****************************************************************************** dorismail 20-Jan-2009 16:05:43 Message No 0574 ****************************************************************************** Author: "H. Fagard" Subject: Antenna raising at Cibinong (Indonesia) Dear Colleagues, The antenna of the DORIS station at Cibinong has been raised in order to remove the N-type bent adapters at the base of the antenna. This was done by adding a half-meter tower section on top of the existing support: a 3 metre concrete pillar built in 2000 using the initial 3 metre tower as a reinforcing structure. It was time we replaced the antenna supporting plate - an anodised aluminium one - since it started to show minor signs of corrosion. The process had started but with no consequence at this stage on the antenna verticality. The antenna, antenna cables, beacon and battery were replaced with new units. The transmissions from the former antenna location (CICB) stopped on January 5, 2009, and resumed on January 7 after the antenna raising. The acronym for the new reference point is CIDB. The DOMES number for the new antenna reference point is 23101S003. The geodetic connection to the permanent GPS station "BAKO", already measured in 2000, was measured again through GPS observations and spirit levelling. The resulting ITRF2005, 2000.0 coordinates for CIDB are: X= -1836963.799 m Y= 6065627.178 m Z= -716217.324 m SigX = 0.002 m SigY = 0.003 m SigZ = 0.002 m I remind you the DPOD2005=ITRF2005 velocities for this site : VX = -0.0225 m/y VY = -0.0113 m/y VZ = -0.0043 m/y SigVX = 0.0006 m/y SigVY = 0.0006 m/y SigVZ = 0.0004 m/y 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