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Unicore reject GLO L2 freq #548

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juffe84 opened this issue Dec 19, 2024 · 4 comments
Open

Unicore reject GLO L2 freq #548

juffe84 opened this issue Dec 19, 2024 · 4 comments

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@juffe84
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juffe84 commented Dec 19, 2024

Hello.

I am trying to stream base station data to the caster and with strsvr I am do conversion from unicore to legacy rtcm3.0.
I cant get L2 signals with conversion. What is problem? I think so that 1085 conversion works fine, but I cant test it, because I dont have payed version of SNIP.
My settings:
CONFIG SIGNALGROUP 2
CONFIG UNDULATION 0
OBSVMB 0.5
GPSEPHB 5
GLOEPHB 5
BDSEPHB 5
GALEPHB 5
QZSSEPHB 5
IRNSSEPHB 5
BD3EPHB 5
image

@juffe84
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juffe84 commented Dec 20, 2024

Little bit of researching and I can get L2C code with option -RL2C. Cant get L2P code.

@ourairquality
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The current unicore driver does not include an entry for GLONASS L2P as the documentation has none. Was L2P expected to be supported?

@juffe84
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juffe84 commented Dec 20, 2024

Yes, I think so. If I set unicore to send rtcm 1012 message directly, then SNIP understand that it is L2P.
This is newest Commands reference manual, but there is still only 0,5,6,7. But I think so there is some difference with other satellite system and unicore.c
https://en.unicore.com/uploads/file/Unicore%20Reference%20Commands%20Manual%20For%20N4%20High%20Precision%20Products_V2_EN_R1.6.pdf

GLONASS:
0 = L1 C/A
5 = L2 C/A
6 = G3I
7 = G3Q

Edit:
Im not guru, but maybe signal numbers is:
image

And can get it from:
image

@ourairquality
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Thank you for the link to the v1.6 manual. There does not appear to be any G2P support in the observation messages. It does seem a little odd that RTCMSTATUS has a G2P entry, but perhaps it is an allocation for some variant. Did note support for two new QZSS signals and shall submit a PR to add decoder support for those.

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