I’m Rymansat menber. I made SatNOGS-decoreder with dl7ndr, deckbsd, fredy san.
No official comments from our team so far, but we’ve been discussing potential issues (e.g., battery charge state, antenna deployment). We’ll keep monitoring and share any findings.
We may have heard a very faint CW-like tone from RSP-03 around 14:15 JST (~05:15 UTC). The satellite sat for ~6 months after handover due to launch delays, so we’re concerned about battery state. Still analyzing—could anyone cross-check recent passes and see a narrow CW trace near the expected frequency?
Any short notes or a snippet of audio/IQ would help. Thanks!
We may have heard a very faint CW-like tone from RSP-03 around 14:15 JST (~05:15 UTC) .
Was it on a SatNOGS network obs ? or on your GS ?
If it is an antenna deployment issue, maybe at some point we could kindly ask our comrades from Dwingeloo Radio Observatory ( @fredy ) but from now it is probably too soon to jump to that conclusion.
Checking against other satellites that are supposed to transmit close to GHS-01 frequency, there was no fit. Given also the fact that observations are from different stations around the world make it very possible to be GHS-01.
I’m going to do some more checks and try to use these observations and see if I can get a TLE generated. In case we have a TLE, we are going to use it for all the satellites of this launch as it would be better from the current ISS one.
We may have heard a very faint CW-like tone from RSP-03 around 14:15 JST (~05:15 UTC) .
To clarify, these are still only carrier-like signals rather than confirmed beacon transmissions, so the identification as GHS-01 remains provisional. If a reliable TLE can be derived from them, however, it would greatly help not only for GHS-01 but also for RSP-03 and the rest of this deployment, as it would provide a better reference than continuing with the ISS TLE.
It looks like that the carrier like signal comes from GHS-01, also the TLE generated from some of them fit all of them perfectly, again given that we have different locations (so no random satellite that happened to pass over the same area twice) and that nothing else known near that frequency doesn’t fit, I’ll say that I’m 99% confident that we have signals from GHS-01.
So, here is the TLE generated for GHS-01 that we are going to use in SatNOGS DB:
As I said above we are going to use this TLE set for the rest of the satellites as it should fit better than the ISS TLE we use right now. So, here are all the TLE we are going to use for the satellites:
Seriously thought I had a strong signal from DragonFly over the Eastern U.S. tonight, but on replay-decode, turned out to be 9k6 BisonSat. An even stronger signal, possibly 1k2-something, was a little higher in freq. Was not able to decode that one.
I can’t tell - and the RF freq would have to be way off. But at this point, we have to consider things like that. Here’s an I/Q of the strongest of those packets… about 200k above the center (zero) of the recording (625000 sample rate, float32)
The signal seems to fit the ISS TLE but not the new ones we generated for GHS-01. The signal is at 437.081, instead of the 437.090 and it is very faint and not visible in other high pass observations at the same time. Also the signal looks like voice.
I’m not sure how to interpret this and in my mind run different scenarios:
The signal comes from ISS, then why is so faint and why in this unexpected frequency.
The signal comes from GHS-01, then why is so off (9KHz) and can we verify that digitalker is active at this phase of the satellite and set to transmit so long? In this case also what are the other carrier like transmissions that we couldn’t fit with any known satellite and we used them for generating TLE
The signal comes from a terrestrial source using ISS TLE, why someone could try that in the wrong frequency on a transmitter that it isn’t a repeater.
Anyway, let’s keep watching and see if we can get any similar reception.
By the way no other reception from GHS-01 or the rest has been achieved yet.
