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#1
posted to rec.boats.cruising
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WAAS GEO Satellite going down - bad news for users of GPS devices
The Federal Aviation Administration (FAA) announced (on April 30) that
one of the two WAAS GEO satellites will drift out of usable orbit within two to four weeks. Earlier on April 8th, Intelsat announced it had lost control of its Galaxy 15 satellite that hosts the WAAS SBAS transponder used by the FAA. The FAA says it is monitoring the satellite, but that failure is imminent (by mid-May 2010). When G-15 is out of usuable orbit, WAAS will be disrupted for users in northwest Alaska. The rest of the WAAS service area — U.S., Canada, Mexico — will operate normally but will be reduced to a single point of failure with only one WAAS broadcasting Anik F1R satellite remaining (PRN #138/ NMEA#51). The impending failure of this satellite—which only affects WAAS signals —comes at a time when there are questions about the regular GPS constellation. The U.S. Government Accountability Office has said that many of the older satellites currently in use could reach the end of their operational life faster than they can be replenished, resulting in a drop below the number of satellites needed to meet some GPS users’ needs, as early as this year. http://blog.geogarage.com/2010/04/wa...oing-down.html |
#2
posted to rec.boats.cruising
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WAAS GEO Satellite going down - bad news for users of GPS devices
cvj wrote in news:af2e12d7-23af-4ac9-90f2-
: many of the older satellites currently in use could reach the end of their operational life faster than they can be replenished, Now, what the hell did I do with those sight reduction tables.....?? -- Creationism is to science what storks are to obstetrics. Larry |
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