Observation 764226: CAS-4A (42761)

Regarding Observation 764226 …this was marked Bad by @BOCTOK-1 and I was hoping to understand why. It looks like a faint signal from 200-280s and there’s a similarly faint band at -14 to -20 or so before 300s. This looks to match this observation which has much less noise than mine: https://network.satnogs.org/observations/764162/ and several others


I’ve just re-vetted the observation to good. You are right, I can spot the CW and the FSK signal a bit lower in frequency.

That is a very, very weak signal though (particularly for a high elevation pass), and CAS-4A is usually one of the easier sats to receive. What is your antenna/preamp situation, and how is your equipment installed?


Thanks for taking a look!

I have a Raspberry Pi 3 Model B+, RTL2832U and dipole antenna kit from rtl-sdr blog. I’m using the large antenna extended to 53cm mounted flush against a window. It’s currently in a V but oriented as a <. I was going to rotate it later today (does it matter?).

I have an SPF5189 but it’s not connected yet. Some power pin connectors are arriving on Monday.

Any advice would be greatly appreciated.

Thanks for catching this!

Having a big volume of observations to vet, sometimes, especially when
the signal is faint, I make mistakes on vetting.


No worries @BOCTOK-1 I appreciate the help and mostly just wanted to make sure I wasn’t misinterpreting something.


(Details above and I added to my profile)

Update: Digi-Key and USPS got the connectors here early and the SPF5189 seems to be making a difference :slight_smile:

Before: https://network.satnogs.org/observations/763095/
After: https://network.satnogs.org/observations/767181/

CAS-* won’t be coming back for a few hours, but NOAA’s comparison is encouraging.