Improving DORIS geocenter time series using an empirical rescaling of solar radiation pressure models

Abstract Even if Satellite Laser Ranging (SLR) remains the fundamental technique for geocenter monitoring, DORIS can also determine this geophysical parameter. Gobinddass et al. (2009) found that part of the systematic errors at 118 days and 1 year can be significantly reduced by rescaling the current solar radiation pressure models using satellite-dependent empirical models. Here we extend this study to all DORIS satellites and propose a complete set of empirical solar radiation parameter coefficients. A specific problem related to SPOT-5 solar panel realignment is also detected and explained. New DORIS geocenter solutions now show a much better agreement in amplitude with independent SLR solutions and with recent geophysical models. Finally, the impact of this refined DORIS data strategy is discussed in terms of Z-geocenter monitoring as well as for other geodetic products (altitude of high latitude station such as Thule in Greenland) and Precise Orbit Determination. After reprocessing the full 1993.0-2008.0 DORIS data set, we confirm that the proposed strategy allows a significant reduction of systematic errors at periods of 118 days and 1 year (up to 20 mm), especially for the most recent data after 2002.5, when more DORIS satellites are available for geodetic purposes.

[1]  F. LeMoine,et al.  A reassessment of global and regional mean sea level trends from TOPEX and Jason‐1 altimetry based on revised reference frame and orbits , 2007 .

[2]  Gerhard Beutler,et al.  Contribution of SLR tracking data to GNSS orbit determination , 2007 .

[3]  J. Ray,et al.  Effect of the satellite laser ranging network distribution on geocenter motion estimation , 2009 .

[4]  C. Noll,et al.  The International DORIS Service: genesis and early achievements , 2006 .

[5]  Jean-Michel Lemoine,et al.  A corrective model for Jason-1 DORIS Doppler data in relation to the South Atlantic Anomaly , 2006 .

[6]  M. Watkins,et al.  Long term changes in the Earth's shape, rotation, and geocenter , 1993 .

[7]  Pascal Willis,et al.  Isostatic stability of the East Antarctic station Dumont d’Urville from long-term geodetic observations and geophysical models , 2009 .

[8]  Michael B. Heflin,et al.  Precise determination of earth's center of mass using measurements from the Global Positioning System , 1992 .

[9]  A. Cazenave,et al.  Sea Level Rise During Past 40 Years Determined from Satellite and in Situ Observations , 2001, Science.

[10]  P. Willis,et al.  Analysis of DORIS range-rate residuals for TOPEX/Poseidon, Jason, Envisat and SPOT , 2007 .

[11]  Crowley,et al.  Atmospheric science: Methane rises from wetlands , 2011, Nature.

[12]  Pascal Willis,et al.  Parameter sensitivity of TOPIX orbit and derived mean sea level to DORIS stations coordinates , 2002 .

[13]  Pascal Willis,et al.  External validation of the GRACE GGM01C gravity field using GPS and DORIS positioning results , 2004 .

[14]  Peter J. Clarke,et al.  Geocenter motions from GPS: A unified observation model , 2006 .

[15]  Pascal Willis,et al.  Terrestrial reference frame effects on global sea level rise determination from TOPEX/Poseidon altimetric data , 2004 .

[16]  Pascal Willis,et al.  DPOD2005: An extension of ITRF2005 for Precise Orbit Determination , 2009 .

[17]  Pascal Willis,et al.  Error Analysis of Weekly Station Coordinates in the DORIS Network , 2006 .

[18]  B Meisel Refined approaches for terrestrial reference frame computations , 2004 .

[19]  Pascal Willis,et al.  DORIS: From orbit determination for altimeter missions to geodesy , 2006 .

[20]  Y. Bar-Sever,et al.  Systematic biases in DORIS-derived geocenter time series related to solar radiation pressure mis-modeling , 2009 .

[21]  M. Ziebart,et al.  Combined radiation pressure and thermal modelling of complex satellites: Algorithms and on-orbit tests , 2004 .

[22]  P. Willis,et al.  Systematic errors in the Z-geocenter derived using satellite tracking data: a case study from SPOT-4 DORIS data in 1998 , 2006 .

[23]  Shfaqat Abbas Khan,et al.  Geodetic measurements of postglacial adjustments in Greenland , 2008 .

[24]  S. Luthcke,et al.  Erratum-Modeling Radiation Forces Acting on Topex/Poseidon for Precision Orbit Determination , 1992 .

[25]  Michael B. Heflin,et al.  Global coordinates with centimeter accuracy in the International Terrestrial Reference Frame using GPS , 1992 .

[26]  J. P. Berthias,et al.  Comportement de l'oscillateur DORIS/Jason au passage de l'anomalie sud-atlantique , 2004 .

[27]  Z. Altamimi,et al.  ITRF2005 : A new release of the International Terrestrial Reference Frame based on time series of station positions and Earth Orientation Parameters , 2007 .

[28]  M. K. Cheng,et al.  Geocenter variations caused by atmosphere, ocean and surface ground water , 1997 .

[29]  Jean-François Crétaux,et al.  Seasonal and interannual geocenter motion from SLR and DORIS measurements: Comparison with surface loading data , 2002 .

[30]  P. Willis,et al.  Applications géodésiques du système DORIS à l'Institut géographique national , 2005 .

[31]  M. Ziebart Generalized Analytical Solar Radiation Pressure Modeling Algorithm for Spacecraft of Complex Shape , 2004 .

[32]  P. Willis,et al.  DORIS as a potential part of a global geodetic observing system , 2005 .

[33]  R. Nerem,et al.  Geophysical interpretation of observed geocenter variations , 1999 .

[34]  Pascal Willis,et al.  Terrestrial reference frame requirements within GGOS perspective , 2005 .

[35]  D. Kuang,et al.  DORIS Satellite Phase Center Determination and Consequences on the Derived Scale of the Terrestrial Reference Frame , 2007 .

[36]  T. P. Yunck,et al.  Origin of the International Terrestrial Reference Frame , 2003 .

[37]  Philip Moore,et al.  Geocentre variation from laser tracking of LAGEOS and loading data , 2003 .

[38]  Yoaz Bar-Sever,et al.  Effects of thermosphere total density perturbations on LEO orbits during severe geomagnetic conditions (Oct–Nov 2003) using DORIS and SLR data , 2005 .

[39]  Donald F. Argus,et al.  Defining the translational velocity of the reference frame of Earth , 2007 .

[40]  Claus Fröhlich,et al.  The Sun's total irradiance: Cycles, trends and related climate change uncertainties since 1976 , 1998 .

[41]  A. Moccia,et al.  Spaceborne bistatic Synthetic Aperture Radar for remote sensing applications , 2000 .