My station has been working for several weeks and I am trying to improve the quality of the received NOAA images. The power of the signal is changing during the pass and I can’t figure out why.
Looking at the waterfall the signal is lost around 140th second then after 300th second, the sidelines of the signal are lost. This is happening in all of my NOAA observations in different forms but in the end, I can’t get a clear image.
Also, there is a broadband noise from time to time. Any ideas what could be the source of this noise - something from my setup or something external and what can I do to remove it, it is present in all of my observations.
Looking at the decoded data - top side of the channel A image is completely white, any ideas why. This is also happening from time to time. I know that channel A image is changing from near-visible to mid-infrared depending on whether it is day or night but looking at other stations that are receiving good images I didn’t find such fully white images.
Again the signal is not consistent during the whole pass and there is a broadband noise.
I am using a commercial turnstile antenna TA-1 by Wimo, rtl-sdr v3 dongle and a raspberry 3. Do you think I need a LNA and maybe a filter?
Ivan / LZ2IPM