****************************************************************************** dorismail 26-Jul-2019 08:34:50 Message No 1191 ****************************************************************************** Author: Ferrage Pascale Subject: new Type of DORIS antenna Dear DORIS users, A new type of antenna is currently appearing in the DORIS network : Saint John's (Canada) is the first beacon fitted out with a TYPE D antenna (provider STAREC-COBHAM). It is active from July 2019, 3rd. Old TYPE B/C models will no more be installed : the next renewed stations will also be equipped with new TYPE D antennas, following Saint-John's example. These new antennas are similar in shape to the earlier TYPE B/C antennas, but they have : - slightly different values for their Center of Phase locations (a few centimeters), - slightly different phase laws. All their characteristics for the processing are already updated and available in the following IDS file (Antex format): ftp://ftp.ids-doris.org/pub/ids/stations/doris_phase_law_antex_starecD.txt We kindly advise you to take these values into account in your precise DORIS processings : it should improve their accuracy (currently, for Saint John's measurement). The document that describes in detail the characteristics of these antennas with the associated diagrams will soon be updated to include these STAREC D antennas at: ftp://ftp.ids-doris.org/pub/ids/stations/DORIS_System_Ground_Segment_Models.pdf Best regards, the DORIS project team