NanoPi NEO armbian notes

switch ntp for ntpsec (because ?? security, support, logging features, find that accuracy/feature comparison chart again)
use gpsd from git head, armbian/debian package is several versions/features behind
gpsd -r; missing from pkg version, probably a bad idea anyway since the neo6m rtc/batt is likely for fix/ephemeris and gps will send 1969 without sat lock
gpsd -G; not working to bind * instead of localhost, try in newer version -- need this for u-center access remotely from Windows

https://www.u-blox.com/sites/default/files/products/documents/u-blox6_ReceiverDescrProtSpec_%28GPS.G6-SW-10018%29_Public.pdf
per page 39 disable SBAS, other timepulse/timing tips
see if 'static' mode available on 6m or only T versions

chronodot ds3231 rtc tcxo with battery for initial time / no fix / no network situations

temperature logging /sys/class/thermal/thermal_zone0/temp
gpsd lock/snr logging: ??? think this was in ntpviz or 
maybe use trusty RRD tools for logging/graphing?