Re: GPS receiver with Raw Data Measurements

On 18 Jun 2006 23:22:09 -0700, "John" <google@xxxxxxxxxxxxxx> wrote:


trgraham wrote:
I have been doing all of the above with a Garmin GPS II+ and an ETREX
Legend, as well as the GPSMAP 72C. You will need to GOOGLE for Dennis
Milbert and check out "garbin" to log the data and "gl2rnx" for RINEX
conversion or you can check out Antonio Galan and get "async" to log the
data and "gar2rnx" to do the conversion to RINEX format. There is also a
package called Gringo the performs all of the logging and conversion.
You then need post-processing software to generate the accuracy you are
looking for. This is all explained in the above articles.
Have fun.
glion@xxxxxxxxxxxx wrote:
Hello Everyone!
I am trying to find a cheap GPS receiver, that will send to my
listening PC the actual measurements from the satellites
(phase measurements, pseudorange etc).
Specifically, i am interested in using the GPS measurements
to calculate my own GPS position.
I imagine a serial/usb device, that would send the data in ASCII
or smt format, so that i can easily utilize them
I tried to find something in the web, but i was able only to find
hack solutions (take a normal receiver, hack it down to isolate the signals,
connect them via a complicated hardware way to something in the PC)
Does anybody has something in mind?
Is there a product, i can plug in my PC, and have raw measurements on my screen?
MTIA
Grigoris Lionis

If you want to see how things work out in reality, there was an experiment
done using a Garmin GPS12 and RINEX from a nearby geodetic reference station
in the Netherlands. Read:
http://www.xs4all.nl/~atarist/geo/gps_accuracy.htm
Coming to the conclusion:
"When there is a good view of the sky, there are no obstacles blocking
reception for short times, more than 5 satellites in view all the time and the
observations have a timespan of 1 to 1 1/2 hour, then I expect with reasonable
confidence that my measured position will be within 20 cm of the real
position."

Piet
.

Relevant Pages

  • Re: Any suggestions for HO gradient? . . thanks for all the replys and information
    ... people who never did buy into the "Freedom Fries" mentality. ... I figure the metric system is good for the pointy-headed scientists who seem to prefer it, but for us ordinary folks, our "customary" measures suit me just fine. ... There's grains, carats, tons, US shortweight tons, tonnes and umpteen other weight measurements. ... Each of those, including the hundreds of traditional measurements I haven't mentioned, have irrational conversion factors to many of the ...
    (rec.models.railroad)
  • Re: Guidelines/checklist for reviewing code
    ... many possible sets of units depending on who was doing the measurements, ... We have routines to do such conversions, but not a single module. ... Having a number of conversion routines may not be ideal, but for our setup it's been working pretty well since before Fortran 77... ...
    (comp.lang.fortran)
  • Re: GPS receiver with Raw Data Measurements
    ... I have been doing all of the above with a Garmin GPS II+ and an ETREX Legend, as well as the GPSMAP 72C. ... You will need to GOOGLE for Dennis Milbert and check out "garbin" to log the data and "gl2rnx" for RINEX conversion or you can check out Antonio Galan and get "async" to log the data and "gar2rnx" to do the conversion to RINEX format. ... (phase measurements, pseudorange etc). ... hack solutions (take a normal receiver, hack it down to isolate the signals, ...
    (sci.geo.satellite-nav)
  • Re: Website to find Hazal Measurement
    ... > I am trying to find a conversion table on the website. ... > that can convert measurements such as Tefach, Agudal, Parsa, Zait, etc. ... and Feldheim is having their 20% off Chanukah sale. ...
    (soc.culture.jewish)
  • Re: GPS receiver with Raw Data Measurements
    ... I am trying to find a cheap GPS receiver, ... (phase measurements, pseudorange etc). ... hack solutions (take a normal receiver, hack it down to isolate the ...
    (sci.geo.satellite-nav)