Title :
Application of the Hill-Clohessy-Wiltshire equation in GNSS orbit prediction
Author :
Xiaolong Zhang ; Piche, Robert
Author_Institution :
Tampere Univ. of Technol., Tampere, Finland
Abstract :
We present an initial state correction algorithm for GNSS orbit prediction that uses the solution of the Hill-Clohessy-Wiltshire equation to build the Jacobian matrix. This algorithm improves the accuracy of GNSS orbit prediction through adding one or more observations. In the tests of 14 days orbit prediction, by adding one broadcast ephemeris as an observation collected before the initial BE with a long enough interval, we get orbit-only User Range Error within 70 meters, and orbit errors in the radial direction is less than 15 meters. In tangential direction, the error is within 400 meters.
Keywords :
Jacobian matrices; satellite navigation; GNSS orbit prediction; Hill-Clohessy-Wiltshire equation; Jacobian matrix; broadcast ephemeris; distance 400 m; distance 70 m; orbit errors; user range error; Accuracy; Earth; Gravity; Orbits;
Conference_Titel :
Localization and GNSS (ICL-GNSS), 2014 International Conference on
Conference_Location :
Helsinki
DOI :
10.1109/ICL-GNSS.2014.6934162