id	keyword
esrj-55440	gravity
esrj-55440	geoid
esrj-55440	models
esrj-55440	ggms
esrj-55440	field
esrj-55440	data
esrj-55440	global
esrj-55440	earth
esrj-55440	grace
esrj-55440	champ
esrj-55440	height
esrj-55440	goce
esrj-55440	satellite
esrj-55440	gravity field
esrj-55440	levelling
esrj-55440	gnss
esrj-55440	values
esrj-55440	geopotential