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A demonstration of centimeter-level monitoring of polar motion with the global positioning system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Freedman, A. P. Lindqwister, U. J. Blewitt, G. |
| Copyright Year | 1992 |
| Description | Daily estimates of the Earth's pole position were obtained with the Global Positioning System (GPS) by using measurements obtained during the GPS IERS (International Earth Rotation Service) and Geodynamics (GIG'91) experiment from 22 Jan. to 13 Feb. 1991. Data from a globally distributed network consisting of 21 Rogue GPS receivers were chosen for the analysis. A comparison of the GPS polar motion series with nine 24-hour very long baseline interferometry (VLBI) estimates yielded agreement in the day-to-day pole position of about 1.5 cm for both X and Y polar motion. A similar comparison of GPS and satellite laser ranging (SLR) data showed agreement to about 1.0 cm. These preliminary results indicate that polar motion can be determined by GPS independent of, and at a level comparable to, that which is obtained from either VLBI or SLR. Furthermore, GPS can provide these data with a daily frequency that neither alternative technique can readily achieve. Thus, GPS promises to be a powerful tool for determining high-frequency platform parameter variation, essential for the ultraprecise spacecraft-tracking requirements of the coming years. |
| File Size | 514577 |
| Page Count | 9 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920015059 |
| Archival Resource Key | ark:/13960/t46q6vw7n |
| Language | English |
| Publisher Date | 1992-02-15 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Communications And Navigation Polar Wandering Geology Positioning Earth Rotation Navigation Satellites Very Long Base Interferometry Satellite Instruments Global Positioning System Geodynamics Estimates Laser Range Finders Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
