From Jeff Thu Aug 31 18:42:19 1995 From: Jeff (Jeff) Date: Thu, 31 Aug 1995 18:42:19 PDT Subject: [IGSMAIL-1051] PGGA_update Message-ID: ****************************************************************************** IGS Electronic Mail Thu Aug 31 18:42:19 PDT 1995 Message Number 1051 ****************************************************************************** Author: Jeff Behr Subject: PGGA_update Scripps Orbit and Permanent Array Center (SOPAC) Date: August 31, 1995 Re: Antenna changes at PGGA sites SOPAC has upgraded seven PGGA sites with Dorne Margolin with choke ring antennae as tabulated below. Five sites have new antennae from Ashtech, fabricated based on the JPL design. Two sites have old Dorne Margolin R antennae supplied by Peter Worcester at SIO, which have been adapted for Ashtech Z-12 tracking (see also SCIGN mail 87). Unfortunately, the antenna at VNDP ceased functioning within 24 hours of its installation and had to be replaced with the original Ashtech Geodetic L1/L2 P antenna. We have received a replacement DM antenna from Ashtech which will be installed soon. Summary of Changes: Site Effective Date/time Antenna Ant. Ht. (m) Meas. Type ****************************************************************** SIO3 208/95 00:00 UTC DM R 1.9450 DHPAB MONP 214/95 00:00 UTC DM ASH 0.1186 DHPAB PIN1 214/95 00:00 UTC DM R 1.8450 DHPAB CRFP 215/95 00:00 UTC DM ASH 0.0335 DHPAB BLYT 215/95 00:00 UTC DM ASH 0.0347 DHPAB VNDP* 216/95 00:00 UTC DM ASH 1.7490 DHPAB TRAK 217/95 00:00 UTC DM ASH 0.5370 DHPAB also VNDP 228/95 00:00 UTC Ashtech 1.8480 DHPAB Geodetic L1/L2 P * Operational only for one day IGS site logs will be updated shortly. We apologize for the delayed notification of these changes. Jeff Behr [Mailed From: pgga at pgga.UCSD.EDU (Geodesy Lab account)]