Dear Danny
In the data window of RTKNavi, I noticed the Lat/long/height of Base is
not listed with real numbers (90deg 0m). This isn't right- that GPS has a
fine solution in NMEA.
You have to set the base-station position properly in
Options dialog for relative modes. RTKNAVI never uses
receiver's NMEA.
This is FAQ. So I will add FAQ in the support page.
regards,
********
Tomoji TAKASU
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From: "Danny Miller" <[email protected]>
Sent: Monday, June 20, 2011 5:07 PM
To: <[email protected]>
Subject: [FOSS-GPS] Can't get Ambiguity Validation Ratio to move
I'm new to RTK. I have a pair of LEA-6T GPS units, one active Sarantel
SL-1206 quadrafiliar helix ant. There were supposed to be two of those
but the second one was DOA so I'm making do with an active patch antenna
for the second. I don't have an antenna file for either of them. I'm
using 2.4.1.
I have UBX RXM-RAW and RXM-SFRB reading out of both of them at 5Hz (tried
this at 1Hz too). I can get a fix out of either one of them. In
Kinematic mode of RTKNavi, I get a position, but the "ratio factor of
ambiguity validation" factor is stuck at 0.0. I waited like an hour and
it was still at 0.
In the data window of RTKNavi, I noticed the Lat/long/height of Base is
not listed with real numbers (90deg 0m). This isn't right- that GPS has a
fine solution in NMEA. Both Base and Rover are showing strong (~45dbHz)
signal bars in all colors.
I looked under Solution 1 and Solution 2 and both have valid, similar
solutions.
I looked under errors and saw:
eight "outlier rejected" per sample period (5Hz)
one "no double-differenced residuals" message
I tried switching the COM ports for Base and Rover, effectively switching
which unit was which (neither is moving right now). Nothing changed, the
"Base" unit channel still has no Lat/long/height and ambiguity validation
is still 0. That is, the problem is not tied to the GPS hardware unit.
I tried disabling the Rover in RTKnavi. There's still no solution under
the Lat/Long/Height of Base. The signal strength bars all turn gray.
I tried the mkl version (I have an i7). It didn't change anything.
I tried 2.4.0 rtknavi. In that one, I can't get a rover solution to show
up at all, it's blank on the main window and rtkplot shows nothing.
Any ideas?
Danny
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