CDDIS: NASA's Archive of Space Geodesy Data
Daily GNSS Geodetic Displacement Time Series

doi: 10.5067/GNSS/gnss_daily_displacement_timeseries_001

Data Center Citation

Noll, Carey E., The Crustal Dynamics Data Information System: A resource to support scientific analysis using space geodesy, Advances in Space Research, Volume 45, Issue 12, 15 June 2010, Pages 1421-1440, ISSN 0273-1177, http://dx.doi.org/10.1016/j.asr.2010.01.018.

Data Citation

ESESES MEaSUREs Daily GNSS Geodetic Displacement Time Series [online]. Available from the NASA Crustal Dynamics Data Information System DAAC, Greenbelt, MD, USA at: DOI: /10.5067/GNSS/gnss_daily_displacement_timeseries_001, Accessed [[enter user data access date]].

Other standard citation formats may be used for this data set and can be found at the DOI Citation Formatter website.

More information about CDDIS data citations and acknowledgments is available.

Summary

  • Name: Daily GNSS Geodetic Displacement Time Series available from the Crustal Dynamics Data Information System (CDDIS)
  • Format: SOPAC GLOBK ATS Model
  • Spatial Coverage: 90.0 to -90.0, 180.0 to -180.0
  • Temporal Coverage: 1992 to present
  • Temporal Resolution: Daily
  • File Size: 50 - 220 MB
  • Platforms: Multiple GNSS

Description

Making Earth System Data Records for Use in Research Environments (MEaSUREs) empowers the research community to participate in developing and generating data products that complement and augment NASA produced and distributed Earth science data products. NASA's Enhanced Solid Earth Science Earth Science Data Record (ESDR) System (ESESES) continues and extends mature geodetic data product generation and archival as part of the MEaSUREs SESES project providing new, multi-decade, calibrated and validated geodetic-derived ESDRs obtained by the Scripps Institution of Oceanography (SIO) and Jet Propulsion Laboratory/California Institute of Technology (JPL/Caltech). These data-derived products include continuous multi-year high-rate GNSS, seismogeodetic, and meteorological time series, a catalog of transient deformation in tectonically active areas known for aseismic motion such as ETS with focus in Cascadia, and continuous estimation and cataloging of total near-surface water content derived from continuous GNSS time series over the continental U.S.

Daily, combined, cleaned and filtered, GIPSY-GAMIT long-term time series of Continuous Global Navigation Satellite System (CGNSS) station positions (global and regional) in the latest version of ITRF.

Data Access

Daily GNSS Geodetic Displacement Time Series (including latest solution) are online:

Append the filenames below to the starting directory as described in the table below

SOLN_TYPE_DetrendNeuTimeSeries_SOURCE_YYYYMMDD.tar.gz

SOLN_TYPE_ResidNeuTimeSeries_SOURCE_YYYYMMDD.tar.gz

SOLN_TYPE_TrendNeuTimeSeries_SOURCE_YYYYMMDD.tar.gz

Code Meaning
SOLN Solution (WNAM=Western North America, GLB=Global)
TYPEClean, Filter, Raw, Raw_M, or Resid
SOURCESolution source (comb=combined, JPL, SOPAC)
YYYY 3-digit day of year
MM 2-digit month
DD 2-digit day of month
.tar Tar archive
.gz gzipped file

Definitions

  • Raw: Original Neu time series (trended)
  • Raw_M: Outliers removed, non-coseismic offsets repaired (trended)
  • Cleaned ("Clean"): Parametric time series model applied to data; outliers are removed from the trended and detrended time series
  • Trended ("Trend"): Non-coseismic offsets repaired
  • Detrended ("Detrend"):Estimated slope removed, non-coseismic offsets repaired
  • Filtered ("Filter"): Principal Component Analysis (PCA) filter is generated and then applied to the cleaned time series (trended or detrended)
  • Residuals ("Resid"): Difference between all estimated model values and the cleaned or filtered time series points – detrended by definition
  • Raw_TrendXYZ: Trended XYZ time series, coseismic and non-coseismic offsets not corrected, outliers removed
  • RawJumps_TrendXYZ: Trended XYZ time series, coseismic offsets not corrected, non-coseismic offsets corrected, outliers removed

More information about these solutions is available in this readme file:

https://cddis.nasa.gov/archive/GPS_Explorer/00Readme.txt

Documentation

http://cddis.nasa.gov/Data_and_Derived_Products/GNSS/MEaSUREs_products.html

See the ESESES Algorithm Theoretical Basis Document (ATBD) for detailed descriptions of the products: http://garner.ucsd.edu/pub/measuresESESES_products/ATBD/ESESES-ATBD.pdf