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Posted by Randy on August 30, 2017 at 2:04pm in Professional Advice for New Surveyors
Why does it get better quicker fixes before noon? So it seems.It is old equipment. If I could get a fix in the morning in the woods , I come back afternoon... I'm not able to get a shot in a covered area.I'm new to surveying... maybe it's simple question?
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  • Kevin D. Allen August 30, 2017 at 2:47pm

    Two words... Satellite Orbits ..... 

    Have you ever done what we "old school" GPS users had to do? Mission Plan?  There are (or were)  typically two times a day when you should be getting a coffee and a doughnut (short break) and getting a steak and a beer (loong break).   The orbits are shifting all the time and even with multiple constellations of GPS satellites we have today,  you can have periods of "bad" GPS coverage.

    Check with your GPS equipment supplier or manufacturer and ask to be shown how to do this with your GPS post processing software... 

    Kevin

  • Land Surveyor
    J. Anthony Cavell August 30, 2017 at 2:42pm

    Reandy,

    It is a simple questions with complex answers. the constelations move during the day on an approximate 12 hour schedule. the trees are never a good place to trust satellite positions. Perhaps at one time they contained more moisture than the other. Under cover simply moving a few feet can make a tremendous difference.

    JAC

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