[IGSSTATION-7887] Re: Tracking of G04 with Septentrio receiver

[Nacho Romero]

Dear Rolf & Emilio,

Your recent message about Septentrio receiver indicates issues with the 
L1C tracking and some users have concluded that the L1C observables 
could be less precise than needed, on the other hand I think you mean 
that just tracking the new L1C signal of G04 with the affected receivers 
is affecting all other G04 observables.

Could you please confirm whether your concern is only about the L1C 
signal observables and what observables you used to check the MW linear 
combination ?

Am I correct in concluding that the upgrade of the PolaRx5 receivers to 
5.3.2 is recommended even if the observables of the L1C are not 
processed? ... because something (unknown?) is happening to the other L1 
observables?

Thanks again

Best regards,
Nacho
_______________________________________________________________

Ignacio (Nacho) Romero
Aerospace Engineer, PhD
CSC Ltd @ ESA/ESOC/OPS-GN
Satellite Navigation Engineer @ ESOC Navigation Support Office
IGS Infrastructure Committee Chair
www.navigation-office.esa.int
www.canaryspaceconsulting.co.uk
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On 18/02/2020 06:02, CODE AC team wrote:
> Dear colleagues,
>
> the new GPS Block IIIA is active as PRN G04 since a few months. We 
> have been concerned in our IGS processing because of a significantly 
> higher amount of observations that are indicated as "bad" for this 
> particular satellite.
>
> When digging down our colleague Emilio discovered that the 
> Melbourne-Wuebbena linear combination for this particular satellite is 
> more noisy than for other satellites for some stations (30 out of 
> 230). All these sites are equipped with a Septentrio receiver 
> (POLARX5*, firmware 5.3.x; see attached file).
>
> Interestingly, there is also a number of sites with the same 
> receiver/firmware (MAR6, SPT0, ONSA, QAQ1, SCOR, VIS0, KIR0, ABMF) 
> where the noise of the MW linear combination is in the usual range.
>
> Some discussions with Martin Lidberg (responsible for most of the 
> "working" receivers) and colleagues from Septentrio have shown:
> - tracking the new L1C signal with a Septentrio receiver is causing 
> these problems with the firmware versions 5.3.0 and 5.3.1
> - the installation of the firmware version 5.3.2 should solve this issue.
>
> Thank you for your consideration.
>
> Best regards
>
> Rolf & Emilio
> on behalf of the CODE AC
>
> PS: The analysis is done based on our database of 30-sec. RINEX2 and 
> RINEX3 files as used for IGS and EPN processing.
>
>
> _______________________________________________
> IGSSTATION mailing list
> IGSSTATION at lists.igs.org
> https://lists.igs.org/mailman/listinfo/igsstation
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