[IGSMAIL-1393] GPS Time Series, Positions, and Velocities

Michael Michael
Fri Jul 19 18:37:53 PDT 1996


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IGS Electronic Mail      Fri Jul 19 18:37:53 PDT 1996      Message Number 1393
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Author: Michael B. Heflin
Subject: GPS Time Series, Positions, and Velocities

Time series, positions, and velocities in Southern California and around the
world have been updated through June 15, 1996.  The longest time series span
5.5 years starting January 22, 1991.  Results for more than 150 sites based on
more than 70,000 station-days of GPS data are available via internet at URL:

http://sideshow.jpl.nasa.gov/mbh/series.html

Several sites in Southern California now have data spanning one year; an
important milestone in the determination of reliable velocities.  Most sites
are performing well and current results already indicate significant velocity
gradients in some areas.  No significant non-linear effects have been observed
except for post-seismic motion at JPLM after the Northridge earthquake and
several discontinuities due to equipment changes.  New global sites continue
to improve the sampling of major plates.  Please take some time to browse
through a few time series and send any comments you may have.


[Mailed From: mbh at cobra.jpl.nasa.gov]



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