[teqc] GLONASS navigation error

Lou Estey lou at unavco.org
Wed Jun 18 07:02:29 MDT 2008


hi Uwe,

> on day 168/2008 we found a difference in the GLONASS navigation file(s) created by Leica Spider
> Rinex Converter and teqc.
> 
> For the ephemeris epoch 16/6/08 00:15:00 the epoch time is recorded 00:15:60 for all satellites.
> This one minute difference causes a huge error in the position of the satellites resulting in a
> wrong position estimate.
> 
> teqc:
> 23 08  6 16  0 15 60.0-1.270640641451D-04 3.637978807092D-12 0.000000000000D+00
>     1.060660107422D+04 1.154708862305D-01-9.313225746155D-10 0.000000000000D+00
>    -3.738262207031D+03 3.132190704346D+00 0.000000000000D+00 3.000000000000D+00
>     2.290192138672D+04 4.613704681396D-01-1.862645149231D-09 0.000000000000D+00

> Leica Spider:
> 23 08 06 16 00 15  0.0-1.270640641451D-04 3.637978807092D-12 0.000000000000D+00
>     1.060660107422D+04 1.154708862305D-01-9.313225746155D-10 0.000000000000D+00
>    -3.738262207031D+03 3.132190704346D+00 0.000000000000D+00 3.000000000000D+00
>     2.290192138672D+04 4.613704681396D-01-1.862645149231D-09 0.000000000000D+00

> Because of the size, i do not want to attach the corresponding files.

That's a pretty interesting difference.  This just occurs on the one day?
If you still have the raw Leica data file, send that direct to me and
I'll try to figure out what's up.

cheers,
--lou

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Louis H. Estey, Ph.D.              office:  [+001] 303-381-7456
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