@jpm@aus.social @fast_code_r_us@floss.social @Unixbigot@aus.social May I recommend a look at the SAM-M10Q? Its current consumption is on the order of 5-10mA in low-power and regular tracking modes respectively, and it has a multiband receiver and integrated antenna (generous keepout floodfill on the PCB forms an important element). Cold-start TTFF is around 30 seconds, which I think is fine for this application, though I can see why it would be prudent to do a DB-check/download while the device is being readied for logging a long journey.