[time-nuts] Lady Heather 5.0 and COFS/Jupiter-T Receiver

[Mark Sims]

All the Zodiac messages use scaled integers for their values.  Lots of places for limited precision and round-off to sneak in...

When the survey completes, it goes to position hold mode.  The survey data area turns grey and shows the values the survey used as a reminder of how it got the position.  On a GPSDO with a configurable PLL,  the survey data area reverts to showing the PLL settings.