christopher hoover wrote:
I wanted to have Heather make a RINEX file that could be submiited to
OPUS-GIS to get a more precise antenna location. The Tbolt does not
support carrier phase measurements. It does output doppler values.
The code phase (pseudorange) values that it outputs look to be VERY
difficult to translate into normal pseudoranges. You need to
calculate the satellite positions from the almanac, etc to be able to
use them.
OPUS-GIS is still in alpha testing mode. I don't know what observable
you need to have it post process the data.
What typically-available surplus receivers do carrier phase
measurements[1]? I'm close to putting up a choke ring antenna I scored
off of the surplus market on the roof -- I don't think the wife is going
to let me build a proper monument in the yard. :-) Hence, I, too,
am interested in getting a precise antenna fix. I 'spose I could hire
a surveyor, but that's cheating.
Considering that the monument should go clear of the house for the
antennas sky-view, I am sure that you are in good company with most of
us here and many nodes of reference station networks in using the
existing building rather than a fundament.
-ch
[1]. I did enough work w/surplus SuperStar receivers that I convinced
myself I could flash the carrier phase-capable software onto the board,
but that's stealing. I am interested in receivers where I can get
legitimate access to carrier phase measurements.
It depends, what if there is no commecial service available to get the
carrier-phase option?
There have been some work to build up a open-source code-base for GPS
receiver software.
But to answer the question, the CMC/Novatel series OEM boards, Motorola
and Ashtech receivers can all have carrier phase ability. However, the
carrier phase capable receivers is not easy to find.
Cheers,
Magnus
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