Hi All Here's a Riddle in the Sky... Apparently YUNHAI 1-02 [44547, 2019-063A] experienced a breakup around the Spring Equinox. https://twitter.com/18spcs/status/1374067474111500290 Spacetrack is tracking multiple DEB objects from the event. As of 2021-04-20T03:00 UTC there have been 22 DEB objects associated with the launch and the payload. Many of which just appearing over the past 3-4 weeks. A summary of the TLE behaviour since just prior to the 'breakup' event here: https://twitter.com/coastal8049/status/1383619077113978885 The story gets more interesting... Via twitter, I was pinged by L-band weather band decoder buffs, that YUNHAI 1-02 was claimed active on L-band on April 17. 2021. They are decoding encrypted data from an object that appears to correlate to YUNHAI 1-02 and that data recovery correlates to signals received prior to the reported breakup. I have received corroboration from other decoder/observers that the data seen from this object is consistent with YUNHAI 1-02. Summary of report here: https://twitter.com/aang254/status/1383381305245585418 Why do I trust the radio observation reports? Tracking is required to aim the fairly narrow beam antennas at the satellite to allow data decoding to work over a prolonged period of the pass. These are experienced data receivers familiar with tracking a satellite accurately within the requirements of their needs to decode the signal. Therefore, the report should be followed up with other third party observation to confirm claims. I haven't observed YUNHAI 1-02 myself on L-band or optically yet. If anyone wants to have a look at YUNHAI 1-02 optically that would be great. Radio observations would be welcome too. Both at the same time, magical. Goals of observations should be to: 1 - Confirm object ID. 2 - Determine light curve. Some consideration to monitoring and analysis of the DEB objects may be warranted. Regards, Scott Tilley _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Mon Apr 19 2021 - 23:01:00 UTC
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