21:20:53> "Nathaniel W2NAF": Russian School of Geomagnetic Pulsations: < https://drive.google.com/file/d/1a5mGLbELphzl4K5xbgiwU4DIRdkhwyW1/view?usp=sharing > 21:42:12> "Nathaniel W2NAF": < https://tangerinesdr.com/TangerineSDR_documents/TangerineSDR%20RF%20Module%20Specification%20V0.1.pdf >