Forum Graphic GPS Dating station
Last update: March 30, 2023 19:10 UTC (33276df3b)
Table of Contents
Synopsis
Address: 127.127.37.u
Reference ID: GPS
Driver ID: GPS
Parallel Port: /dev/fgclocku
Description
This driver supports the Forum Graphic GPS Dating station sold by EMR company.
Unfortunately, sometimes FG GPS start continues reporting of the same date. The only way to fix this problem is GPS power cycling and ntpd
restart after GPS power-up.
After Jan 10, 2000 my FG GPS unit started sending a wrong answer after 10:00am till 11:00am. It repeated the hour value in result string twice. I wrote a small code to avoid such problem. Unfortunately I have no second FG GPS unit to evaluate this problem. Please let me know if your GPS has no problems after Y2K.
Monitor Data
Each timecode is written to the clockstats
file in the format YYYY YD HH MI SS
.
Fudge Factors
time1 time
-
Specifies the time offset calibration factor, in seconds and fraction, with default 0.0.
time2 time
-
Not used by this driver.
stratum number
-
Specifies the driver stratum, in decimal from 0 to 15, with default 0.
refid string
-
Specifies the driver reference identifier, an ASCII string from one to four characters, with default FG
.
flag1 0 | 1
-
Not used by this driver.
flag2 0 | 1
-
Not used by this driver.
flag3 0 | 1
-
Not used by this driver.
flag4 0 | 1
-
Not used by this driver.
Dmitry Smirnov