Delivered-To: igsmail@igscb.jpl.nasa.gov Date: Sun, 5 Mar 2006 14:05:59 +0100 (CET) From: Gerd Gendt To: IGSmail Subject: [IGSMAIL-5318]: IGS absolute antenna model igs05_1364.atx, update including GLONASS Message-ID: Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 06 Mar 10:57:36 PST 2006 Message Number 5318 ****************************************************************************** Author: Gerd Gendt Subject: IGS absolute antenna model igs05_1364.atx, update including GLONASS Dear colleagues, As already announced (IGSMAIL-5189) the IGS is preparing a switch from relative to absolute antenna calibrations. For several months the new model was already used in parallel tests, which will enable the IGS to set up a consistent new reference frame. Recently, CODE has computed antenna PCVs and offsets for all GPS and GLONASS satellites based on a reprocessing for the intervals January and August 2004, March 2005 and June to December 2005. The solution for the GPS satellites is in good agreement with the existing models, in PCV and offsets. Therefore we are confident that the simultaneously estimated GLONASS parameters are consistent with the existing model for GPS. The mean pattern for GLONASS (including GLONASS-M) [mm] is: 2.7 0.3 -0.1 -0.5 -0.8 -0.8 -0.5 -0.2 -0.3 -0.2 -0.2 0.1 -0.1 -0.1 0.7 This pattern was fixed in a second step, together with the GPS antenna patterns and offsets, to generate the antenna offsets for all active GLONASS satellites (referenced to epoch 2000.0): GLONASS Slot Offset [mm] 701 6 2187.6 +- 16.7 nobs: 193 711 5 1912.1 +- 21.6 nobs: 242 712 7 2330.3 +- 19.1 nobs: 162 783 18 1906.6 +- 11.0 nobs: 322 787 17 2044.6 +- 15.1 nobs: 275 788 24 2073.8 +- 15.3 nobs: 251 789 3 1971.0 +- 16.6 nobs: 256 791 22 1978.1 +- 11.5 nobs: 317 792 21 1954.7 +- 13.4 nobs: 284 793 23 1987.0 +- 10.5 nobs: 321 794 2 1939.2 +- 13.9 nobs: 228 795 4 2001.0 +- 15.0 nobs: 228 796 1 1924.2 +- 13.1 nobs: 219 797 8 1817.8 +- 20.3 nobs: 197 798 19 2044.4 +- 25.8 nobs: 25 The inclusion of the GLONASS antenna models completes now the new model. Additionally, the following calibrations were added to the latest version: TRM29659.00 SCIS (RABT, SLOR) TRM29659.00 SCIT (not in use within the IGS) TRM41249.00 SCIT (not in use within the IGS) After the official release of the ITRF2005 within a few weeks the IGS will define the new IGS05 reference frame and will officially switch to the absolute antenna model. The latest version of the model can be found at: ftp://igscb.jpl.nasa.gov/igscb/station/general/pcv_proposed/igs05_1364.atx Best regards Gerd Gendt ****************************************************************************** * Gerd Gendt * * _/_/_/ _/_/_/_/_/_/ GeoForschungsZentrum * * _/ _/ _/ Department Geodesy and Remote Sensing * * _/ _/_/ _/_/ _/ Telegrafenberg A17 * * _/ _/ _/ _/ D-14473 Potsdam , GERMANY * * _/_/_/ _/ _/_/_/ Phone : ++49 331 288 1114 Fax :++49 331 288 1759 * * E-Mail: gendt@gfz-potsdam.de * * IGS GFZ AC : AFTP://ftp.gfz-potsdam.de/pub/igsprod * * http://www.gfz-potsdam.de/igs * * IGS Analysis Coord.: AFTP://ftp.gfz-potsdam.de/pub/igsacc * * http://www.gfz-potsdam.de/igsacc * ******************************************************************************