Maybe little bit off-topic in this list, but any of you have tried gpstk (
http://www.gpstk.org/bin/view/Documentation/WebHome)?
I'm trying to use it in combination with gps-sdr. I'll keep you updated on my progress!
BR,
Carles
On Sun, Aug 10, 2008 at 4:55 AM, Peter Monta
<address@hidden> wrote:
>From my knowledge all the semi-codeless tracking algorithms are heavily patented, and hence cannot be found in textbooks or in any open forum.
But the patents themselves contain pretty good descriptions of the techniques;
also there is this paper:
http://www.navcomtech.com/Support/Download/Optimum%20Semi-Codeless%20Carrier%20Phase%20Tracking%20of%20L2.pdf
which summarizes all the options and adds a soft-decision refinement to
Z-tracking. Some of the patents will expire pretty soon, probably before
L2C is fully usable.
There ought to be a fully open-source, geodetic-quality, dual-frequency (or
tri-frequency once we have L5, or quad- or quint-frequency once we have
Galileo and Glonass and accurate IGS orbits and clock ties for these other
GNSS systems), software receiver. I have no real connection with any of
this (just a hobbyist), but I'd enjoy having access to state-of-the-art timing
and survey solutions.
Finally snagged a dual-frequency antenna on Ebay a few weeks ago, so
only software sits between me and centimeter positioning and subnanosecond
UTC (or UTC(GPS) or UTC(IGS) anyway).