Hobby Projects:
KIWI OSD - Video overlay of precision  timestamps, using GPS with 1PPS
KIWI - Millisecond accurate timestamp utility, using a PC and GPS with 1PPS
TLOG and MLOG  -  Using a PC as a Logging Thermometer
GPS_SKY  -  map your GPS Horizon software
GPS  Almanac to Orbital Position software
GPS  Almanac to TLE software
55 Thousand NZ place names in GPX format
Using "Hat Size" to find the Speed of Light
NZ Aviation VRP's in GPX format
GPS, Time Metrology, Software development
Mapping Asteroid Shadow Paths