For those of you interested in precision timing using non-GNSS satellites, Satelles and NIST jointly presented another paper at the recent PTTI meeting. "The long-term timing performance of Satellite Time and Location receivers using signals from Low Earth Orbit satellites" can be read at https://satelles.com/new-stl-research The paper describes meeting the ITU PRTC-A requirement of MTIE less than 100ns over long durations. Summarizing the disclaimer in the paper: NIST does not recommend or endorse any specific product or service. Cheers! --Stu