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| -rw-r--r-- | TODO | 20 |
1 files changed, 20 insertions, 0 deletions
@@ -20,6 +20,26 @@ month is quite low. Consider merging the calibration draft into the Time Service HOWTO. +*** Time tracking + +Our goal is to be independent of the system clock. + +**** Compile the GPS week of the build into the build + +The obvious place tp put this is in timebase.h. Not too expensive; +will typically cause extra work once per seven days. The benefit is that +we can compare received week to the compiled in week and if the latter +is less know that a rollover has occurred. + +**** Track gpsd's confidence in the GPS time it's seeing + +This would increase when we see a leap-second offset or get GPZDA from +the device, decrease when we detect a rollover. Some devices that are +known to deliver high-quality time (notably u-blox GPSes) would peg the +confidence measure at a high level. We'd use the confidence level to +control (a) whether gpsd ships to NTP, and (b) how it sets time +uncertainty in output JSON. + *** Client bugs **** In gpsmon's PPS Offset field |