how to know north direction by gps data
asic1984 said:
hi
thanks too much bobcat1
my device can receive commands as it has a receiveing input RX
but the problem is that i donnot know the commands of NMEA that do that
i know only about the sentences format of the NMEA output from the GPS
and i didnot find any where commands in NMEA
can u guide me where to find them
and thanks too much for your support
im not sure if NMEA-protocol is implemente both direction in GARMIN
but if you need more than one position/sec you need using Garmin protocol
(you can find this on Internet) and my old GPS 12 XL can take out
5 positions every second.
garmin protocol is a peer to peer and working on
question -> answer, question-> answer... in timing grid of 1/10 sec exactly
(ie wait answer after question to a 1/10 sec anwer slot)
unfortly only on 9600 Baud out for garmin protocol
and long answer like positions can only give 5 answer/sec
depend of low token speed in serial interface
but short answer like time can give 10 answer/sec
I using Garmin exatly answer time interval to bulid time base
on useless timinghandling program like HP-VEE etc. for
synchronized RF-measure more than one place on same time
( uplink and downlink measure same time but different (moving) place)
(i really hate PC and windows and hp-vee usuless, timedrifting
and phase noising timing base...)
if you search on Internet you can find Linux-program with
source to interfacing Garmin and Garmin protocoll and pick
or learn how, from usable part of this.