-31427	35	8	-	-	ADJ
esrj-31427	35	9	l------j	l------j	ADJ
esrj-31427	35	10	-	-	PUNCT
esrj-31427	35	11	lllllllllj	lllllllllj	NOUN
esrj-31427	35	12	...	...	PUNCT
esrj-31427	35	13	ljlulu--'--'--'--,------t	ljlulu--'--'--'--,------t	NOUN
esrj-31427	35	14	ray	ray	NOUN
esrj-31427	35	15	trajectories	trajectory	NOUN
esrj-31427	35	16	in	in	ADP
esrj-31427	35	17	constant	constant	ADJ
esrj-31427	35	18	gradient	gradient	NOUN
esrj-31427	35	19	velocity	velocity	NOUN
esrj-31427	35	20	media	medium	NOUN
esrj-31427	35	21	with	with	ADP
esrj-31427	35	22	commom	commom	NOUN
esrj-31427	35	23	shot	shot	NOUN
esrj-31427	35	24	configuration	configuration	NOUN
esrj-31427	35	25	o	o	X
esrj-31427	35	26	r-~-----''''-'-"t't'rr	r-~-----''''-'-"t't'rr	VERB
esrj-31427	35	27	-	-	PUNCT
esrj-31427	35	28	rt'crroct>--rt	rt'crroct>--rt	X
esrj-31427	35	29	..	..	PUNCT
esrj-31427	35	30	--.rrr~~~---	--.rrr~~~---	PUNCT
esrj-31427	35	31	'	'	PUNCT
esrj-31427	35	32	vo=2kml	vo=2kml	NOUN
esrj-31427	35	33	0.2	0.2	NUM
esrj-31427	35	34	i	i	NOUN
esrj-31427	35	35	;	;	PUNCT
esrj-31427	35	36	s	s	PART
esrj-31427	35	37	0.4	0.4	NUM
esrj-31427	35	38	c.	c.	NOUN
esrj-31427	35	39	ojo	ojo	PROPN
esrj-31427	35	40	0.6	0.6	NUM
esrj-31427	35	41	0.8l--~-~~~~-~-~-~-~-~----j	0.8l--~-~~~~-~-~-~-~-~----j	NOUN
esrj-31427	36	1	o	o	NOUN
esrj-31427	36	2	0.2	0.2	NUM
esrj-31427	36	3	0.4	0.4	NUM
esrj-31427	36	4	0.6	0.6	NUM
esrj-31427	36	5	0.8	0.8	NUM
esrj-31427	36	6	1	1	NUM
esrj-31427	36	7	1.2	1.2	NUM
esrj-31427	36	8	1.4	1.4	NUM
esrj-31427	36	9	1.6	1.6	NUM
esrj-31427	36	10	1.8	1.8	NUM
esrj-31427	36	11	offset	offset	NOUN
esrj-31427	36	12	(	(	PUNCT
esrj-31427	36	13	km	km	NOUN
esrj-31427	36	14	)	)	PUNCT
esrj-31427	36	15	figure	figure	NOUN
esrj-31427	36	16	2	2	NUM
esrj-31427	36	17	.	.	NOUN
esrj-31427	36	18	ray	ray	PROPN
esrj-31427	36	19	trajectory	trajectory	PROPN
esrj-31427	36	20	model(lower	model(lower	PROPN
esrj-31427	36	21	)	)	PUNCT
esrj-31427	36	22	and	and	CCONJ
esrj-31427	36	23	synthetic	synthetic	ADJ
esrj-31427	36	24	seismogram(upper	seismogram(upper	NOUN
esrj-31427	36	25	)	)	PUNCT
esrj-31427	36	26	.	.	PUNCT
esrj-31427	37	1	v(m	v(m	NOUN
esrj-31427	37	2	,	,	PUNCT
esrj-31427	37	3	t)=	t)=	NOUN
esrj-31427	37	4	rbfd	rbfd	VERB
esrj-31427	37	5	~	~	PUNCT
esrj-31427	37	6	w(~,m)~	w(~,m)~	PROPN
esrj-31427	37	7	u	u	NOUN
esrj-31427	37	8	(	(	PUNCT
esrj-31427	37	9	~,t+td	~,t+td	NOUN
esrj-31427	37	10	)	)	PUNCT
esrj-31427	37	11	v21	v21	ADP
esrj-31427	37	12	t	t	PROPN
esrj-31427	37	13	a	a	X
esrj-31427	37	14	(	(	PUNCT
esrj-31427	37	15	1	1	NUM
esrj-31427	37	16	)	)	PUNCT
esrj-31427	37	17	with	with	ADP
esrj-31427	37	18	the	the	DET
esrj-31427	37	19	source	source	NOUN
esrj-31427	37	20	and	and	CCONJ
esrj-31427	37	21	receiver	receiver	ADJ
esrj-31427	37	22	pairs	pair	NOUN
esrj-31427	37	23	(	(	PUNCT
esrj-31427	37	24	s	s	X
esrj-31427	37	25	,	,	PUNCT
esrj-31427	37	26	g	g	NOUN
esrj-31427	37	27	)	)	PUNCT
esrj-31427	37	28	described	describe	VERB
esrj-31427	37	29	by	by	ADP
esrj-31427	37	30	the	the	DET
esrj-31427	37	31	vector	vector	NOUN
esrj-31427	37	32	parameter	parameter	NOUN
esrj-31427	37	33	and	and	CCONJ
esrj-31427	37	34	the	the	DET
esrj-31427	37	35	traveltime	traveltime	NOUN
esrj-31427	37	36	curve	curve	NOUN
esrj-31427	37	37	defined	define	VERB
esrj-31427	37	38	by	by	ADP
esrj-31427	37	39	all	all	DET
esrj-31427	37	40	the	the	DET
esrj-31427	37	41	points	point	NOUN
esrj-31427	37	42	of	of	ADP
esrj-31427	37	43	on	on	ADP
esrj-31427	37	44	the	the	DET
esrj-31427	37	45	earth	earth	NOUN
esrj-31427	37	46	surface	surface	NOUN
esrj-31427	37	47	,	,	PUNCT
esrj-31427	37	48	and	and	CCONJ
esrj-31427	37	49	a	a	DET
esrj-31427	37	50	point	point	NOUN
esrj-31427	37	51	m	m	VERB
esrj-31427	37	52	in	in	ADP
esrj-31427	37	53	depth	depth	NOUN
esrj-31427	37	54	.	.	PUNCT
esrj-31427	38	1	ar	ar	VERB
esrj-31427	38	2	~	~	SYM
esrj-31427	38	3	u	u	X
esrj-31427	38	4	(	(	PUNCT
esrj-31427	38	5	~	~	PROPN
esrj-31427	38	6	,	,	PUNCT
esrj-31427	38	7	t	t	PROPN
esrj-31427	38	8	+	+	PROPN
esrj-31427	38	9	,	,	PUNCT
esrj-31427	38	10	d	d	NOUN
esrj-31427	38	11	)	)	PUNCT
esrj-31427	38	12	is	be	AUX
esrj-31427	38	13	the	the	DET
esrj-31427	38	14	anti	anti	ADJ
esrj-31427	38	15	-	-	ADJ
esrj-31427	38	16	causal	causal	ADJ
esrj-31427	38	17	half	half	ADJ
esrj-31427	38	18	-	-	PUNCT
esrj-31427	38	19	time	time	NOUN
esrj-31427	38	20	derivative	derivative	NOUN
esrj-31427	38	21	(	(	PUNCT
esrj-31427	38	22	operator	operator	NOUN
esrj-31427	38	23	that	that	PRON
esrj-31427	38	24	corresponds	correspond	VERB
esrj-31427	38	25	in	in	ADP
esrj-31427	38	26	the	the	DET
esrj-31427	38	27	frequency	frequency	NOUN
esrj-31427	38	28	domain	domain	NOUN
esrj-31427	38	29	to	to	ADP
esrj-31427	38	30	the	the	DET
esrj-31427	38	31	filter.j	filter.j	PROPN
esrj-31427	38	32	-iw	-iw	NOUN
esrj-31427	38	33	)	)	PUNCT
esrj-31427	38	34	of	of	ADP
esrj-31427	38	35	the	the	DET
esrj-31427	38	36	seismic	seismic	ADJ
esrj-31427	38	37	trace	trace	NOUN
esrj-31427	38	38	u	u	NOUN
esrj-31427	38	39	(	(	PUNCT
esrj-31427	38	40	~,t	~,t	ADP
esrj-31427	38	41	+	+	NOUN
esrj-31427	38	42	'd	have	AUX
esrj-31427	38	43	)	)	PUNCT
esrj-31427	38	44	registered	register	VERB
esrj-31427	38	45	on	on	ADP
esrj-31427	38	46	the	the	DET
esrj-31427	38	47	geophone	geophone	NOUN
esrj-31427	38	48	position	position	NOUN
esrj-31427	38	49	g	g	NOUN
esrj-31427	38	50	(	(	PUNCT
esrj-31427	38	51	~	~	NOUN
esrj-31427	38	52	)	)	PUNCT
esrj-31427	38	53	,	,	PUNCT
esrj-31427	38	54	and	and	CCONJ
esrj-31427	38	55	it	it	PRON
esrj-31427	38	56	represents	represent	VERB
esrj-31427	38	57	the	the	DET
esrj-31427	38	58	principal	principal	ADJ
esrj-31427	38	59	component	component	NOUN
esrj-31427	38	60	of	of	ADP
esrj-31427	38	61	the	the	DET
esrj-31427	38	62	seismic	seismic	ADJ
esrj-31427	38	63	primary	primary	NOUN
esrj-31427	38	64	reflected	reflect	VERB
esrj-31427	38	65	wavefield	wavefield	NOUN
esrj-31427	38	66	.	.	PUNCT
esrj-31427	39	1	the	the	DET
esrj-31427	39	2	result	result	NOUN
esrj-31427	39	3	of	of	ADP
esrj-31427	39	4	the	the	DET
esrj-31427	39	5	integral	integral	ADJ
esrj-31427	39	6	(	(	PUNCT
esrj-31427	39	7	i	i	NOUN
esrj-31427	39	8	)	)	PUNCT
esrj-31427	39	9	is	be	AUX
esrj-31427	39	10	put	put	VERB
esrj-31427	39	11	at	at	ADP
esrj-31427	39	12	the	the	DET
esrj-31427	39	13	point	point	NOUN
esrj-31427	39	14	m	m	NOUN
esrj-31427	39	15	into	into	ADP
esrj-31427	39	16	the	the	DET
esrj-31427	39	17	model	model	NOUN
esrj-31427	39	18	.	.	PUNCT
esrj-31427	40	1	providing	provide	VERB
esrj-31427	40	2	that	that	SCONJ
esrj-31427	40	3	we	we	PRON
esrj-31427	40	4	call	call	VERB
esrj-31427	40	5	depth	depth	NOUN
esrj-31427	40	6	difraction	difraction	NOUN
esrj-31427	40	7	stack	stack	NOUN
esrj-31427	40	8	migration	migration	NOUN
esrj-31427	40	9	,	,	PUNCT
esrj-31427	40	10	with	with	ADP
esrj-31427	40	11	all	all	DET
esrj-31427	40	12	lines	line	NOUN
esrj-31427	40	13	summed	sum	VERB
esrj-31427	40	14	along	along	ADP
esrj-31427	40	15	the	the	DET
esrj-31427	40	16	stacking	stacking	NOUN
esrj-31427	40	17	line	line	NOUN
esrj-31427	40	18	and	and	CCONJ
esrj-31427	40	19	multiplied	multiply	VERB
esrj-31427	40	20	by	by	ADP
esrj-31427	40	21	the	the	DET
esrj-31427	40	22	true	true	ADJ
esrj-31427	40	23	amplitude	amplitude	NOUN
esrj-31427	40	24	(	(	PUNCT
esrj-31427	40	25	weight	weight	NOUN
esrj-31427	40	26	function	function	NOUN
esrj-31427	40	27	)	)	PUNCT
esrj-31427	40	28	w(~,t-'d	w(~,t-'d	ADJ
esrj-31427	40	29	)	)	PUNCT
esrj-31427	40	30	and	and	CCONJ
esrj-31427	40	31	summed	sum	VERB
esrj-31427	40	32	,	,	PUNCT
esrj-31427	40	33	then	then	ADV
esrj-31427	40	34	the	the	DET
esrj-31427	40	35	result	result	NOUN
esrj-31427	40	36	of	of	ADP
esrj-31427	40	37	migration	migration	NOUN
esrj-31427	40	38	process	process	NOUN
esrj-31427	40	39	is	be	AUX
esrj-31427	40	40	proportional	proportional	ADJ
esrj-31427	40	41	to	to	ADP
esrj-31427	40	42	the	the	DET
esrj-31427	40	43	reflection	reflection	NOUN
esrj-31427	40	44	coefficient	coefficient	NOUN
esrj-31427	40	45	recovered	recover	VERB
esrj-31427	40	46	.	.	PUNCT
esrj-31427	41	1	2.5	2.5	NUM
esrj-31427	41	2	diffraction	diffraction	NOUN
esrj-31427	41	3	traveltime	traveltime	NOUN
esrj-31427	41	4	stack	stack	NOUN
esrj-31427	41	5	curve	curve	NOUN
esrj-31427	41	6	being	be	AUX
esrj-31427	41	7	known	know	VERB
esrj-31427	41	8	the	the	DET
esrj-31427	41	9	macrovelocity	macrovelocity	NOUN
esrj-31427	41	10	model	model	NOUN
esrj-31427	41	11	with	with	ADP
esrj-31427	41	12	a	a	DET
esrj-31427	41	13	distribution	distribution	NOUN
esrj-31427	41	14	of	of	ADP
esrj-31427	41	15	velocity	velocity	NOUN
esrj-31427	41	16	varying	vary	VERB
esrj-31427	41	17	linearly	linearly	ADV
esrj-31427	41	18	with	with	ADP
esrj-31427	41	19	depth	depth	NOUN
esrj-31427	41	20	the	the	DET
esrj-31427	41	21	diffraction	diffraction	NOUN
esrj-31427	41	22	traveltime	traveltime	NOUN
esrj-31427	41	23	stack	stack	NOUN
esrj-31427	41	24	curve	curve	NOUN
esrj-31427	41	25	can	can	AUX
esrj-31427	41	26	be	be	AUX
esrj-31427	41	27	built	build	VERB
esrj-31427	41	28	,	,	PUNCT
esrj-31427	41	29	for	for	ADP
esrj-31427	41	30	the	the	DET
esrj-31427	41	31	diffraction	diffraction	NOUN
esrj-31427	41	32	stack	stack	NOUN
esrj-31427	41	33	processing	processing	NOUN
esrj-31427	41	34	v(z)=vo	v(z)=vo	VERB
esrj-31427	41	35	+	+	ADJ
esrj-31427	41	36	gz	gz	ADJ
esrj-31427	41	37	(	(	PUNCT
esrj-31427	41	38	2	2	NUM
esrj-31427	41	39	)	)	PUNCT
esrj-31427	41	40	where	where	SCONJ
esrj-31427	41	41	vo	vo	PRON
esrj-31427	41	42	is	be	AUX
esrj-31427	41	43	the	the	DET
esrj-31427	41	44	velocity	velocity	NOUN
esrj-31427	41	45	near	near	ADP
esrj-31427	41	46	the	the	DET
esrj-31427	41	47	earth	earth	NOUN
esrj-31427	41	48	surface	surface	NOUN
esrj-31427	41	49	,	,	PUNCT
esrj-31427	41	50	g	g	PROPN
esrj-31427	41	51	is	be	AUX
esrj-31427	41	52	the	the	DET
esrj-31427	41	53	gradient	gradient	NOUN
esrj-31427	41	54	of	of	ADP
esrj-31427	41	55	the	the	DET
esrj-31427	41	56	velocity	velocity	NOUN
esrj-31427	41	57	function	function	NOUN
esrj-31427	41	58	in	in	ADP
esrj-31427	41	59	the	the	DET
esrj-31427	41	60	direction	direction	NOUN
esrj-31427	41	61	of	of	ADP
esrj-31427	41	62	the	the	DET
esrj-31427	41	63	vertical	vertical	ADJ
esrj-31427	41	64	axis	axis	NOUN
esrj-31427	41	65	z	z	PROPN
esrj-31427	41	66	,	,	PUNCT
esrj-31427	41	67	in	in	ADP
esrj-31427	41	68	depth	depth	NOUN
esrj-31427	41	69	.	.	PUNCT
esrj-31427	42	1	this	this	DET
esrj-31427	42	2	kind	kind	NOUN
esrj-31427	42	3	of	of	ADP
esrj-31427	42	4	velocity	velocity	NOUN
esrj-31427	42	5	function	function	NOUN
esrj-31427	42	6	is	be	AUX
esrj-31427	42	7	the	the	DET
esrj-31427	42	8	first	first	ADJ
esrj-31427	42	9	approximation	approximation	NOUN
esrj-31427	42	10	to	to	PART
esrj-31427	42	11	be	be	AUX
esrj-31427	42	12	considered	consider	VERB
esrj-31427	42	13	when	when	SCONJ
esrj-31427	42	14	investigating	investigate	VERB
esrj-31427	42	15	the	the	DET
esrj-31427	42	16	regional	regional	ADJ
esrj-31427	42	17	variations	variation	NOUN
esrj-31427	42	18	of	of	ADP
esrj-31427	42	19	velocity	velocity	NOUN
esrj-31427	42	20	for	for	ADP
esrj-31427	42	21	most	most	ADJ
esrj-31427	42	22	sedimentary	sedimentary	ADJ
esrj-31427	42	23	rocks	rock	NOUN
esrj-31427	42	24	(	(	PUNCT
esrj-31427	42	25	lapsen	lapsen	ADJ
esrj-31427	42	26	,	,	PUNCT
esrj-31427	42	27	1993	1993	NUM
esrj-31427	42	28	)	)	PUNCT
esrj-31427	42	29	.	.	PUNCT
esrj-31427	43	1	geofisiga	geofisiga	VERB
esrj-31427	43	2	golombiana	golombiana	PROPN
esrj-31427	43	3	,	,	PUNCT
esrj-31427	43	4	7	7	NUM
esrj-31427	43	5	,	,	PUNCT
esrj-31427	43	6	oigiembre	oigiembre	PROPN
esrj-31427	43	7	de	de	PROPN
esrj-31427	43	8	2003	2003	NUM
esrj-31427	43	9	true	true	ADJ
esrj-31427	43	10	amplitude	amplitude	NOUN
esrj-31427	43	11	migration	migration	NOUN
esrj-31427	43	12	in	in	ADP
esrj-31427	43	13	constant	constant	ADJ
esrj-31427	43	14	gradient	gradient	NOUN
esrj-31427	43	15	velocity	velocity	NOUN
esrj-31427	43	16	media	medium	NOUN
esrj-31427	43	17	1.9,----,------,-----,,---,---r----,--,.--	1.9,----,------,-----,,---,---r----,--,.--	NUM
esrj-31427	43	18	....	....	PUNCT
esrj-31427	43	19	,	,	PUNCT
esrj-31427	43	20	1.85r	1.85r	NUM
esrj-31427	43	21	·	·	SYM
esrj-31427	43	22	·	·	SYM
esrj-31427	43	23	·	·	PUNCT
esrj-31427	43	24	·	·	PUNCT
esrj-31427	43	25	·	·	PUNCT
esrj-31427	43	26	·	·	PUNCT
esrj-31427	43	27	·	·	PUNCT
esrj-31427	43	28	·	·	PUNCT
esrj-31427	43	29	·	·	PUNCT
esrj-31427	43	30	,	,	PUNCT
esrj-31427	43	31	...........	...........	PUNCT
esrj-31427	43	32	t	t	X
esrj-31427	43	33	·	·	SYM
esrj-31427	43	34	·	·	PUNCT
esrj-31427	43	35	·	·	PUNCT
esrj-31427	43	36	·	·	PUNCT
esrj-31427	43	37	·	·	PUNCT
esrj-31427	43	38	·	·	PUNCT
esrj-31427	43	39	·	·	PUNCT
esrj-31427	43	40	·	·	PUNCT
esrj-31427	43	41	·	·	PUNCT
esrj-31427	43	42	·	·	PUNCT
esrj-31427	43	43	·	·	PUNCT
esrj-31427	43	44	,	,	PUNCT
esrj-31427	43	45	l	l	NOUN
esrj-31427	43	46	;	;	PUNCT
esrj-31427	43	47	..............	..............	PUNCT
esrj-31427	43	48	,	,	PUNCT
esrj-31427	43	49	.............	.............	PUNCT
esrj-31427	43	50	"	"	PUNCT
esrj-31427	43	51	...	...	PUNCT
esrj-31427	44	1	~	~	PUNCT
esrj-31427	44	2	~	~	PUNCT
esrj-31427	44	3	1.8	1.8	NUM
esrj-31427	44	4	r	r	X
esrj-31427	44	5	·	·	SYM
esrj-31427	44	6	·	·	PUNCT
esrj-31427	44	7	·	·	PUNCT
esrj-31427	44	8	·	·	PUNCT
esrj-31427	44	9	·	·	PUNCT
esrj-31427	44	10	·	·	PUNCT
esrj-31427	44	11	·	·	PUNCT
esrj-31427	44	12	·	·	PUNCT
esrj-31427	44	13	·	·	PUNCT
esrj-31427	44	14	·	·	PUNCT
esrj-31427	44	15	·	·	PUNCT
esrj-31427	44	16	·	·	PUNCT
esrj-31427	44	17	.j	.j	PROPN
esrj-31427	44	18	,	,	PUNCT
esrj-31427	44	19	...........	...........	PUNCT
esrj-31427	44	20	,	,	PUNCT
esrj-31427	44	21	,	,	PUNCT
esrj-31427	44	22	,	,	PUNCT
esrj-31427	44	23	...........	...........	PUNCT
esrj-31427	44	24	w	w	NOUN
esrj-31427	44	25	,	,	PUNCT
esrj-31427	44	26	,	,	PUNCT
esrj-31427	44	27	..	..	PUNCT
esrj-31427	44	28	,	,	PUNCT
esrj-31427	44	29	?	?	PUNCT
esrj-31427	45	1	<	<	X
esrj-31427	45	2	.	.	PUNCT
esrj-31427	45	3	,	,	PUNCT
esrj-31427	45	4	~	~	PUNCT
esrj-31427	45	5	~	~	PUNCT
esrj-31427	45	6	1.75	1.75	NUM
esrj-31427	45	7	r	r	X
esrj-31427	45	8	·	·	SYM
esrj-31427	45	9	·	·	PUNCT
esrj-31427	45	10	·	·	PUNCT
esrj-31427	45	11	·	·	PUNCT
esrj-31427	45	12	·	·	PUNCT
esrj-31427	45	13	·	·	PUNCT
esrj-31427	45	14	·	·	PUNCT
esrj-31427	45	15	·	·	PUNCT
esrj-31427	45	16	·	·	PUNCT
esrj-31427	45	17	·	·	PUNCT
esrj-31427	45	18	·	·	PUNCT
esrj-31427	45	19	·	·	PUNCT
esrj-31427	45	20	,	,	PUNCT
esrj-31427	45	21	·	·	PUNCT
esrj-31427	45	22	·	·	PUNCT
esrj-31427	45	23	·	·	PUNCT
esrj-31427	45	24	·	·	PUNCT
esrj-31427	45	25	·	·	PUNCT
esrj-31427	45	26	·	·	PUNCT
esrj-31427	45	27	·	·	PUNCT
esrj-31427	45	28	·	·	PUNCT
esrj-31427	45	29	·	·	PUNCT
esrj-31427	45	30	·	·	PUNCT
esrj-31427	45	31	·	·	PUNCT
esrj-31427	45	32	"	"	PUNCT
esrj-31427	45	33	'	'	PUNCT
esrj-31427	45	34	,	,	PUNCT
esrj-31427	45	35	.......	.......	PUNCT
esrj-31427	45	36	;	;	PUNCT
esrj-31427	45	37	;	;	PUNCT
esrj-31427	45	38	;	;	PUNCT
esrj-31427	45	39	·	·	PUNCT
esrj-31427	45	40	·	·	PUNCT
esrj-31427	45	41	·	·	PUNCT
esrj-31427	45	42	·	·	PUNCT
esrj-31427	45	43	:	:	PUNCT
esrj-31427	45	44	<	<	X
esrj-31427	45	45	'	'	PUNCT
esrj-31427	45	46	a::···············l	a::···············l	VERB
esrj-31427	45	47	~	~	PUNCT
esrj-31427	45	48	;	;	PUNCT
esrj-31427	45	49	:	:	PUNCT
esrj-31427	45	50	:	:	PUNCT
esrj-31427	45	51	1.7	1.7	NUM
esrj-31427	45	52	r···········+···············f	r···········+···············f	VERB
esrj-31427	45	53	.	.	PUNCT
esrj-31427	45	54	"-:~~==~4:···w	"-:~~==~4:···w	NOUN
esrj-31427	45	55	!	!	PUNCT
esrj-31427	45	56	.	.	PUNCT
esrj-31427	46	1	]	]	PUNCT
esrj-31427	46	2	.	.	PUNCT
esrj-31427	47	1	~	~	PUNCT
esrj-31427	47	2	1.65	1.65	NUM
esrj-31427	47	3	r···········t	r···········t	NOUN
esrj-31427	47	4	·	·	SYM
esrj-31427	47	5	·	·	PUNCT
esrj-31427	47	6	·	·	PUNCT
esrj-31427	47	7	·	·	PUNCT
esrj-31427	47	8	·	·	PUNCT
esrj-31427	47	9	·	·	PUNCT
esrj-31427	47	10	·	·	PUNCT
esrj-31427	47	11	·	·	PUNCT
esrj-31427	47	12	·	·	PUNCT
esrj-31427	47	13	·	·	SYM
esrj-31427	47	14	·	·	SYM
esrj-31427	47	15	t	t	PROPN
esrj-31427	47	16	·	·	SYM
esrj-31427	47	17	·	·	PUNCT
esrj-31427	47	18	·	·	PUNCT
esrj-31427	47	19	·	·	PUNCT
esrj-31427	47	20	·	·	PUNCT
esrj-31427	47	21	·	·	PUNCT
esrj-31427	47	22	·	·	PUNCT
esrj-31427	47	23	·	·	PUNCT
esrj-31427	47	24	·	·	PUNCT
esrj-31427	47	25	·	·	PUNCT
esrj-31427	47	26	·	·	PUNCT
esrj-31427	47	27	;	;	PUNCT
esrj-31427	47	28	,	,	PUNCT
esrj-31427	47	29	...........	...........	PUNCT
esrj-31427	47	30	.i	.i	PROPN
esrj-31427	47	31	.	.	PUNCT
esrj-31427	47	32	;	;	PUNCT
esrj-31427	47	33	;	;	PUNCT
esrj-31427	47	34	....	....	PUNCT
esrj-31427	47	35	~	~	PUNCT
esrj-31427	47	36	0.5	0.5	NUM
esrj-31427	47	37	1.5	1.5	NUM
esrj-31427	47	38	2.5	2.5	NUM
esrj-31427	47	39	distance	distance	NOUN
esrj-31427	47	40	(	(	PUNCT
esrj-31427	47	41	km	km	NOUN
esrj-31427	47	42	)	)	PUNCT
esrj-31427	47	43	3.5	3.5	NUM
esrj-31427	47	44	4.5	4.5	NUM
esrj-31427	47	45	figure	figure	NOUN
esrj-31427	47	46	3	3	NUM
esrj-31427	47	47	.	.	PUNCT
esrj-31427	47	48	traveltime	traveltime	PROPN
esrj-31427	47	49	difraction	difraction	NOUN
esrj-31427	47	50	and	and	CCONJ
esrj-31427	47	51	traveltime	traveltime	NOUN
esrj-31427	47	52	reflection	reflection	NOUN
esrj-31427	47	53	curve	curve	NOUN
esrj-31427	47	54	for	for	ADP
esrj-31427	47	55	a	a	DET
esrj-31427	47	56	depth	depth	NOUN
esrj-31427	47	57	point	point	NOUN
esrj-31427	47	58	.	.	PUNCT
esrj-31427	48	1	inside	inside	ADP
esrj-31427	48	2	such	such	ADJ
esrj-31427	48	3	model	model	NOUN
esrj-31427	48	4	with	with	ADP
esrj-31427	48	5	linear	linear	ADJ
esrj-31427	48	6	variation	variation	NOUN
esrj-31427	48	7	of	of	ADP
esrj-31427	48	8	velocity	velocity	NOUN
esrj-31427	48	9	,	,	PUNCT
esrj-31427	48	10	the	the	DET
esrj-31427	48	11	ray	ray	NOUN
esrj-31427	48	12	trajectory	trajectory	NOUN
esrj-31427	48	13	is	be	AUX
esrj-31427	48	14	circular	circular	ADJ
esrj-31427	48	15	and	and	CCONJ
esrj-31427	48	16	the	the	DET
esrj-31427	48	17	traveltime	traveltime	NOUN
esrj-31427	48	18	is	be	AUX
esrj-31427	48	19	given	give	VERB
esrj-31427	48	20	as	as	ADP
esrj-31427	48	21	solution	solution	NOUN
esrj-31427	48	22	of	of	ADP
esrj-31427	48	23	the	the	DET
esrj-31427	48	24	integral	integral	ADJ
esrj-31427	48	25	(	(	PUNCT
esrj-31427	48	26	bleistein	bleistein	NOUN
esrj-31427	48	27	,	,	PUNCT
esrj-31427	48	28	1986	1986	NUM
esrj-31427	48	29	)	)	PUNCT
esrj-31427	49	1	i	i	PRON
esrj-31427	49	2	tan	tan	VERB
esrj-31427	49	3	(	(	PUNCT
esrj-31427	49	4	a~	a~	PROPN
esrj-31427	49	5	)	)	PUNCT
esrj-31427	49	6	i	i	PRON
esrj-31427	49	7	t=-in	t=-in	PROPN
esrj-31427	49	8	-in(b	-in(b	PROPN
esrj-31427	49	9	,	,	PUNCT
esrj-31427	49	10	bg	bg	PROPN
esrj-31427	49	11	)	)	PUNCT
esrj-31427	49	12	g	g	NOUN
esrj-31427	49	13	tan(a~	tan(a~	NUM
esrj-31427	49	14	)	)	PUNCT
esrj-31427	49	15	g	g	NOUN
esrj-31427	49	16	(	(	PUNCT
esrj-31427	49	17	3	3	X
esrj-31427	49	18	)	)	PUNCT
esrj-31427	49	19	being	be	AUX
esrj-31427	49	20	b	b	NUM
esrj-31427	49	21	,	,	PUNCT
esrj-31427	49	22	=	=	NOUN
esrj-31427	49	23	1	1	NUM
esrj-31427	49	24	+	+	CCONJ
esrj-31427	49	25	(	(	PUNCT
esrj-31427	49	26	g2p	g2p	PROPN
esrj-31427	49	27	+	+	NOUN
esrj-31427	49	28	2g(ji	2g(ji	NUM
esrj-31427	49	29	)	)	PUNCT
esrj-31427	49	30	/	/	SYM
esrj-31427	50	1	2cco	2cco	NUM
esrj-31427	50	2	.	.	PUNCT
esrj-31427	51	1	all	all	DET
esrj-31427	51	2	the	the	DET
esrj-31427	51	3	values	value	NOUN
esrj-31427	51	4	of	of	ADP
esrj-31427	51	5	this	this	DET
esrj-31427	51	6	result	result	NOUN
esrj-31427	51	7	are	be	AUX
esrj-31427	51	8	known	know	VERB
esrj-31427	51	9	;	;	PUNCT
esrj-31427	51	10	ii	ii	PROPN
esrj-31427	51	11	and	and	CCONJ
esrj-31427	51	12	e	e	NOUN
esrj-31427	51	13	,	,	PUNCT
esrj-31427	51	14	are	be	AUX
esrj-31427	51	15	the	the	DET
esrj-31427	51	16	circular	circular	ADJ
esrj-31427	51	17	trajectory	trajectory	NOUN
esrj-31427	51	18	and	and	CCONJ
esrj-31427	51	19	parameter	parameter	NOUN
esrj-31427	51	20	ray	ray	PROPN
esrj-31427	51	21	,	,	PUNCT
esrj-31427	51	22	respectively	respectively	ADV
esrj-31427	51	23	.	.	PUNCT
esrj-31427	52	1	computational	computational	ADJ
esrj-31427	52	2	examples	example	NOUN
esrj-31427	52	3	the	the	DET
esrj-31427	52	4	seismic	seismic	ADJ
esrj-31427	52	5	model	model	NOUN
esrj-31427	52	6	consists	consist	VERB
esrj-31427	52	7	of	of	ADP
esrj-31427	52	8	by	by	ADP
esrj-31427	52	9	a	a	DET
esrj-31427	52	10	curved	curved	ADJ
esrj-31427	52	11	reflector	reflector	NOUN
esrj-31427	52	12	bellow	bellow	VERB
esrj-31427	52	13	an	an	DET
esrj-31427	52	14	inhomogeneous	inhomogeneous	ADJ
esrj-31427	52	15	domo	domo	NOUN
esrj-31427	52	16	with	with	ADP
esrj-31427	52	17	constant	constant	ADJ
esrj-31427	52	18	gradient	gradient	NOUN
esrj-31427	52	19	velocity	velocity	NOUN
esrj-31427	52	20	medium	medium	NOUN
esrj-31427	52	21	,	,	PUNCT
esrj-31427	52	22	where	where	SCONJ
esrj-31427	52	23	the	the	DET
esrj-31427	52	24	near	near	ADJ
esrj-31427	52	25	surface	surface	NOUN
esrj-31427	52	26	velocity	velocity	NOUN
esrj-31427	52	27	is	be	AUX
esrj-31427	52	28	2.0	2.0	NUM
esrj-31427	52	29	kmls	kmls	NOUN
esrj-31427	52	30	(	(	PUNCT
esrj-31427	52	31	varying	vary	VERB
esrj-31427	52	32	with	with	ADP
esrj-31427	52	33	the	the	DET
esrj-31427	52	34	depth	depth	NOUN
esrj-31427	52	35	)	)	PUNCT
esrj-31427	52	36	,	,	PUNCT
esrj-31427	52	37	and	and	CCONJ
esrj-31427	52	38	its	its	PRON
esrj-31427	52	39	gradient	gradient	NOUN
esrj-31427	52	40	is	be	AUX
esrj-31427	52	41	1.25	1.25	NUM
esrj-31427	52	42	/	/	SYM
esrj-31427	52	43	s.	s.	PROPN
esrj-31427	53	1	the	the	DET
esrj-31427	53	2	shot	shot	NOUN
esrj-31427	53	3	position	position	NOUN
esrj-31427	53	4	is	be	AUX
esrj-31427	53	5	0.4	0.4	NUM
esrj-31427	53	6	km	km	NOUN
esrj-31427	53	7	on	on	ADP
esrj-31427	53	8	the	the	DET
esrj-31427	53	9	left	left	NOUN
esrj-31427	53	10	,	,	PUNCT
esrj-31427	53	11	with	with	ADP
esrj-31427	53	12	0.5	0.5	NUM
esrj-31427	53	13	km	km	NOUN
esrj-31427	53	14	and	and	CCONJ
esrj-31427	53	15	1.45	1.45	NUM
esrj-31427	53	16	km	km	NOUN
esrj-31427	53	17	for	for	ADP
esrj-31427	53	18	the	the	DET
esrj-31427	53	19	near	near	ADJ
esrj-31427	53	20	and	and	CCONJ
esrj-31427	53	21	far	far	ADV
esrj-31427	53	22	offset	offset	VERB
esrj-31427	53	23	,	,	PUNCT
esrj-31427	53	24	respectively	respectively	ADV
esrj-31427	53	25	.	.	PUNCT
esrj-31427	54	1	the	the	DET
esrj-31427	54	2	source	source	NOUN
esrj-31427	54	3	dominant	dominant	ADJ
esrj-31427	54	4	frequency	frequency	NOUN
esrj-31427	54	5	is	be	AUX
esrj-31427	54	6	about	about	ADV
esrj-31427	54	7	70	70	NUM
esrj-31427	54	8	hz	hz	NOUN
esrj-31427	54	9	,	,	PUNCT
esrj-31427	54	10	and	and	CCONJ
esrj-31427	54	11	the	the	DET
esrj-31427	54	12	sample	sample	NOUN
esrj-31427	54	13	interval	interval	NOUN
esrj-31427	54	14	is	be	AUX
esrj-31427	54	15	of	of	ADP
esrj-31427	54	16	2.0	2.0	NUM
esrj-31427	54	17	ms	ms	NOUN
esrj-31427	54	18	.	.	PROPN
esrj-31427	55	1	in	in	ADP
esrj-31427	55	2	the	the	DET
esrj-31427	55	3	figure	figure	NOUN
esrj-31427	55	4	2	2	NUM
esrj-31427	55	5	are	be	AUX
esrj-31427	55	6	represented	represent	VERB
esrj-31427	55	7	the	the	DET
esrj-31427	55	8	tracing	trace	VERB
esrj-31427	55	9	rays(lower	rays(lower	PROPN
esrj-31427	55	10	)	)	PUNCT
esrj-31427	55	11	and	and	CCONJ
esrj-31427	55	12	the	the	DET
esrj-31427	55	13	synthetic	synthetic	ADJ
esrj-31427	55	14	seismogram(upper	seismogram(upper	NOUN
esrj-31427	55	15	)	)	PUNCT
esrj-31427	55	16	for	for	ADP
esrj-31427	55	17	a	a	DET
esrj-31427	55	18	asymmetric	asymmetric	ADJ
esrj-31427	55	19	common	common	ADJ
esrj-31427	55	20	shot	shot	NOUN
esrj-31427	55	21	configuration	configuration	NOUN
esrj-31427	55	22	.	.	PUNCT
esrj-31427	56	1	the	the	DET
esrj-31427	56	2	seismic	seismic	ADJ
esrj-31427	56	3	data	data	NOUN
esrj-31427	56	4	is	be	AUX
esrj-31427	56	5	noise	noise	NOUN
esrj-31427	56	6	free	free	ADJ
esrj-31427	56	7	.	.	PUNCT
esrj-31427	57	1	in	in	ADP
esrj-31427	57	2	the	the	DET
esrj-31427	57	3	figures	figure	NOUN
esrj-31427	57	4	3	3	NUM
esrj-31427	57	5	and	and	CCONJ
esrj-31427	57	6	5	5	NUM
esrj-31427	57	7	we	we	PRON
esrj-31427	57	8	geofislca	geofislca	PROPN
esrj-31427	57	9	colomb	colomb	PROPN
esrj-31427	57	10	lana	lana	PROPN
esrj-31427	57	11	.	.	PROPN
esrj-31427	57	12	7	7	NUM
esrj-31427	57	13	,	,	PUNCT
esrj-31427	57	14	diciembre	diciembre	PROPN
esrj-31427	57	15	de	de	PROPN
esrj-31427	57	16	2003	2003	NUM
esrj-31427	57	17	have	have	VERB
esrj-31427	57	18	the	the	DET
esrj-31427	57	19	image	image	NOUN
esrj-31427	57	20	and	and	CCONJ
esrj-31427	57	21	depth	depth	NOUN
esrj-31427	57	22	migrated	migrate	VERB
esrj-31427	57	23	seismic	seismic	ADJ
esrj-31427	57	24	data	datum	NOUN
esrj-31427	57	25	,	,	PUNCT
esrj-31427	57	26	after	after	ADP
esrj-31427	57	27	appliying	appliye	VERB
esrj-31427	57	28	of	of	ADP
esrj-31427	57	29	the	the	DET
esrj-31427	57	30	diffraction	diffraction	NOUN
esrj-31427	57	31	stack	stack	NOUN
esrj-31427	57	32	operator	operator	NOUN
esrj-31427	57	33	to	to	ADP
esrj-31427	57	34	the	the	DET
esrj-31427	57	35	respective	respective	ADJ
esrj-31427	57	36	set	set	NOUN
esrj-31427	57	37	of	of	ADP
esrj-31427	57	38	input	input	NOUN
esrj-31427	57	39	seismic	seismic	ADJ
esrj-31427	57	40	data	datum	NOUN
esrj-31427	57	41	.	.	PUNCT
esrj-31427	58	1	it	it	PRON
esrj-31427	58	2	is	be	AUX
esrj-31427	58	3	important	important	ADJ
esrj-31427	58	4	to	to	PART
esrj-31427	58	5	note	note	VERB
esrj-31427	58	6	that	that	SCONJ
esrj-31427	58	7	the	the	DET
esrj-31427	58	8	proposed	propose	VERB
esrj-31427	58	9	algorithm	algorithm	NOUN
esrj-31427	58	10	provides	provide	VERB
esrj-31427	58	11	a	a	DET
esrj-31427	58	12	good	good	ADJ
esrj-31427	58	13	image	image	NOUN
esrj-31427	58	14	of	of	ADP
esrj-31427	58	15	the	the	DET
esrj-31427	58	16	target	target	NOUN
esrj-31427	58	17	reflector	reflector	NOUN
esrj-31427	58	18	,	,	PUNCT
esrj-31427	58	19	and	and	CCONJ
esrj-31427	58	20	it	it	PRON
esrj-31427	58	21	is	be	AUX
esrj-31427	58	22	able	able	ADJ
esrj-31427	58	23	to	to	PART
esrj-31427	58	24	be	be	AUX
esrj-31427	58	25	used	use	VERB
esrj-31427	58	26	for	for	ADP
esrj-31427	58	27	migrating	migrate	VERB
esrj-31427	58	28	seismic	seismic	ADJ
esrj-31427	58	29	data	datum	NOUN
esrj-31427	58	30	in	in	ADP
esrj-31427	58	31	constant	constant	ADJ
esrj-31427	58	32	gradient	gradient	ADJ
esrj-31427	58	33	velocity	velocity	NOUN
esrj-31427	58	34	media	medium	NOUN
esrj-31427	58	35	.	.	PUNCT
esrj-31427	59	1	conclusions	conclusion	NOUN
esrj-31427	59	2	in	in	ADP
esrj-31427	59	3	this	this	DET
esrj-31427	59	4	paper	paper	NOUN
esrj-31427	59	5	,	,	PUNCT
esrj-31427	59	6	was	be	AUX
esrj-31427	59	7	develop	develop	VERB
esrj-31427	59	8	and	and	CCONJ
esrj-31427	59	9	tested	test	VERB
esrj-31427	59	10	the	the	DET
esrj-31427	59	11	diffraction	diffraction	NOUN
esrj-31427	59	12	stack	stack	NOUN
esrj-31427	59	13	migration	migration	NOUN
esrj-31427	59	14	algorithm	algorithm	NOUN
esrj-31427	59	15	,	,	PUNCT
esrj-31427	59	16	applying	apply	VERB
esrj-31427	59	17	it	it	PRON
esrj-31427	59	18	to	to	ADP
esrj-31427	59	19	a	a	DET
esrj-31427	59	20	set	set	NOUN
esrj-31427	59	21	of	of	ADP
esrj-31427	59	22	common	common	ADJ
esrj-31427	59	23	-	-	PUNCT
esrj-31427	59	24	shot	shot	NOUN
esrj-31427	59	25	seismic	seismic	ADJ
esrj-31427	59	26	data	datum	NOUN
esrj-31427	59	27	,	,	PUNCT
esrj-31427	59	28	syntheticaly	syntheticaly	PROPN
esrj-31427	59	29	generated	generate	VERB
esrj-31427	59	30	by	by	ADP
esrj-31427	59	31	the	the	DET
esrj-31427	59	32	ray	ray	NOUN
esrj-31427	59	33	theory	theory	NOUN
esrj-31427	59	34	for	for	ADP
esrj-31427	59	35	a	a	DET
esrj-31427	59	36	constant	constant	ADJ
esrj-31427	59	37	gradient	gradient	NOUN
esrj-31427	59	38	velocity	velocity	NOUN
esrj-31427	59	39	medium	medium	NOUN
esrj-31427	59	40	.	.	PUNCT
esrj-31427	60	1	the	the	DET
esrj-31427	60	2	algorithm	algorithm	NOUN
esrj-31427	60	3	was	be	AUX
esrj-31427	60	4	tested	test	VERB
esrj-31427	60	5	providing	provide	VERB
esrj-31427	60	6	us	we	PRON
esrj-31427	60	7	a	a	DET
esrj-31427	60	8	good	good	ADJ
esrj-31427	60	9	image	image	NOUN
esrj-31427	60	10	of	of	ADP
esrj-31427	60	11	the	the	DET
esrj-31427	60	12	target	target	NOUN
esrj-31427	60	13	reflector	reflector	NOUN
esrj-31427	60	14	.	.	PUNCT
esrj-31427	61	1	this	this	DET
esrj-31427	61	2	result	result	NOUN
esrj-31427	61	3	is	be	AUX
esrj-31427	61	4	very	very	ADV
esrj-31427	61	5	important	important	ADJ
esrj-31427	61	6	in	in	ADP
esrj-31427	61	7	sense	sense	NOUN
esrj-31427	61	8	that	that	SCONJ
esrj-31427	61	9	the	the	DET
esrj-31427	61	10	proposed	propose	VERB
esrj-31427	61	11	algorithm	algorithm	NOUN
esrj-31427	61	12	is	be	AUX
esrj-31427	61	13	fast	fast	ADJ
esrj-31427	61	14	,	,	PUNCT
esrj-31427	61	15	stable	stable	ADJ
esrj-31427	61	16	and	and	CCONJ
esrj-31427	61	17	suitable	suitable	ADJ
esrj-31427	61	18	to	to	PART
esrj-31427	61	19	be	be	AUX
esrj-31427	61	20	used	use	VERB
esrj-31427	61	21	for	for	ADP
esrj-31427	61	22	true	true	ADJ
esrj-31427	61	23	amplitude	amplitude	NOUN
esrj-31427	61	24	depth	depth	NOUN
esrj-31427	61	25	migration	migration	NOUN
esrj-31427	61	26	.	.	PUNCT
esrj-31427	62	1	references	reference	NOUN
esrj-31427	62	2	bleistein	bleistein	NOUN
esrj-31427	62	3	,	,	PUNCT
esrj-31427	62	4	n.	n.	NOUN
esrj-31427	62	5	,	,	PUNCT
esrj-31427	62	6	1986	1986	NUM
esrj-31427	62	7	,	,	PUNCT
esrj-31427	62	8	two	two	NUM
esrj-31427	62	9	-	-	PUNCT
esrj-31427	62	10	and	and	CCONJ
esrj-31427	62	11	-one	-one	NUM
esrj-31427	62	12	-	-	PUNCT
esrj-31427	62	13	half	half	NOUN
esrj-31427	62	14	dimensional	dimensional	ADJ
esrj-31427	62	15	in	in	ADP
esrj-31427	62	16	-	-	PUNCT
esrj-31427	62	17	plane	plane	NOUN
esrj-31427	62	18	wave	wave	NOUN
esrj-31427	62	19	propagation	propagation	NOUN
esrj-31427	62	20	.	.	PUNCT
esrj-31427	63	1	geophysical	geophysical	ADJ
esrj-31427	63	2	prospecting	prospecting	NOUN
esrj-31427	63	3	,	,	PUNCT
esrj-31427	63	4	34	34	NUM
esrj-31427	63	5	,	,	PUNCT
esrj-31427	63	6	686	686	NUM
esrj-31427	63	7	-	-	SYM
esrj-31427	63	8	703	703	NUM
esrj-31427	63	9	.	.	PUNCT
esrj-31427	64	1	japsen	japsen	NOUN
esrj-31427	64	2	,	,	PUNCT
esrj-31427	64	3	p.	p.	NOUN
esrj-31427	64	4	,	,	PUNCT
esrj-31427	64	5	1993	1993	NUM
esrj-31427	64	6	,	,	PUNCT
esrj-31427	64	7	influence	influence	NOUN
esrj-31427	64	8	of	of	ADP
esrj-31427	64	9	lithology	lithology	NOUN
esrj-31427	64	10	and	and	CCONJ
esrj-31427	64	11	neogene	neogene	NOUN
esrj-31427	64	12	uplift	uplift	VERB
esrj-31427	64	13	on	on	ADP
esrj-31427	64	14	seismic	seismic	ADJ
esrj-31427	64	15	velocities	velocity	NOUN
esrj-31427	64	16	in	in	ADP
esrj-31427	64	17	denmark	denmark	NOUN
esrj-31427	64	18	:	:	PUNCT
esrj-31427	64	19	implications	implication	NOUN
esrj-31427	64	20	for	for	ADP
esrj-31427	64	21	depth	depth	NOUN
esrj-31427	64	22	conversion	conversion	NOUN
esrj-31427	64	23	of	of	ADP
esrj-31427	64	24	maps	map	NOUN
esrj-31427	64	25	.	.	PUNCT
esrj-31427	65	1	the	the	DET
esrj-31427	65	2	aapgb	aapgb	NOUN
esrj-31427	65	3	,	,	PUNCT
esrj-31427	65	4	77	77	NUM
esrj-31427	65	5	,	,	PUNCT
esrj-31427	65	6	n.	n.	NOUN
esrj-31427	65	7	2	2	NUM
esrj-31427	65	8	,	,	PUNCT
esrj-31427	65	9	194	194	NUM
esrj-31427	65	10	-	-	SYM
esrj-31427	65	11	211	211	NUM
esrj-31427	65	12	.	.	PUNCT
esrj-31427	66	1	schleicher	schleicher	ADJ
esrj-31427	66	2	,	,	PUNCT
esrj-31427	66	3	1	1	NUM
esrj-31427	66	4	.	.	NUM
esrj-31427	66	5	;	;	PUNCT
esrj-31427	66	6	tygel	tygel	NOUN
esrj-31427	66	7	,	,	PUNCT
esrj-31427	66	8	m.	m.	NOUN
esrj-31427	66	9	;	;	PUNCT
esrj-31427	66	10	and	and	CCONJ
esrj-31427	66	11	hubral	hubral	ADJ
esrj-31427	66	12	,	,	PUNCT
esrj-31427	66	13	p.	p.	NOUN
esrj-31427	66	14	,	,	PUNCT
esrj-31427	66	15	1993	1993	NUM
esrj-31427	66	16	,	,	PUNCT
esrj-31427	66	17	3	3	NUM
esrj-31427	66	18	-	-	SYM
esrj-31427	66	19	d	d	ADJ
esrj-31427	66	20	true	true	ADJ
esrj-31427	66	21	-	-	PUNCT
esrj-31427	66	22	amplitude	amplitude	NOUN
esrj-31427	66	23	finite	finite	ADJ
esrj-31427	66	24	-	-	ADJ
esrj-31427	66	25	offset	offset	ADJ
esrj-31427	66	26	migration	migration	NOUN
esrj-31427	66	27	.	.	PUNCT
esrj-31427	67	1	geophysics	geophysic	NOUN
esrj-31427	67	2	,	,	PUNCT
esrj-31427	67	3	58(8	58(8	NUM
esrj-31427	67	4	):	):	PUNCT
esrj-31427	67	5	1820	1820	NUM
esrj-31427	67	6	-	-	SYM
esrj-31427	67	7	1830	1830	NUM
esrj-31427	67	8	.	.	PUNCT
esrj-31427	68	1	schneider	schneider	PROPN
esrj-31427	68	2	,	,	PUNCT
esrj-31427	68	3	jr	jr	PROPN
esrj-31427	68	4	.	.	PUNCT
esrj-31427	68	5	w.	w.	PROPN
esrj-31427	68	6	a.	a.	PROPN
esrj-31427	68	7	;	;	PUNCT
esrj-31427	68	8	ranzinger	ranzinger	NOUN
esrj-31427	68	9	,	,	PUNCT
esrj-31427	68	10	k.	k.	PROPN
esrj-31427	68	11	a.	a.	PROPN
esrj-31427	68	12	;	;	PUNCT
esrj-31427	68	13	balch	balch	PROPN
esrj-31427	68	14	,	,	PUNCT
esrj-31427	68	15	h.	h.	PROPN
esrj-31427	68	16	;	;	PUNCT
esrj-31427	68	17	and	and	CCONJ
esrj-31427	68	18	kuse	kuse	NOUN
esrj-31427	68	19	,	,	PUNCT
esrj-31427	68	20	c	c	NOUN
esrj-31427	68	21	,	,	PUNCT
esrj-31427	68	22	1992	1992	NUM
esrj-31427	68	23	,	,	PUNCT
esrj-31427	68	24	a	a	DET
esrj-31427	68	25	dynamic	dynamic	ADJ
esrj-31427	68	26	programming	programming	NOUN
esrj-31427	68	27	approach	approach	NOUN
esrj-31427	68	28	to	to	ADP
esrj-31427	68	29	first	first	ADJ
esrj-31427	68	30	arrival	arrival	NOUN
esrj-31427	68	31	traveltime	traveltime	NOUN
esrj-31427	68	32	computation	computation	NOUN
esrj-31427	68	33	in	in	ADP
esrj-31427	68	34	media	medium	NOUN
esrj-31427	68	35	with	with	ADP
esrj-31427	68	36	arbitrarily	arbitrarily	ADV
esrj-31427	68	37	distributed	distribute	VERB
esrj-31427	68	38	velocities	velocity	NOUN
esrj-31427	68	39	.	.	PUNCT
esrj-31427	69	1	geophysics	geophysic	NOUN
esrj-31427	69	2	,	,	PUNCT
esrj-31427	69	3	57	57	NUM
esrj-31427	69	4	,	,	PUNCT
esrj-31427	69	5	n.	n.	NOUN
esrj-31427	69	6	1,39	1,39	NOUN
esrj-31427	69	7	-	-	SYM
esrj-31427	69	8	50	50	NUM
esrj-31427	69	9	.	.	PUNCT
esrj-31427	70	1	urban	urban	ADJ
esrj-31427	70	2	,	,	PUNCT
esrj-31427	70	3	1.,1999	1.,1999	NUM
esrj-31427	70	4	,	,	PUNCT
esrj-31427	70	5	two	two	NUM
esrj-31427	70	6	-	-	PUNCT
esrj-31427	70	7	dimensional	dimensional	ADJ
esrj-31427	70	8	true	true	ADJ
esrj-31427	70	9	-	-	PUNCT
esrj-31427	70	10	amplitude	amplitude	NOUN
esrj-31427	70	11	migration	migration	NOUN
esrj-31427	70	12	and	and	CCONJ
esrj-31427	70	13	introduction	introduction	NOUN
esrj-31427	70	14	to	to	ADP
esrj-31427	70	15	2.5	2.5	NUM
esrj-31427	70	16	-	-	PUNCT
esrj-31427	70	17	d	d	NOUN
esrj-31427	70	18	case	case	NOUN
esrj-31427	70	19	.	.	PUNCT
esrj-31427	71	1	master	master	NOUN
esrj-31427	71	2	thesis	thesis	NOUN
esrj-31427	71	3	.	.	PUNCT
esrj-31427	72	1	federal	federal	ADJ
esrj-31427	72	2	university	university	PROPN
esrj-31427	72	3	of	of	ADP
esrj-31427	72	4	para	para	PROPN
esrj-31427	72	5	,	,	PUNCT
esrj-31427	72	6	brazil	brazil	PROPN
esrj-31427	72	7	.	.	PUNCT
esrj-31427	73	1	(	(	PUNCT
esrj-31427	73	2	in	in	ADP
esrj-31427	73	3	portuguese	portuguese	NOUN
esrj-31427	73	4	)	)	PUNCT
esrj-31427	73	5	.	.	PUNCT
esrj-31427	74	1	acknowledgments	acknowledgment	NOUN
esrj-31427	74	2	we	we	PRON
esrj-31427	74	3	would	would	AUX
esrj-31427	74	4	like	like	VERB
esrj-31427	74	5	to	to	PART
esrj-31427	74	6	thank	thank	VERB
esrj-31427	74	7	the	the	DET
esrj-31427	74	8	seismic	seismic	ADJ
esrj-31427	74	9	group	group	NOUN
esrj-31427	74	10	of	of	ADP
esrj-31427	74	11	the	the	DET
esrj-31427	74	12	geophysical	geophysical	PROPN
esrj-31427	74	13	institute	institute	PROPN
esrj-31427	74	14	,	,	PUNCT
esrj-31427	74	15	charles	charles	PROPN
esrj-31427	74	16	university	university	PROPN
esrj-31427	74	17	,	,	PUNCT
esrj-31427	74	18	prague	prague	PROPN
esrj-31427	74	19	,	,	PUNCT
esrj-31427	74	20	czechoslovakia	czechoslovakia	PROPN
esrj-31427	74	21	,	,	PUNCT
esrj-31427	74	22	for	for	ADP
esrj-31427	74	23	making	make	VERB
esrj-31427	74	24	available	available	ADJ
esrj-31427	74	25	the	the	DET
esrj-31427	74	26	ray	ray	NOUN
esrj-31427	74	27	tracing	trace	VERB
esrj-31427	74	28	software	software	NOUN
esrj-31427	74	29	seis88	seis88	NOUN
esrj-31427	74	30	,	,	PUNCT
esrj-31427	74	31	and	and	CCONJ
esrj-31427	74	32	the	the	DET
esrj-31427	74	33	universidad	universidad	PROPN
esrj-31427	74	34	nac10nal	nac10nal	PROPN
esrj-31427	74	35	de	de	X
esrj-31427	74	36	colombia	colombia	PROPN
esrj-31427	74	37	for	for	ADP
esrj-31427	74	38	supporting	support	VERB
esrj-31427	74	39	the	the	DET
esrj-31427	74	40	author	author	NOUN
esrj-31427	74	41	.	.	PUNCT
esrj-31427	75	1	73	73	NUM