[time-nuts] A novel use of GPS multipath

[Tom Van Baak]

Hi Mark,

Here are a couple more novel and inspiring uses of GPS...

1) One can determine snow depth by monitoring the SNR of each SV:

    GPS Snow Depth
    http://xenon.colorado.edu/spotlight/index.php?action=kb&page=10

    GPS Snow Sensing
    http://xenon.colorado.edu/presentations/Chapman/SnowChapman.pdf


2) One can determine ocean or tide levels by using both a RHCP antenna looking up and a LHCP antenna looking down:

    GPS & Sea Level Case Study
    http://xenon.colorado.edu/spotlight/index.php?action=kb&page=67

    How does a GPS Tide Gauge work?
    http://xenon.colorado.edu/reflections/GPS_reflections/TideGauge.html

    The Accidental Tide Gauge: A GPS Reflection Case Study From Kachemak Bay, Alaska
    http://www.kristinelarson.net/wp-content/uploads/2015/10/LarsonIEEE_2013.pdf


3) One can use high-rate GPS as a seismometer:

    GPS & Earthquakes
    http://xenon.colorado.edu/spotlight/index.php?action=kb&page=46

    Observing Seismic Waves Using High-Rate GPS: The 2002 Denali Fault Earthquake
    https://www.unavco.org/community/publications_and_reports/proposals/2007/facility2007/section3/UNV-GRID-SPREAD-EC.pdf


/tvb