Dear All,
We are still not getting signal from ISTANBUL;s main beacon on 400 MHz, most probably we might have an issue with antenna deployment or the RTX module on OBC (OBS itself is alive).
As an emergency mode, after not being commanded from ground station, the satellite get into emergency beacon mode and transmitting TINY Beacon messages using its all transmitters, where the satellite has a 868 MHz LORAWAN beacon transmitter.
According to LORAWAN network we are getting signals from the satellite for the last 2 months on 868 MHz LORAWAN, but still no sign on 400 MHz.
We did an analysis on LORAWAN receptions from different LORAWAN gateways and we pretty sure ISTANBUL is Object BP.
I am attaching the analysis of last week to show how we came to conclusion that ISTANBUL is Object B.
I will be happy to hear your comments on this analysis, and also I would like to know what should be the next step to IDENTIFY and CLASIFY ISTANBUL satellite as Object BP on database/catalog.
Thanks
Baris DINC
OH2UDS/TA7W
ISTANBUL_HeliumNW_TLE analysis.pdf (635.5 KB)