IDS Workshop 
 
Venice 2006

IDS Workshop 2006Abstract

Statistical studies of DORIS stations stability in view of a combined solution

Dr Karine LE BAIL(1), Dr Jean-Jacques VALETTE(2), Ms Wassila ZERHOUNI(3), Dr Martine FEISSEL-VERNIER(4)

(1) LAREG/IGN - GEMINI/OCA, MARNE LA VALLEE, FRANCE
(2) CLS, TOULOUSE, FRANCE
(3) CNTS, ARZEW, ALGERIA
(4) SYRTE/Obs. PARIS - LAREG/IGN, PARIS, FRANCE

Session theme: Other topics:

Abstract

In this study, we compare solutions of DORIS station time series from three analysis centers. The IGN-JPL (ign) and INASAN (ina) solutions are obtained with the same software; the LEGOS-CLS (lca) is obtained with an independent software. In a first step, we investigate their annual components and the correlations of their residuals with respect to a linear trend. Then, to analyze the spectral content in the time series, we use a new method presented in the study "spectral characteristics of the DORIS position time series". Derived from this, we determine a stability index and a weight factor per station which takes into account its medium term stability. The weight factors range from 1 to 5, showing a large dynamic of the stations quality. These preliminary results bring us to propose the consideration of station-specific weights in each solution for deriving a DORIS combined solution.

 
Corresponding author:

    Dr Karine LE BAIL
    IGN - OCA, LAREG - GEMINI
    6 et 8, Avenue Blaise Pascal - Champs Sur Marne
    77455 MARNE LA VALLEE
    FRANCE
    Phone: 33 (0) 1 64 15 32 63
    Fax: 33 (0) 1 64 15 32 53
    E-mail:

 

All rights reserved, copyright ©  1999-2006 CNES, CLS