Index of /corsdata/rinex/2021/172/echo

	Name	Last modified	Size	Description
	Parent Directory		-
	echo1720.21S	2021-06-22 05:32	60K
	echo1720.21d.gz	2021-06-22 05:32	1.5M
	echo1720.21o.gz	2021-07-23 14:31	3.6M