The phase of the OCXO's PPS will need to be disciplined to GPS, otherwise your offline time reference will be a stable, low jitter, and wrong. Edit: I see you

The phase of the OCXO's PPS will need to be disciplined to GPS, otherwise your offline time reference will be a stable, low jitter, and wrong. Edit: I see you mean not feeding in PPS, only 10 MHz where phase doesn't matter. I didn't know Chrony supported that. You could also use a good reference multiplied to replace the Pi's clock. Gepetto's GPSDO has been tempting to me for a long time. I've just never had an application to justify the cost. https://www.tindie.com/products/nsayer/gps-disciplined-ocxo/ https://www.tindie.com/products/nsayer/gps-disciplined-ocxo/