For several days now, I observed a digital mode on 10489.645 MHz which might be a PSK or similar mode with two peaks. It seems to be an ARQ mode, as I observed small bursts in a FSK-like mode before and after longer transmissions, which might be confirmation or requesting data packets.
Does anyone know which mode and/or service might be operational on this frequency? So far I haven't found any information about this transmissions.
Thank you, 73