"Dave Tweed" expressed the following thought: "but it was still talking about intentions, not practice." I don't see where you can come to a conclusion like that when the document reference I cited uses phrases like "The GPS is a ..." and "GPS provides ..." and "The satellites transmit ..". These are statement of fact, not 'wish lists' or desires for system capabilities ... I suggest you do some research starting here: http://www.navcen.uscg.gov/gps/geninfo/default.htm Notably this document: 2001 GPS SPS Performance Standard Final (PDF) http://www.navcen.uscg.gov/gps/geninfo/2001SPSPerformanceStandardFINAL.pdf And this site: NAVSTAR Global Positionaing System Joint Program Office http://gps.losangeles.af.mil/ and notably this page: GPS Technical Library https://gps.losangeles.af.mil/gpsarchives/1000-public/1300-lib/default.html I think you will find that even stated INTENTIONS on an activity like GPS AREN'T very often VAPORWARE like 'product' touted by the loud-mouthed publicity-seeking hucksters in industry - these people who engineerind GPS/NAVSTAR are the same class 'brains' (the private contractors who do work for the DOD and NASA) that put men on the moon in the 60's and they are fully capable, indeed, they achive, their objectives. Costly, large-scale programs like NAVSTAR/GPS also take years to accomplish and were well-proven early-on with field trials. They aren't subject to the 'whims of marketing' as product from say, Intel, Microsoft or GM are - and programs like GPS/NAVSTAR are accomplished in stages after much study and due concern for every facet of operation. It *was* and still is a series undertaking ... And yes, the company I was with (we) built and tested receivers and we tested them at Yuma proving grounds on a 'range' when there were only a couple of NAVSTAR 'birds' in the air giving limited periods of coverage each day ... RF Jim ----- Original Message ----- From: "Dave Tweed" To: Sent: Saturday, November 23, 2002 11:58 AM Subject: Re: [OT]: (Report of) GPS anomalies > RF Jim wrote: > > I guess at this point you havn't read the bit I posted > > from a *much* more authoratative source than I ... > > Actually, I did, but it was still talking about intentions, not practice. > > > RF Jim (Veteran of GPS system work back in the late 70's) > > Interesting. Did you actually build and test receivers? > > -- Dave Tweed > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads