SOPAC troposphere product area

Locating IGS data, products, and format definitions	Key to directory and file name variables
	d	day of week (0-6)	ssss	4-character IGS site ID or 4-character LEO ID
	ddd	day of year (1-366)	ww	2-digit week of year(01-53)
	hh	2-digit hour of day (00-23)	wwww	4-digit GPS week
	h	single letter for hour of day (a-x = 0-23)	yy	2-digit year
	mm	minutes within hour	yyyy	4-digit year
	leo	name of low-earth orbiting satellite
Software to uncompress files ending in .Z is available from http://www.gzip.org
(This will assist you in locating and using IGS data and products. It is not an exhaustive compilation of all files and directories available at the Data Centers)