RE: [Aus-soaring] GPS errors!

[Dav]

G’day all   The ABC radio news quoted the source as the  US military, acknowledging 2 crook satellites, which they were attempting to fix.  It may be done already. Who would know?   Todd is quite right about farmers having problems too that was also mentioned on the radio.   As  I remember these sats are in low earth orbit, as Mike says not geostationary, however the orbits are fixed so some (those which have a north south orbital path) differences would be present depending on location I guess.   Yeh Wayne I  couldn’t agree more about needing GPS in Adelaide. (-:   My friend is a recent immigrant from South Africa, we locals just look for the hills and know where we are!   Regards   Dave L       From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Geoff Kidd Sent: Tuesday, 13 June 2006 1:31 PM To: Discussion of issues relating to Soaring in Australia. Subject: Re: [Aus-soaring] GPS errors!   G'day Mike   I recall seeing details of expected GPS reduced accuracy given somewhere in the Aviation area forecasts each day or are they in some of the other notes?   Regards Geoff     ----- Original Message ----- From: Mike Borgelt To: Discussion of issues relating to Soaring in Australia. Sent: Tuesday, June 13, 2006 1:46 PM Subject: RE: [Aus-soaring] GPS errors!   At 01:36 PM 13/06/2006, you wrote: >Hmmm, >  I guess your in a different state Geoff, don't know enough about > GPS to comment-possibly SA is more affected due to orbits of sats involved?.. > > > >---------- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of Geoff Kidd >Sent: Tuesday, 13 June 2006 12:57 PM >To: Discussion of issues relating to Soaring in Australia. >Subject: Re: [Aus-soaring] GPS errors! > >Dave > >My Garmin in the car gave a worst accuracy of 8 m this morning and >was more like 6 - 7. > >Regards Geoff > > GPS sats are not in geostationary orbits so the bad sats will be visible everywhere over a day or two. The ground stations and control center can identify the bad ones in a few hours at most and either turn them off or switch to another transmitter and/or clock on the bad sat. Maybe someone at DSTO left a GPS jammer on by mistake or they are testing same? Normally this sort of thing is notified. Mike Borgelt Instruments - manufacturers of quality soaring instruments phone Int'l + 61 746 355784 fax   Int'l + 61 746 358796 cellphone Int'l + 61 428 355784            Int'l + 61 429 355784 email:   [EMAIL PROTECTED] website: www.borgeltinstruments.com _______________________________________________ Aus-soaring mailing list Aus-soaring@lists.internode.on.net To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring

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