not found in two observation (29-12-2025):
14:15:03 UTC
15:46:21 UTC
but i will put here screenshot of the signal that seen same size between me and @pu4elt . i download the iq file of @pu4elt and replay on sdrpp.
same bandwidth around 2.19khz
2 Likes
These TLE sets changed to follow the temporary NORAD IDs we use in DB:
AIS 59
1 98444U 25363.41597223 .00000000 00000-0 00000-0 0 04
2 98444 97.5500 75.5372 0007850 196.3004 244.4298 15.20788259 09
Sitro-TD-4
1 98436U 25363.41597223 .00000000 00000-0 00000-0 0 05
2 98436 97.5498 75.5480 0014871 239.7734 201.7442 15.21063575 04
Luca-1
1 98449U 25363.41597223 .00000000 00000-0 00000-0 0 09
2 98449 97.5500 75.5424 0009698 232.0850 212.1977 15.20624573 05
DCS-1 (IoT-5)
1 98432U 25363.41597223 .00000000 00000-0 00000-0 0 01
2 98432 97.5518 75.5485 0007339 190.3845 251.3831 15.20994571 05
AIS 62
1 98441U 25363.41597223 .00000000 00000-0 00000-0 0 01
2 98441 97.5511 75.5451 0006477 136.4885 308.9139 15.22414496 03
AIS 64
1 98439U 25363.41597223 .00000000 00000-0 00000-0 0 08
2 98439 97.5504 75.5446 0009335 232.1777 213.2839 15.22332831 03
Zorkiy-2M VPE
1 98435U 25363.41597223 .00000000 00000-0 00000-0 0 04
2 98435 97.5503 75.5407 0010584 225.7072 220.0669 15.21188202 06
AIS 63
1 98440U 25363.41597223 .00000000 00000-0 00000-0 0 00
2 98440 97.5507 75.5449 0009129 232.9496 212.6270 15.22382168 08
Zorkiy-2m 5
1 98434U 25363.41597223 .00000000 00000-0 00000-0 0 03
2 98434 97.5502 75.5418 0008102 150.9842 294.3741 15.22266568 01
Sitro-TD-3
1 98437U 25363.41597223 .00000000 00000-0 00000-0 0 06
2 98437 97.5508 75.5483 0007180 190.0255 251.3405 15.21031393 05
AIS 65
1 98438U 25363.41597223 .00000000 00000-0 00000-0 0 07
2 98438 97.5527 75.5484 0015229 238.5776 203.1891 15.20969165 07
SAKHACUBE-CHOLBON
1 98450U 25363.41597223 .00000000 00000-0 00000-0 0 01
2 98450 97.5500 75.5425 0009699 232.0812 212.5883 15.20767184 03
AIS 58
1 98445U 25363.41597223 .00000000 00000-0 00000-0 0 05
2 98445 97.5497 75.5373 0008104 196.5454 244.8060 15.20768782 00
AIS 60
1 98443U 25363.41597223 .00000000 00000-0 00000-0 0 03
2 98443 97.5504 75.5371 0007663 196.3374 245.2823 15.20841630 09
AIS 61
1 98442U 25363.41597223 .00000000 00000-0 00000-0 0 02
2 98442 97.5515 75.5451 0006243 135.0639 310.8442 15.22440684 08
QMR-KWT-2
1 98448U 25363.41597223 .00000000 00000-0 00000-0 0 08
2 98448 97.5500 75.5424 0009698 232.0821 212.4503 15.20716664 03
Zorkiy-2M 7
1 98433U 25363.41597223 .00000000 00000-0 00000-0 0 02
2 98433 97.5508 75.5378 0007100 191.1809 250.6017 15.21051435 03
NASBSat-1
1 98431U 14087A 25362.66122685 .00000000 00000-0 00000-0 0 9999
2 98431 97.5502 74.7865 0006723 145.4221 129.8058 15.22283419000010
SITRO-AIS-57
1 98446U 14087A 25362.65607639 .00000000 00000-0 00000-0 0 9991
2 98446 97.5494 74.7763 0008345 198.4892 48.5477 15.20742974000013
SITRO-AIS-64
1 98439U 14087A 25362.66047454 .00000000 00000-0 00000-0 0 9997
2 98439 97.5504 74.7860 0006722 143.1496 127.9619 15.22347261000011
SITRO-TD-3
1 98437U 14087A 25362.65978009 .00000000 00000-0 00000-0 0 9993
2 98437 97.5508 74.7904 0007212 193.1938 74.1011 15.21047451000019
SITRO-AIS-58
1 98445U 14087A 25362.65758102 .00000000 00000-0 00000-0 0 9992
2 98445 97.5497 74.7776 0008104 199.1872 56.0778 15.20768726000019
Zorkiy-2M 5
1 98434U 14087A 25362.66521991 .00000000 00000-0 00000-0 0 9995
2 98434 97.5502 74.7879 0008090 153.8669 143.1983 15.22274995000011
NASBSat-2
1 98430U 14087A 25362.65642361 .00000000 00000-0 00000-0 0 9995
2 98430 97.5482 74.7733 0005950 152.5108 96.4298 15.22110850000017
DCS-1
1 98432U 14087A 25362.65850694 .00000000 00000-0 00000-0 0 9997
2 98432 97.5518 74.7892 0007371 193.5482 66.7837 15.21010713000019
SITRO-AIS-62
1 98441U 14087A 25362.65792824 .00000000 00000-0 00000-0 0 9997
2 98441 97.5511 74.7836 0006430 139.6959 117.4814 15.22431762000016
SITRO-AIS-60
1 98443U 14087A 25362.66012731 .00000000 00000-0 00000-0 0 9992
2 98443 97.5504 74.7798 0007681 199.2246 69.9650 15.20849973000011
SITRO-AIS-59
1 98444U 14087A 25362.65885417 .00000000 00000-0 00000-0 0 9991
2 98444 97.55 74.7787 0007890 199.3829 62.8443 15.20804039000012
SITRO-AIS-65
1 98438U 14087A 25362.65723380 .00000000 00000-0 00000-0 0 9994
2 98438 97.5527 74.7878 0007527 193.472 59.8969 15.20986783000013
SITRO-AIS-61
1 98442U 14087A 25362.65642361 .00000000 00000-0 00000-0 0 9998
2 98442 97.5515 74.7821 0006193 138.2731 110.6700 15.22458020000019
SITRO-TD-4
1 98436U 14087A 25362.66105324 .00000000 00000-0 00000-0 0 9995
2 98436 97.5498 74.7915 0007079 192.7628 81.4952 15.21085385000013
SITRO-AIS-63
1 98440U 14087A 25362.65920139 .00000000 00000-0 00000-0 0 9998
2 98440 97.5507 74.7848 0006598 141.2768 122.8677 15.22396034000014
7 Likes
The pair (at least!) of 62.5k LoRa transmitters continue to be decoded along the same orbit as KOSAR-1.5 (now UN-encrypted!), so it’s reasonable that they are likely from the 28-Dec launch.
I had made a mistake on the frequency of the 2nd object; now that that is corrected (to 436.175) in tinyGS, both objects are accumulating decodes when over populated areas:
5 Likes
To my simple analysis, 8 bits are 32 ms long.
This makes 250 bit/s.
The shift between mark and space is 2 kHz.
The preamble is about 5.2 sec long, then follows a 8 bytes syncword or so and then a 6.2 sec long payload.
There are no HDLC flags (0x7E) which means no AX.25.
I’ve tried MixW to decode it without success.
4 Likes
based on this tle, i try identified mysterious signal that @pu4elt and me got on 437.2 Mhz with strf tools, and best fitting satellite is 98441 - AIS 62
1 Like
Tried to track at the QMR-KWT 2 TLE on 03:41 UTC this morning and found these signals at around 436.850, 436.950, 437.200, 437.350. I
I’m not sure which satellite are these, maybe there should be more but I’m using highly directional antenna and the satellite may outside the antenna coverage
Edit:
Ooh, maybe its the AIS satellites 
2 Likes
no mysterious signal there. the mysterious signal should seen like a double line and continues signal on waterfall,
i also make obs on 02:09-02:17 UTC, and the mysterious signal not found:
1 Like
On a related note to bali’s last post, I am seeing these 62k5 LoRa packets spread all through the 436/437 MHz spectrum. I have a feeling that we’re going to find over time that a significant number of the sats from this launch are equipped with LoRa transmitters using all the same settings, differing only by RF freq.
And… seeing that the sonic.space site had marked AIST-ST as ‘active’, I found in their documentation a reference to 62k5 LoRa on 436.995 MHz. After recording tonight’s pass centered on 436.995 and determining the remainder of the LoRa parameters, I was able to decode most of the 1-minute interval frames centered quite neatly on AIST-ST’s frequency. I’ve submitted my findings to tinyGS in case they would like to add it as an object for that network to track.
2 Likes
update tle for galapagos @fredy
galapagos-2025-12-30-obs-v1.dat (504 Bytes)
galapagos-2025-12-30-v1.txt (150 Bytes)
sites.txt (1.1 KB)
GALAPAGOS
1 98428U 14087A 25364.19658490 .00000000 00000-0 30000-3 0 02
2 98428 97.5500 74.9070 0006729 146.6344 243.7599 15.22247693 08
3 Likes
SCORPION TLE Update
SCORPION
1 98427U 14087A 25364.47632161 .00000000 00000-0 00000-0 0 03
2 98427 97.5500 77.2849 0006729 146.6344 341.5638 15.21132956 02
# 20251229.80-20251230.48, 31 measurements, 0.178 kHz rms
Jan | PE0SAT
5 Likes
LOBACHEVSKY TLE Update
LOBACHEVSKY
1 98429U 14087A 25364.47673488 .00000000 00000-0 00000-0 0 02
2 98429 97.5500 77.0231 0006729 146.6344 341.9764 15.20712023 09
# 20251229.80-20251230.48, 40 measurements, 0.106 kHz rms
Jan | PE0SAT
5 Likes
QMR-KWT-2 TLE Update
QMR-KWT-2
1 98448U 14087A 25364.47669378 .00000000 00000-0 00000-0 0 06
2 98448 97.5500 76.9075 0006729 146.6344 343.0457 15.20968241 01
# 20251229.80-20251230.48, 46 measurements, 0.050 kHz rms
Jan | PE0SAT
7 Likes
Please correct SCORPION Transmitter AFSK 1k2 (not 1k143)
6 Likes
Vlad, I’ve been scanning for the LoRa downlink from PU-6 on 436.350 since the launch with nothing heard. Are you seeing signals from that satellite? Thanks!
I didn’t look. But the observations show signals:
Thanks!! I will record w/ an SDR tonight - perhaps I guessed some incorrect LoRa parameters.
1 Like
Sorry for all the LoRa posts, but we can’t control what these sats are transmitting & if nothing else just the presence of ANY type of signal at all lets us know that half these 28-Dec objects aren’t “dead”.
Tonight I made an I/Q recording centered on 436.350 looking for anything (LoRa or otherwise) from Polytech Universe 6. Nothing was seen on that freq, but up on 436.550 there was a perfect 62.5k LoRa signal:
… which decodes as follows:
… since I don’t know what a good frame from PU-6 should look like, I have no idea if this is a PU-6 downlink 200 kHz higher than expected, or if it’s “yet another” of these 28-Dec satellites showing up w/ a LoRa downlink.
I have not found any listing for ‘anything’ on 436.550 from this deployment, but I could easily miss something. Please let me know if anyone spots documentation of an object that is supposed to be on 436.550 (assuming it’s not PU-6 way off-freq).
Thanks!
(I’m aware that Polytech Universe 3 is on 436.550, but it was not near me during this pass & has a different payload. All these 62k5 LoRa signals that we’re seeing from this 28-Dec launch have similar formats)
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