Geodetic and Atmospheric Measurements GPS Data Analysis for Earth Orientation at the Jet Propulsion Laboratory

Details Geodetic and Atmospheric Measurements GPS Data Analysis for Earth Orientation at the Jet Propulsion Laboratory Geodetic and Atmospheric Measurements GPS Data Analysis for Earth Orientation at the Jet Propulsion Laboratory

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994itn....16c..45z&link_type=abstract

Results from the SEARCH'92 Campaign. (IERS Technical Note ; 16), Edited by J.O. Dickey and M. Feissel. Paris: Central Bureau of

Computer Science

Scientific paper

Beginning in June 1992 and continuing indefinitely as part of our contribution to FLINN (Fiducial Laboratories for an International Natural Science Network), DOSE (NASA's Dynamics of the Solid Earth Program), and the IGS (International GPS Geodynamics Service), analysts at the Jet Propulsion Laboratory (JPL) have routinely been reducing data from a globally-distributed network of Rogue Global Positioning System (GPS) receivers. Three products are produced and distributed weekly: (i) precise GPS satellite ephemerides, (ii) estimates of daily polar motion and length-of-day, and (iii) a descriptive narrative of the analysis for the week. These are typically made available to the public approximately two wecks following the data recording. In addition, more sophisticated data reduction techniques have been developed for non-routine, research-oriented GPS data analysis. These have been successfully utilized to measure subdaily Earth orientation fluctuations. Based on comparisons of our earth orientation parameters with independent techniques, we estimate daily pole position accuracies (la) of ±0.6 milliarcseconds and length-ofday accuracies of ±0.13 msec. Ongoing work at JPL is aimed at continuing the trend of producing more and higher-quality results at lower cost.

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