id	keyword
easat-9802	research
easat-9802	text
easat-9802	knowledge
easat-9802	aerospace
easat-9802	study
easat-9802	vol
easat-9802	unit
easat-9802	paper
easat-9802	results
easat-9802	authors
easat-9802	learning
easat-9802	structure