Thread: NASA MEaSUREs Project: GNSS & Seismogeodetic Data Products, please post

Started: 2022-07-13 13:14:46
Last activity: 2022-07-13 13:14:46
NASA MEaSUREs Project: GNSS & Seismogeodetic Data Products



Dear colleagues,



We would like to update you on SIO's and JPL's NASA MEaSUREs ES3 project,
now in its third five-year cycle. We publish 4 levels of data products
building upon our daily displacement time series from a combination of JPL
and SIO GNSS solutions using common metadata from the SOPAC database.



The daily time series and metadata can be viewed, coupled with a map
interface, on MGViz, our new single-screen user application:
http://MGViz.ucsd.edu http://MGViz.ucsd.edu.



Our products are archived at SOPAC:

http://garner.ucsd.edu/pub/measuresESESES_products/
http://garner.ucsd.edu/pub/measuresESESES_products/

and CDDIS: https://cddis.nasa.gov/archive/GPS_Explorer/archive/
https://cddis.nasa.gov/archive/GPS_Explorer/archive/ (You will be prompted
to register for a NASA EARTHDATA account.)



Please check out our Web pages at (
http://sopac-csrc.ucsd.edu/index.php/measures-2/
http://sopac-csrc.ucsd.edu/index.php/measures-2/)

for more information. We have brief videos for MGViz and each of our
products.



The products include:

(1) Combined daily displacement time series for about 3500 regional and
global IGS stations, installed and maintained with geodetic quality and
well-documented metadata. We have two main products (with different flavors
trended, detrended, PCA-filtered, residuals).

. The first is the result of extensive quality control and includes
unmodeled time series where non-physical displacements and poor-quality data
have been identified and corrected.

. The second is a parametrically-fit time series, including slopes,
offsets, postseismic motions, seasonal terms, with uncertainties for all
parameters based on white and colored noise components. Solutions for the
longest-lived stations begin in 1992.

(2) A list of "problematic" stations that should be used with caution.

(3) Weekly station velocities (for stations with more than 2.5 years of
data) and coseismic displacements.

(4) Weekly 3-D displacement grids interpolated from the median-filtered
daily time series.

(5) Weekly horizontal strain rate grids.

(6) Modeled ETS transient events for Cascadia since 1994.

(7) Water storage data for the Western U.S. since 2006.

(8) 5-minute troposphere delay estimates from 1992 and precipitable water
from 1995.

(9) 100 Hz seismogeodetic and 1Hz GPS displacement and velocity waveforms
for historical earthquakes.



A detailed document providing a description of our products with underlying
algorithms and theory can be found at
http://garner.ucsd.edu/pub/measuresESESES_products/ATBD/
http://garner.ucsd.edu/pub/measuresESESES_products/ATBD/.



Please provide us with feedback, problem reports, or feature requests.



Yehuda Bock, PI (ybock @ ucsd.edu)

and

Angelyn Moore, JPL lead (Angelyn.W.Moore @ jpl.nasa.gov)





________________________________________________

Distinguished Researcher and Senior Lecturer

Director, Scripps Orbit and Permanent Array Center (SOPAC)

Director, California Spatial Reference Center (CSRC)

Address:

University of California San Diego

9500 Gilman Drive

La Jolla, California 92093-0225

Office: 858-534-5292

Cell: 858-245-9518




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