Modeling UT1-UTC and polar motion on-board GPS satellites
Abstract
Autonomous navigation of GPS satellites requires on-board knowledge of UT1-UTC and polar motion values. The ability of a fourth-order and fifth-order Fourier series to predict UT1-UTC values over six months based on one or three-year BIH tables is examined. Results show that UT1-UTC errors of approximately 40 ms occur over six months when three-year data bases are used. Polar motion contributes another .02 arcsec or 1.3 ms.
- Publication:
-
Navigation
- Pub Date:
- 1984
- Bibcode:
- 1984Navig..31..209F
- Keywords:
-
- Computerized Simulation;
- Earth Axis;
- Geodetic Accuracy;
- Global Positioning System;
- Position Errors;
- Satellite Observation;
- Angular Velocity;
- Autonomous Navigation;
- Earth Rotation;
- Fourier Series;
- Polar Wandering (Geology);
- Root-Mean-Square Errors;
- Velocity Errors;
- Space Communications, Spacecraft Communications, Command and Tracking