Dear Friends, We are building a system with our high school team.
We used SDR# with an RTL-SDR dongle.
We used two antennae:
1 - The V dipole that came with the dongle kit.
2 - We built this QFH antenna. (ranch.com/how-to-build-a-qfh-quadrifilar-helix-antenna-to-download-images-from-weather-satellites/)
3 - We also used wideband LNAs for both.
For the most part, we followed advice that several of you generously gave to my July post.
We have not yet been able to convert data to image. We had a satellite pass directly overhead last Friday. The QFH had better signal than the V-dipole. We processed the data to the correct sampling rate in Audacity. But we think the signal strength might be too weak for WXtoIMG to convert to image.
What would the minimum signal strength in dB be to successfully convert an image?
Are there ways to increase signal strength?
Or perhaps we have a different problem somewhere in the chain…?