I’m kicking off the Astra LV0009. There are a few cubesat missions on this launch, some that I believe I am not allowed to name. The one most notably (to me) is OreSat0!
Here’s a starting point of details about OreSat. Feel free to contribute to this as well, I’m just kicking this off with the details I know for sure I’m allowed to share.
Astra LV0009 (S4 Crossover)
Launch Provider: Astra Space INC.
Approx Datetime: 20-03-2022 at around 1600 UTC RocketLaunch Live Link
CubeSat Missions:
OreSat0 (Portland State University)
“Hand-Crafted” and “Artisanal” cubesats by the Portland State Aerospace Society (PSAS)
Official Mission Statement: [T]o provide flight heritage to the “OreSat bus”, an open source card-cage based system that is ideally suited for education CubeSat projects involving interdisciplinary teams of students
i.e. don’t catch fire in space!
This is a tech demonstration/flight heritage mission and the first in hopefully a long line of future OreSat cubesats
ORESAT0 is now received! We had some observations earlier without decoded data that looked like ORESAT0 but now we have confirmed frames SatNOGS Network - Observation 5626461.
FYI, I had to do a lot of manual freq. adjustment using that last TLE on the 2225utc pass over the Eastern U.S. An omni antenna saved the day; my other SDR w/ a directional gain antenna got ZERO decodes w/ the AZ/EL tracking so far off. But thanks for posting to get us in the ballpark!
According to @EelkeVisser analysis while he was generating a TLE set, it looks like that 52010 is ORESAT0. However 52009 is also close, so we will wait for some more detailed analysis to make sure. Until then we use 52010 for following ORESAT0 in DB and Network.
20 TLE sets until now for this launch and all of the assigned to objects by spacetrack. From all of these 52012-52014 seems to be the better fits for now (thanks @EelkeVisser for the analysis), so we are going to use 52013 for the next hours/days in DB and Network.
The doppler difference is very small, and the objects are very close to each other. We are currently following 52013 for Oresat0, which is not bad, but 52014 might be a slightly better match. But due such small differences, this conclusion might change in the next few days. I’ll keep watching.
52014 or 52012? Looking at your frequency chart, 52012 has a smaller delta from transmission frequency. These differences are indeed very small. I imagine a higher transmission rate would help narrow it down.
Hi Kenny, it is not about the absolute frequency. I don’t know how accurate the sdr of this station is, and also the frequency of the satellite can be a bit off. If you look at the second column you find the rms error of the measured doppler points against the different objects. The 52014 has 0.163 kHz error and 52012 has 0.193 kHz. Hence the doppler of 52014 matches better with the measurements. All the objects are still flying very close to each other, it takes time for them to drift apart and make the doppler fit easier. Thanks for reaching out!
