IDS activity report 2011 - International DORIS Service

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12 REPORT OF THE GEOSCIENCE AUSTRALIA ANALYSISCENTER (GAU)Ramesh GOVIND (1)(1) Geoscience Australia, Canberra, Australia.The main DORIS analysis activity during 2011 was to contribute weekly multi-satelliteSINEX solution to the IDS Combination Centre; solutions for all of 2011 were submitted.The solutions up to the end of 7-day arc beginning 15 th May 2011 (gau11135wd09) comprisedDORIS data from SPOT-4, SPOT-5, Envisat and Jason-2. Further, these solutions were basedon apriori coordinates and Earth Orientation Parameters (EOP) ITRF2005 and IERS C04-05,respectively. Since the arc beginning 22 nd May 2011 (gau11142wd10), Cryosat-2 DORISdata has been included and the apriori coordinates and EOP were based on ITRF2008(supplemented by DPOD2008 with discontinuities) and IERS C04-08, respectively. Thiscontribution was reported in AGU poster (Moreaux et al, 2011).The DORIS determined orbits for Envisat, Jason-2 and Cryosat-2 are continually assessedwith respect to the observed SLR data for the respective satellites.The IDS analysis activity at Geoscience Australia is undertaken in collaboration with theGSFC Analysis centre – making orbit comparisons. In addition, results of non-conservativeforce modelling (General Acceleration – one-per-rev along and cross-track amplitude) for allsatellites during 2010 were submitted to GSFC and compared for consistency.47
13 REPORT OF THE GEODETICAL OBSERVATORY PECNYANALYSIS CENTER (GOP)Petr Stepanek (1)(1) Geodesy Observatory Pecný, Research Institute of Geodesy, Czech Republic13.1 ROUTINE DATA PROCESSINGAll the DORIS data from October 2010 to September 2011 were processed and analyzed. Thetwo kinds of solutions were generated, using identification wd32 and wd33. The differencebetween both solutions consists in the satellite constellation. The solution 32 includes the datafrom the satellites SPOT-4, SPOT-5, Envisat and Jason-2, while solution 33 includes theCryosat-2 data in addition. As the major improvement of the processing standards, the FES2004 OT model was implemented to substitute the older model CSR 3.0.The inclusion of Cryosat-2 didn`t bring a major effect on the accuracy of the solution or amarkedly higher stability of the transformation parameters with respect to the ITRF. Theimpact of addition of the new satellite into the solution is probably not so high as in the caseof Jason-2. There was only a minor effect on Tx, Ty parameters. The Tz translation parameterderived from a Cryosat-2 single-satellite solution express a strong annual signal. On the otherhand there is a significant impact of Cryosat-2 on the Earth rotation pole coordinatesestimation. The solution 33 expresses a lower RMS with respect to IERS C04 model. Incomparison to solution 32, RMS of Xp decreased from 0.50 mas to 0.38 mas and RMS of Ypdecreased from 0.42 mas to 0.38 mas.The weekly multi-satellite solutions were delivered to the IDS data center(s) in SINEX formatand the corresponding files are available for free download.13.2 DEVELOPMENT OF THE DYNAMICAL ORBITAL MODELCurrent routine GOP DORIS data processing is based on the empirical and pseudo-stochasticorbital modeling. This approach is supplying exact non-conservative force models, missing inthe Bernese GPS Software. The important goal to improve the orbit modeling is theimplementation of the Satellite attitude and macro-models and non-conservative perturbationforce models. The development started in late 2010, as the joint project of GOP and theInstitute for Astronomical and Physical Geodesy at the Technische Universtät München.Currently, the necessary non-conservative perturbation force models are implemented, as wellas the satellite attitude models for all the present and past DORIS satellites according to theCNES standards. The implemented force models include the solar radiation pressure,atmosphere drag (MSIS-86 density model) and the Earth radiation pressure (direct andindirect).48
Page 1 and 2: IDS2011TopexSpot 4Jason 1EnvisatHY-
Page 3 and 4: The IDS 2011 Report describes the h
Page 5 and 6: 13 REPORT OF THE GEODETICAL OBSERVA
Page 7 and 8: 10. Site logsDORIS stations descrip
Page 9 and 10: GLOSSARYACAGUAnalysis CenterAmerica
Page 11 and 12: GBGoverning BoardGDR-B, GDR-C, GDR-
Page 13 and 14: LCA, lcaacronyms for the CNES/CLS A
Page 15 and 16: SWOTSurface Water Ocean Topography.
Page 17 and 18: 2 HISTORYThe DORIS system was desig
Page 19 and 20: 3 ORGANIZATIONThe IDS organization
Page 21 and 22: 4 THE CENTRAL BUREAU: IDS INFORMATI
Page 23 and 24: • new version of the DORIS intern
Page 25 and 26: Many beacon failures occurred this
Page 27 and 28: 6 THE SATELLITES WITH DORIS RECEIVE
Page 29 and 30: Figure 3 gives a summary of the sat
Page 31 and 32: 7 IDS DATA FLOW COORDINATIONCarey N
Page 33 and 34: doris/products/geoc//doris/products
Page 35 and 36: DORIS phase data from Jason-2, Cryo
Page 37 and 38: 8 IDS DATA CENTERSCarey Noll (1), B
Page 39 and 40: 9 IDS ANALYSIS COORDINATIONFrank G.
Page 41 and 42: In support of the analysis activiti
Page 43 and 44: In the frame of the oral presentati
Page 45 and 46: 10.6 FUTURE PLANSThe activity of th
Page 47: 11.3 FUTURE ACTIVITIESThe Navigatio
Page 51 and 52: 14 REPORT OF THE GSFC/NASA ANALYSIS
Page 54 and 55: 4. red-std1110 (experimental): The
Page 56 and 57: Orbit Series Narcs SLR RMS of fit (
Page 58 and 59: 15 REPORT OF THE IGN/JPL ANALYSIS C
Page 60 and 61: 15.4 NEW DEVELOPMENTSIn 2010, new d
Page 62 and 63: 16.2 SOFTWARE UPDATE AND ANALYSIS R
Page 64 and 65: Product Series Data spanSINEX weekl
Page 66 and 67: 17.5 JASON-2 “TWO- CHANNEL LIKE
Page 68 and 69: Knocke, P., J. Ries, and B. Tapley
Page 70 and 71: 19 PUBLICATIONS (2011)Here is below
Page 72 and 73: 2 WEB AND FTP SITES2.1 IDS WEBSITEa
Page 74 and 75: 2.2 IDS FTP SERVERaddress: ftp://ft
Page 76 and 77: • Status of the Data Centers• M
Page 78 and 79: APPENDIX 2: DORIS STATIONS COLOCATI
Page 80 and 81: APPENDIX 3: DORIS STATIONS / HOST A
Page 82 and 83: Station nameInstituteCity, CountryR
Page 85: www.ids-doris.orgContactsGoverning

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