Accuracy with terrible HRMS

Discussion in 'Global Navigation Satellite Systems' started by Frank, Apr 6, 2015.

  1. Frank

    Frank Guest

    I am doing a large, backcountry survey for the SCDNR. A lot of the work is in deep valleys, with an HRMS of over 3. I need to have an accuracy of 2.5cm. I'm using L1 & L2C, and GPS & GLONASS. Would 30 minutes of post-processed raw data give me this kind of accuracy? If not, what length would be recommended?

    Frank Looper
    Frank, Apr 6, 2015
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  2. Frank

    Sam Wormley Guest

    Frank, don't you need a reasonably close reference marker, as most
    surveyors use.
    Sam Wormley, Apr 7, 2015
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  3. Frank

    Frank Guest

    I use an N TRIP caster that's 15 miles away, but in that deep valley, I can't get a fixed solution there, only autonomous or float fix. That's why I plan on recording 30 minutes of raw data, and process the RINEX file. Trimble RTX allows both GPS and GLONASS, as does CSRS-PPP and AUSPOS. I can also use GNSS Solutions on the desktop, and single-baseline process the RINEX file with the CORS site that's only 15 miles away. If I had two receivers, I could use one as a base, from a very close USES marker, but I can't yet afford another dual-frequency receiver.

    Any suggestions would be welcome.

    Frank, Apr 7, 2015
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