Fulltext

Efficient satellite orbit modelling using pseudo-stochastic parameters

Beutler, G. ; Jäggi, A. ; Hugentobler, U. ; Mervart, L.

In: Journal of Geodesy, 2006, vol. 80, no. 7, p. 353-372

Ajouter à la liste personnelle
    Titre
    • Efficient satellite orbit modelling using pseudo-stochastic parameters
    Auteur
    • Beutler, G.. Astronomical Institute, University of Bern, Sidlerstrasse 5, 3012, Bern, Switzerland
    • Jäggi, A.. Astronomical Institute, University of Bern, Sidlerstrasse 5, 3012, Bern, Switzerland
    • Hugentobler, U.. Astronomical Institute, University of Bern, Sidlerstrasse 5, 3012, Bern, Switzerland
    • Mervart, L.. Institute of Advanced Geodesy, Czech Technical University, K-152, FSvCVVT, Thakurova 7, 16629, Prague 6-Dejvice, Czech Republic
    Type de document
    • Postprint
    Identifiant OAI-PMH
    • oai:doc.rero.ch:321361
    Summary
    If the force field acting on an artificial Earth satellite is not known a priori with sufficient accuracy to represent its observations on their accuracy level, one may introduce so-called pseudo-stochastic parameters into an orbit determination process, e.g. instantaneous velocity changes at user-defined epochs or piecewise constant accelerations in user-defined adjacent time subintervals or piecewise linear and continuous accelerations in adjacent time subintervals. The procedures, based on standard least-squares, associated with such parameterizations are well established, but they become inefficient (slow) if the number of pseudo-stochastic parameters becomes large. We develop two efficient methods to solve the orbit determination problem in the presence of pseudo-stochastic parameters. The results of the methods are identical to those obtained with conventional least-squares algorithms. The first efficient algorithm also provides the full variance-covariance matrix; the second, even more efficient algorithm, only parts of it