[teqc] GLONAS SV ID 255 filter?

Lou Estey lou at unavco.org
Thu Jan 11 16:00:39 MST 2018


Yes, that's right.  So 'R255' in an obs file means it breaks the RINEX specification.

--lou

> Out of curiosity, isn't the SV designation required to be exactly one letter and two numbers?
>
> Evon
>
> On Thu, Jan 11, 2018 at 8:08 AM, Lou Estey <lou at unavco.org <mailto:lou at unavco.org>> wrote:
>
>     Isaac,
>
>     Did teqc generate the RINEX file with 'R255', as shown below?
>
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>     Louis H. Estey, Ph.D.              office:  [+001] 303-381-7456 <tel:303-381-7456>
>     UNAVCO, 6350 Nautilus Drive <https://maps.google.com/?q=6350+Nautilus+Drive&entry=gmail&source=g>           FAX:  [+001] 303-381-7451
>     <tel:303-381-7451>
>     Boulder, CO  80301-5554            e-mail:  lou unavco.org <http://unavco.org>
>
>     "If the universe is the answer, what is the question?"
>                                                     -- Leon Lederman
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
>     On 11-Jan-18 09:04 AM, Isaac Hoyas Ester wrote:
>
>         Hello,
>
>         I have been trying to find instructions on how to use TEQC to filter out GLONASS observations with slot ID 255, this may happen because
>         the Ublox receiver that I'm trying to convert raw data from may be able to decode data from a GLONASS SV before it can identify the SV.
>         When this occurs UBX-RXM-SFRBX messages will be issued with an svId of 255 to indicate "unknown".
>
>         Here you have a RINEX observation epoch example showing a GLONASS SV with slot ID 255:
>
>         17 12 22 22 9 6.9940000 0 17G24G29G25G31G12G32R08R09G04G02R255R10
>         R19R20G14R18R16
>         117546916.037 <tel:117546916.037> 6 22368465.110 40.000 -3572.229
>         96793892.692 8 18419251.051 49.000 865.332
>         98761291.535 8 18793667.599 48.000 -530.120
>         108401382.976 7 20628091.097 44.000 2600.400
>         106915274.094 7 20345288.104 46.000 -2394.498
>         110635793.326 6 21053314.460 40.000 -2140.314
>         117523692.247 5 21946725.423 34.000 -1896.710
>         94773244.591 7 17748010.382 <tel:17748010.382> 46.000 1014.036
>         114537730.343 5 21795793.846 34.000 2758.222
>         113756995.669 7 21647232.534 42.000 -1099.824
>         108373678.553 7 20316337.163 43.000 4082.983
>         111241066.317 6 20868543.848 36.000 3423.625
>         93974283.751 7 17567507.189 45.000 580.784
>         108749564.993 6 20336700.814 37.000 4121.685
>         108824714.448 6 20708650.009 40.000 -573.414
>         104444377.513 6 19565957.947 <tel:19565957.947> 40.000 -3400.356
>         102423064.459 6 19173840.114 <tel:19173840.114> 40.000 -2393.646
>
>         Many thanks for your support.
>
>         Best Regards
>
>         Isaac




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