NOAA on my station. (41-Chicago1)

Satellites & Observations
1

My station has been receiving NOAA APT images for a while now. I just now noticed that looking across them images from different observations I can see static lines that line up with each other. To me this means that the lines are from an obstetrical between me and the satellite.

Example Obs
https://network.satnogs.org/observations/123056/
https://network.satnogs.org/observations/123860/
https://network.satnogs.org/observations/122531/
https://network.satnogs.org/observations/133614/
https://network.satnogs.org/observations/132667/

Sort of neat. Might try an experiment to map whats blocking it. xD

2

It could be nulls in the antenna pattern.

3

Could be also. I have found it to change depending on the way the sat passes over head. I might investigate that too.