Satellite laser ranging and gravity field modeling accuracy
Abstract
Gravitational field mismodeling procedures errors in the estimated orbital motion of near Earth satellites. This effect is studied using a linear perturbation approach following the analysis of Kaula. The perturbations in the orbital position as defined by either orbital elements or Cartesian components are determined. From these perturbations it is possible to ascertain the expected signal due to gravitational mismodeling that would be present in stationtosatellite laser ranging measurements. This expected signal has been estimated for the case of the Lageos satellite and using the predicted uncertainties of the GEMT1 and GEMT2 gravity field models. The results indicate that observable signal still exists in the laser range residuals given the current accuracy of the range measurements and the accuracy of the gravity field models.
 Publication:

Colorado Univ. Boulder Technical Report
 Pub Date:
 1990
 Bibcode:
 1990cub..rept.....R
 Keywords:

 Earth Gravitation;
 Error Analysis;
 Gravitational Fields;
 Laser Range Finders;
 Orbit Calculation;
 Orbital Elements;
 Orbital Mechanics;
 Orbital Position Estimation;
 Rangefinding;
 Satellite Instruments;
 Satellite Perturbation;
 Cartesian Coordinates;
 Covariance;
 Dynamic Models;
 Equations Of Motion;
 Geodetic Satellites;
 Lageos (Satellite);
 Lagrangian Equilibrium Points;
 Linear Equations;
 Satellite Altimetry;
 Astrodynamics