HR: 0830h
AN: G31B-0702    [PDF]
TI: Using Internet-Based Automated Software to Process GPS Data at Michigan Tech University
AU: * Crook, A
EM: acrook@mtu.edu
AF: Michigan Tech University, Dept. of Geological and Mining Engrg. and Sciences, Houghton, MI 49931 United States
AU: Diehl, J F
EM: jdiehl@mtu.edu
AF: Michigan Tech University, Dept. of Geological and Mining Engrg. and Sciences, Houghton, MI 49931 United States
AB: The Michigan Tech University GPS monument was made operational in October of 2002. The monument, which consists of a concrete pillar extending approximately 10 feet below the surface and protrudes 5 feet above ground, is located at the Houghton County Memorial Airport (47.171803$\deg$N, 88.498361$\deg$W). The primary purpose of the monument is to measure the velocity of the North American Plate at this location. A Trimble 4000ssi geodetic receiver with a Trimble Zephyr antenna is used to collect GPS data. The data are sent to a PC where they are processed using Auto-GIPSY, an internet-based GPS processing utility, which makes it possible to process GPS data, via email, without having knowledge of how the software works. Two Perl scripts were written to facilitate automation and to simplify processing of the GPS data even further. Twelve months of GPS data were processed, using Auto-GIPSY, which produced a velocity of -24 $\pm$ 5 mm/yr and -4 $\pm$ 6 mm/yr for the X and Y components respectively with an azimuth of 261$\deg$ with respect to the ITRF2000. This calculated result compares well with the NNR-NUVEL1A velocity of -17 mm/yr and -1 mm/yr for the X and Y components respectively with an azimuth of 267$\deg$. The results from an alternative online processing service, the Scripps Coordinate Update Tool (SCOUT) that uses GAMIT, will also be presented as a comparative method.
DE: 1200 GEODESY AND GRAVITY
DE: 1299 General or miscellaneous
SC: Geodesy [G]
MN: 2003 Fall Meeting