[teqc] GLONAS SV ID 255 filter?

Robert Khachikyan robertk at jpl.nasa.gov
Wed Jan 31 12:01:44 MST 2018

Hi Lou,

This may be in the same umbrella of reports, but I have a similar 
situation when trying to remove a GLONASS satellite that is not within 
the range 1-24.

For instance, IGS station RAMO's daily 30-second RINEX file 
ramo3600.17o.Z downloaded from CDDIS has R26 observed. When issuing 
'teqc -R' to remove all GLONASS satellites, teqc throws an error of 
invalid slot number.

When removing it exclusively, "teqc -R26 -R", this works as expected.

If your fix will cover this report, I'll wait. Otherwise, is it possible 
for teqc not to do any quality checks on constellations when my intent 
is to remove them altogether?


On 01/12/2018 07:49 AM, Lou Estey wrote:
> hi Isaac,
> I'll try to get a fix to you as soon as possible for this.  (Now that 
> I know that
> u-blox firmware might put invalid SV IDs into UBX RMX-RAWX, I'm not 
> going to trust
> any ID value without validating it for the given constellation, so the 
> general fix
> needed in the two functions for reading UBX RMX-RAWX is going to 
> require a little
> thought).
> Your use of teqc with UBX on this base station will probably provide 
> pretty robust
> testing.  Just report anything else from teqc's parsing of UBX from it 
> that doesn't
> seem right.
> cheers,
> --lou
> On 12-Jan-18 08:33 AM, Isaac Hoyas Ester wrote:
>> Hi Lou,
>> That sounds great, if for whatever reason, now or in the future, you 
>> need ublox raw data let me know, I have a permanent base station 
>> (Ublox NEO-M8T receiver) so I can provide access to large quantities 
>> of ubx formatted files (1Hz by now).
>> Isaac
>> A 12.01.2018 04:20 PM, Lou Estey escrigué:
>>> My plan is to skip all SV information for any SV id in UBX RMX-RAWX 
>>> messages
>>> which is outside of the accepted norm for that constellation, i.e. 
>>> any such
>>> case would automatically be filtered out.  Up to this point, from 
>>> limited
>>> teqc-user feedback on UBX RMX-RAWX, there had not been any case of 
>>> SV ids
>>> outside of the accepted norm for any constellation.
>>> --lou
>>> On 12-Jan-18 08:11 AM, Isaac Hoyas Ester wrote:
>>>> Hi Lou, Excelent, I will certainly follow the instructions you are 
>>>> providing in the previous post and see how everything works out (I 
>>>> also have to check what happens with RTKLib behaviour) May I ask 
>>>> what rationale are you planning to implement in TEQC regarding 
>>>> R255s observations, personally I would like the option to 
>>>> completely eliminate (filter out) all those instances given the 
>>>> fact (please correct me if I'm wrong) there is no way to reliably 
>>>> assign a "proper" (is it 1 to 24?) slot number to those 
>>>> observations and this seems to be causing post processing issues 
>>>> within RTKLib Many thanks Isaac --- 
>>>> ===================================== Isaac Hoyas Ester Rokubun 
>>>> S.L. MediaTIC Bldg, 2nd floor Roc Boronat 117 08018 Barcelona. 
>>>> Spain http://www.rokubun.cat e-mail:isaac.hoyas.ester at rokubun.cat 
>>>> <mailto:isaac.hoyas.ester at rokubun.cat> phone:+34 935 511 490 
>>>> skype:isaac_h_e. =====================================
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