Observation 1660975: OSCAR 7 (7530)

9v1rm · February 8, 2020, 11:42pm

Could that be Oscar 7 or is it man made noise 600-800s in ?

73’s Martin 9V1RM

9v1rm · February 9, 2020, 1:35am

flagged it as bad already.

K3RLD · February 10, 2020, 2:27pm

But it’s interesting that it’s perfectly straight, indicating that the frequency was changing during the observation and it perfectly matched AO-7’s doppler. I wouldn’t be so sure that this is “bad”, but I don’t know enough about AO-7 to make a call.

fredy · February 10, 2020, 2:50pm

By checking the rest of the good observations of the satellite I would say that it is a good observation.

vk5qi · February 10, 2020, 9:16pm

Yeah, I’m not really sure AO-7 transmits a reliable beacon signal anymore, but what it does transmit are bands of noise in the transponder output passband, exactly as seen in this observation. (You have to avoid them when working the linear transponder)

I’ve re-vetted it as good.

9v1rm · February 11, 2020, 3:20am

Hi

Thanks a lot ! Makes sense as I have 2 more Oscar 7 passes that looked exactly the same.

https://network.satnogs.org/observations/1675535/

https://network.satnogs.org/observations/1670076/

Best 73’s Martin 9V1RM