This file contains the rinex file name, the station name, the receiver type
and the status of Anti Spoofing. It can be created by the script
		/goa/bin/sta_rcvr_AS
It is used when constructing the ambigon namelist.

An example:
95jul13AOA1____0r.rnx.Z   AOA1      TURBOROGUE  AS_ON
95jul13JPLM____0r.rnx.Z   JPLM      TURBOROGUE  AS_ON
95jul13MATH____0b.rnx.Z   MATH      TRIMBLE_SSE AS_ON
95jul13TRAK____0a.rnx.Z   TRAK      ASHTECH_Z-12        AS_ON