Isro plsv-c56 - 2023-07-30 01:01 utc

fredy · July 30, 2023, 9:14am

From PSLV-CA C56 - DS-SAR - FLP - 30 July 2023 (01:01 UTC) and
PSLV_C56_Mission_Brochure.pdf (8.2 MB) we have these:

Temporary NORAD ID	Satellite	Frequency	Notes	Deployed
COMMERCIAL UHF
99059	NuLIoN	401.500 MHz		Directly
AMATEUR UHF
99055	GALASSIA-2	436.400 MHz	IARU Coordinated	Directly
99056	VELOX-AM	437.125 MHz	IARU Coordinated	Directly
99057	SCOOB-II	437.500 MHz	IARU Coordinated	Directly
99058	ARCADE	437.760 MHz	IARU Coordinated	Directly
NO FREQUENCIES
-	ORB-12 STRIDER			Directly

Latest Update: 2023-07-30 09:15 UTC

fredy · July 30, 2023, 10:17am

I forgot to add TLE set that NuLIoN team shared with us and it is also used for the rest of the satellites:

NuLIoN
1 99059U 10793A   23211.05523148  .00000000  00000-0  38792-4 0    05
2 99059   4.8856 278.2466 0011634 185.0746 359.0067 15.10000000    03
ARCADE
1 99058U 10793A   23211.05523148  .00000000  00000-0  38792-4 0    04
2 99058   4.8856 278.2466 0011634 185.0746 359.0067 15.10000000    02
SCOOB-II
1 99057U 10793A   23211.05523148  .00000000  00000-0  38792-4 0    03
2 99057   4.8856 278.2466 0011634 185.0746 359.0067 15.10000000    01
VELOX-AM
1 99056U 10793A   23211.05523148  .00000000  00000-0  38792-4 0    02
2 99056   4.8856 278.2466 0011634 185.0746 359.0067 15.10000000    00
GALASSIA-2
1 99055U 10793A   23211.05523148  .00000000  00000-0  38792-4 0    01
2 99055   4.8856 278.2466 0011634 185.0746 359.0067 15.10000000    09

TLE set is adjusted to use the temporary NORAD ID for each satellite.

fredy · July 30, 2023, 10:17am

Probably reception of GALASSIA-2:

https://network.satnogs.org/observations/7940081/

fredy · July 30, 2023, 10:36am

After some analysis by @PE0SAT we have that the modulation is GOMspace AX.100 Mode 5 FKS1k2

and from one of the demodulated frames we have:

47414c41535349412d3200a5a5a5a5a5a5a5a5a5051d0512051e205d002d008f00110021001700000000003e0000004a000000000001000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000dff0008b6d10505000000000000000000000000000000000000000100080007000600060004000507030200000071007302000100000001b9fcd01c0239fd2f6b020075007a0007000001000000000000000000000000fc19fc19fc19fc19827f38a7

Where the first hex digits are translated to GALASSIA-2. So, we can confirm that this is the satellite.

fredy · July 30, 2023, 10:39am

Unfortunately due to the orbit of these satellites, we have limited passes and many of them are low elevation ones.

However we will continue to track them and try to generate TLE sets and identify them when they are catalogued.

fredy · July 30, 2023, 11:51am

From the first Galassia-2 observations we have this TLE set:

GALASSIA-2
1 99055U          23211.40000000  .00000000  00000-0  00000-0 0    04
2 99055   4.8856 280.5354 0011231 189.2325  65.7103 15.20284791    07

galassia_211.dat (210 Bytes)
sites.txt (2.8 KB)

Based on the above I’ve updated also the rest of the satellite TLE sets by adjusting the set above to the temporary NORAD IDs:

NuLIoN
1 99059U          23211.40000000  .00000000  00000-0  00000-0 0    08
2 99059   4.8856 280.5354 0011231 189.2325  65.7103 15.20284791    01
ARCADE
1 99058U          23211.40000000  .00000000  00000-0  00000-0 0    07
2 99058   4.8856 280.5354 0011231 189.2325  65.7103 15.20284791    00
SCOOB-II
1 99057U          23211.40000000  .00000000  00000-0  00000-0 0    06
2 99057   4.8856 280.5354 0011231 189.2325  65.7103 15.20284791    09
VELOX-AM
1 99056U          23211.40000000  .00000000  00000-0  00000-0 0    05
2 99056   4.8856 280.5354 0011231 189.2325  65.7103 15.20284791    08

fredy · July 30, 2023, 4:50pm

From more recent observations we have for NuLIoN:

NuLIoN
1 99059U          23211.60000000  .00000000  00000-0  00000-0 0    00
2 99059   4.8856 271.8799 0011442 186.8046  86.3140 15.10512481    03

sites.txt (2.8 KB)
nulion_211.dat (1.9 KB)

From the above analysis it looks like that NuLIoN has ~1.2KHz frequency drift.

fredy · July 30, 2023, 5:14pm

VELOX-AM is also received and decoded by @PE0SAT:

***** VERBOSE PDU DEBUG PRINT ******
((transmitter . 4k8 FSK AX100 ASM+Golay downlink))
pdu length = 71 bytes
pdu vector contents =
0000: 8a ac f2 00 58 44 41 54 00 0a 39 00 30 10 4b 10
0010: 0e 00 45 00 0e 0e 47 00 46 00 00 00 00 42 0d 09
0020: 3f 41 d4 5f d6 41 8d 04 5a ba 6b c6 0c bc 40 16
0030: 01 3b 13 b5 40 42 03 e8 b5 00 00 00 00 b7 4f c8
0040: 5d d5 c6 e4 2e 75 84

From the same observation here is a generated TLE set:

VELOX-AM
1 99056U          23211.60000000  .00000000  00000-0  00000-0 0    07
2 99056   4.8856 286.2759 0011259 191.3336  69.8576 15.10000692    00

veloxam_211.dat (280 Bytes)
sites.txt (2.8 KB)

fredy · July 30, 2023, 5:16pm

TLE sets for this launch by space-track.org, still in TBA status and still not for all objects:

0 TBA - TO BE ASSIGNED
1 57481U 23109A   23211.41847873  .00000886  00000-0  00000+0 0  9992
2 57481   4.9995 275.7023 0007847   8.6094 353.0053 15.11174876    57
0 TBA - TO BE ASSIGNED
1 57482U 23109B   23211.41966507  .00000898  00000-0  00000+0 0  9992
2 57482   5.0039 275.6202 0011127  12.6229 356.6021 15.11991539    55
0 TBA - TO BE ASSIGNED
1 57483U 23109C   23211.34332602  .00000905  00000-0  00000+0 0  9997
2 57483   4.9997 276.1987 0013415   7.9740 305.0286 15.12414615    46
0 TBA - TO BE ASSIGNED
1 57484U 23109D   23211.41486877  .00000880  00000-0  00000+0 0  9992
2 57484   5.0043 275.6603 0006560 341.0699   0.3856 15.10753608    53
0 TBA - TO BE ASSIGNED
1 57485U 23109E   23211.55779225  .00000893  00000-0  00000+0 0  9994
2 57485   4.9949 274.5372 0010275  11.7883  30.8210 15.11663994    75

fredy · July 30, 2023, 6:22pm

Status update:

Temporary NORAD ID	Satellite	NORAD ID to follow	Other NORAD IDs	Identified	Deployed	Last Update
RECEIVED AND DEMODULATED
99055	GALASSIA-2	57484	57481(unlikely)	NO	YES	Received and demodulated
99056	VELOX-AM	57482	-	NO	YES	Received and demodulated
RECEIVED
99059	NuLIoN	57484	57481(unlikely)	NO	YES	Received
NOT RECEIVED
99058	ARCADE	57485	all	NO	YES	Randomly chosen 57485 to follow
99057	SCOOB-II	57481	all	NO	YES	Randomly chosen 57481 to follow
NOT IN DB
-	ORB-12 STRIDER	-	-	NO	YES

adrian-nuspace · July 31, 2023, 4:39am

Hello everyone! Thanks for helping to track this launch!

We have a tracking station in Singapore and were working on Galassia-2’s pass using 57484. We could only obtain good connection between 10-30deg elevation, suggesting poor TLE. Will continue to track with different TLE and report back.

fredy · July 31, 2023, 8:09am

New TLE sets from space-track.org, some of the in TBA status:

0 OBJECT A
1 57481U 23109A   23211.77263348  .00000886  00000-0  00000+0 0  9990
2 57481   4.9985 272.9435 0008409  12.3518 121.3077 15.11155875   106
0 OBJECT B
1 57482U 23109B   23211.69788124  .00000898  00000-0  00000+0 0  9999
2 57482   5.0053 273.5142 0011278  16.1203  71.6576 15.11988407    92
0 OBJECT C
1 57483U 23109C   23211.69936272  .00000904  00000-0  00000+0 0  9997
2 57483   5.0009 273.4822 0013204  13.7638  83.1198 15.12416173    99
0 OBJECT D
1 57484U 23109D   23211.70069953  .00000881  00000-0  00000+0 0  9997
2 57484   5.0053 273.5008 0006823 356.8981 103.4064 15.10750417    95
0 TBA - TO BE ASSIGNED
1 57485U 23109E   23211.76891589  .00000893  00000-0  00000+0 0  9995
2 57485   4.9976 272.9708 0010139  15.1424  99.5413 15.11666312   106
0 TBA - TO BE ASSIGNED
1 57486U 23109F   23211.70251434  .00000879  00000-0  00000+0 0  9993
2 57486   5.0061 273.4089 0006679 357.2235 112.5913 15.10572641    95
0 TBA - TO BE ASSIGNED
1 57487U 23109G   23211.84005355  .00000874  00000-0  00000+0 0  9993
2 57487   5.0080 272.4641 0004488   3.0664 136.0329 15.10342699    65

We have in total 7 TLE sets, given that the payloads are 7 and the we also have the rocket body, we probably expect more sets.

fredy · July 31, 2023, 8:43am

Status update:

Temporary NORAD ID	Satellite	NORAD ID to follow	Other NORAD IDs	Identified	Deployed	Last Update
RECEIVED AND DEMODULATED
99055	GALASSIA-2	57486	57487(unlikely)	NO	YES	Changed to follow 57486, removed possible 57481, 57484, added to possible 57487
99056	VELOX-AM	57482	-	NO	YES	Waiting for all the objects to be published and assigned for identification
99059	NuLIoN	57484	57481(unlikely), 57486, 57487	NO	YES	Demodulated, added to possible 57486 and 57487
RECEIVED
-
NOT RECEIVED
99058	ARCADE	57485	all	NO	YES	Randomly chosen 57485 to follow
99057	SCOOB-II	57481	all	NO	YES	Randomly chosen 57481 to follow
NOT IN DB
-	ORB-12 STRIDER	-	-	NO	YES

adrian-nuspace · July 31, 2023, 1:04pm

We just attempted a pass for Galassia-2 with 57486. The pass was of decent quality throughout. Quite certain that 57486 is Galassia-2.

yd9ckh · July 31, 2023, 2:56pm

adrian-nuspace · July 31, 2023, 2:57pm

Based on observations here, we are starting to believe that 57487 is NuLIoN. Will continue to track NuLIoN with 57487 and report back.

adrian-nuspace · July 31, 2023, 2:59pm

Thats cool! Which TLE did you use to track it?

fredy · July 31, 2023, 4:42pm

Indeed running observation 7944094 through ikhnos looks like that 57487 is closer than the other candidates.

I’ve changed it in DB and Network.

yd9ckh · July 31, 2023, 10:51pm

this one

GALASSIA-2
1 57486U 23109F   23211.70251434  .00000879  00000+0  00000+0 0  9992
2 57486   5.0061 273.4089 0006679 357.2235 112.5913 15.10572641    95

adrian-nuspace · August 1, 2023, 2:38pm

Based on our attempts today, it does seem that our suspect of NuLIoN being 57487 seems to be quite accurate.