Content-Type: text/plain; charset="iso-8859-1" ; format="flowed" X-MIME-Autoconverted: from 8bit to quoted-printable by dutilleux.ensg.ign.fr id h4SCqF930035 ****************************************************************************** DORISMail 28-May-2003 13:59:05 Message No 0243 ****************************************************************************** Author: "H. Fagard" Subject: New IDS station at Wettzell (Germany) Dear Colleagues, Following a proposal by BKG (Budesamt für Kartographie und Geodäsie) to host additional DORIS stations at Wettzell (Germany) and TIGO (Concepción, Chile) withing the frame of the DORIS Pilot Experiment (soon IDS), a new DORIS station has been installed within the premises of the "Fundamentalstation" at Wettzell. It consists of a third generation beacon and a Starec antenna, supported by a two-meter high, 30 cm sided very rigid tower, installed on a SLR concrete pad. The name of the station is "Wettzell" and its acronym in the data files is WETB. Transmissions started on May 20, 2003. The DOMES number for the antenna reference point is 14201S042. Its coordinates (ITRF2000, 1997.0), derived from those of the CDP 7597 marker above which the antenna is centered, are: X= 4075603.445 m Y= 931826.895 m Z= 4801549.633 m (sigma: 5 mm) And the ITRF2000 velocities for this site are: VX= -0.0157 m/y VY= 0.0172 m/y VZ= 0.0087 m/y Please note that: - like other stations installed following IDS proposals, it is not considered part of the "DORIS permanent orbitography network". - in order to avoid jamming with nearby stations in Europe, the transmitted frequencies have been shifted with respect to the nominal DORIS frequencies. - because interference on the VLBI measurements due to the DORIS transmissions have been noticed (there is only 140 m between both antennas), the DORIS beacon will have to be switched off at least three days a week, plus one hour daily on the other days. It will therefore be a "part-time" DORIS station. - this new station has been programmed on the receivers on board Jason and Envisat, the only models able to handle shifted frequency beacons. Best regards, Herve Fagard -- ====================================================================== Herve FAGARD e-mail : herve.fagard@ign.fr Institut Geographique National 94165 SAINT-MANDE CEDEX PHONE : + 33 1 43 98 81 48 FRANCE FAX : + 33 1 43 98 84 50 ====================================================================== Please do not reply directly to this message, but send comments and suggestions to IDS.central.bureau@cls.fr