TLE for INNOSAT3
INNOSAT3
1 98553U 25207.49956303 .00000000 00000-0 50000-4 0 07
2 98553 97.4100 171.9996 0008420 52.2001 355.5076 15.21424471 01
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tinyGS.com has added the 4 new objects from my work trying to locate & decode the new CSTP-4.x sats.
All 4 immediately started logging decodes from stations in the footprint!
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@geoscan How stable is the GEOSCAN-x LO, new observed value 435.972200 ?
My SDR isn’t GPS locked but the frequency difference I see at the moment is to much to be caused by the sdr LO.
GEOSCAN-1
1 98559U 25207.63245003 .00000000 00000-0 16318-2 0 09
2 98559 97.4100 173.0234 0016147 141.4184 269.7200 15.21985603 07
3 Likes
Frequency 436.163100
GEOSCAN-2
1 98558U 25207.56703300 .00000000 00000-0 24756-1 0 03
2 98558 97.4100 172.9467 0011560 49.4078 5.0868 15.22043063 02
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GEOSCAN-x LO should be not more than couple of kHz. I guess frequency values you provided might be actual and caused by medium
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Thanks for the update, I guess that is the reason why concatenating the data is problematic.
I will try to get better results but to be honest it is difficult.
Jan | PE0SAT
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Contacted the strf creator @cgbsat
At 436MHz, a 1000Hz offset corresponds to 0.7 km/s in velocity. Since that’s about 10% of orbital velocity I would think that will make TLE fitting infeasible.
But you can fit each curve separately and apply an offset to each.
Lets see if we can find an offset.
Jan | PE0SAT
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Ref. the CSTP-4.x satellites, after the tinyGS.com administrator added those objects to his database and decodes started coming in, he determined that the telemetry appeared to match up w/ the format seen in the CSTP-1.x & CSTP-2.x sats.
I thought it was cool to see the transition where he started applying the decoder to received frames:
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GNSS corrected TLE’s
INNOSAT16
1 98552U 25209.47340000 .00000000 00000-0 50000-4 0 07
2 98552 97.2801 175.9015 0009866 108.2683 295.3575 15.21172526 01
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These will not be perfect, the LO drift makes fitting difficult.
239ALFEROV
1 98560U 25210.14500129 .00000000 00000-0 22649+0 0 05
2 98560 97.2801 174.3136 0009866 108.2683 19.3901 15.24288825 07
GEOSCAN-1
1 98559U 25210.14518985 .00000000 00000-0 24746-2 0 05
2 98559 97.4100 175.0854 0011560 49.4078 78.2838 15.21244438 04
GEOSCAN-2
1 98558U 25210.14421699 .00000000 00000-0 11151-1 0 04
2 98558 97.4200 176.1508 0021954 111.1616 16.8002 15.23828294 06
GEOSCAN-3
1 98557U 25210.20804363 .00000000 00000-0 50000-4 0 02
2 98557 97.4100 177.8394 0011560 49.4078 71.7190 15.15409510 07
GEOSCAN-4
1 98556U 25210.20885421 .00000000 00000-0 12132+1 0 05
2 98556 97.4100 177.5378 0011560 49.4078 73.4358 15.16363346 07
GEOSCAN-5
1 98555U 25210.20885421 .00000000 00000-0 -13507+1 0 02
2 98555 97.4100 176.0247 0011560 49.4078 73.3481 15.14704834 00
GEOSCAN-6
1 98554U 25210.14525865 .00000000 00000-0 -28825-2 0 08
2 98554 97.4100 175.3038 0008420 52.2001 75.5472 15.21470362 06
INNOSAT3
1 98553U 25210.20834735 .00000000 00000-0 12477-1 0 07
2 98553 97.4100 175.2603 0008420 52.2001 70.1408 15.23624243 03
INNOSAT16
1 98552U 25210.21147922 .00000000 00000-0 -10476-1 0 00
2 98552 97.2801 176.7763 0009866 108.2683 14.1027 15.20057854 04
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Sorry, but it seems these are already pretty off
1 Like
INNOSAT16 new TLE
INNOSAT16
1 98552U 25211.73718750 .00000000 00000-0 50000-4 0 00
2 98552 97.4100 177.3817 0015621 342.3901 209.9746 15.19739116 03
1 Like
Confirming.
Gpredict also crashes for GEOSCAN-4 and -5 (with +1).
The other GEOSCAN TLEs (with -1) are working.
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A TLE for Geoscan-4, it may be not so accurate as it was produced using old observations:
GEOSCAN-4
1 98556U 25211.39511701 .00000000 00000-0 82229-4 0 01
2 98556 97.4100 177.0420 0014369 56.1820 83.7452 15.22104405 05
2 Likes
And one TLE for Geoscan-5, again it is not very accurate but it seems better that the one we have now:
GEOSCAN-5
1 98555U 25209.47968711 .00000000 00000-0 50000-4 0 05
2 98555 97.4200 173.1826 0016821 52.9234 38.4392 15.23975807 03
3 Likes
Better TLE’s for 239ALFEROV
239ALFEROV
1 98560U 25209.47548935 .00000000 00000-0 50000-4 0 03
2 98560 97.4200 179.1219 0022354 94.9108 329.0355 15.20786303 01
3 Likes
Updated TLE
INNOSAT16
1 98552U 25213.55310750 .00000000 00000-0 50000-4 0 00
2 98552 97.4100 179.1269 0015621 170.1161 240.5242 15.05926634 09
INNOSAT3
1 98553U 25213.48350990 .00000000 00000-0 50000-4 0 03
2 98553 97.4100 183.2665 0009200 93.8092 329.1810 15.20742872 08
GEOSCAN-6
1 98554U 25213.48291530 .00000000 00000-0 50000-4 0 08
2 98554 97.4200 175.1819 0021909 71.4167 332.8198 15.06426376 08
2 Likes
Were there successful observations after this TLE update for GEOSCAN-5?