NTP PPS. Hey Paul I'm currently using the custom kernel on the Raspbian distribution.
I just connected an external GPS antenna to my Adafruit GPS receiver, so that might further improve the jitter (although I don't think ntpd can go below 0.002?) NMEA data. Table of Contents Disclaimer This site is based on personal research and is believed to be accurate but there is no guarantee that any of the information is correct or suitable for any purpose.
I have been told by the NMEA folks that my information is old and out of date. The current version of NMEA at the time I wrote this is 3.01 which is not described here. Interfacing with a Navman B10 GPS (aka GPSlim236)