I am planing a CubeSat experiment based on SDR for WSPR signal transmission, with a focus on studying Es layer propagation. Specifically, I am interested in conducting WSPR experiments in LEO, focusing on the 6m band or. I would appreciate any suggestions you have regarding the ideal concept for the experiment, including the band, RF power, antenna, and WSPR functionality. If you have any previously referenced materials or experience with this type of experiment, please share them. I also welcome you to join me in developing the next CubeSat payload for an amateur satellite.