Message-Id: <3E8412D6.CFB13D04@bv.tum.de> Date: Fri, 28 Mar 2003 10:16:06 +0100 From: Markus Rothacher Organization: Forschungseinrichtung =?iso-8859-1?Q?Satellitengeod=E4sie?=, TU =?iso-8859-1?Q?M=FCnchen?= To: IGSMAIL Subject: [IGSMAIL-4324]: Test Set of Absolute Antenna PCVs Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 28 Mar 01:09:58 PST 2003 Message Number 4324 ****************************************************************************** Author: Markus Rothacher Dear Colleagues, it took much longer than initially thought to put together a new consistent set of GPS antenna phase center offsets and phase center variations (PCVs), but here it is. The following remarks concerning this new set should be considered: - The set of PCVs contains now absolute antenna patterns and no longer patterns relative to the AOAD/M_T antenna. - Values for satellite and receiver antennas are given in the new ANTEX format. - Not only elevation- but also azimuth-dependent PCVs are available for some (not all) of the receiver antenna types. PCVs with elevation-dependence only are also given (see keyword NOAZI in ANTEX). - GPS satellite antenna PCVs are included and have to be used together with the absolute receiver antenna PCVs to avoid a wrong scaling of the GPS results by about 15 ppb. - Offsets and PCVs have to be used consistently, for the receiver as well as for the satellite antennas. - The set of PCV corrections given here is a test set that should only be used to perform tests at present. After thorough testing it will be decided, whether the new set will become the new official IGS set. - We would like to thank the company Geo++ and the Institut für Erdmessung for making their absolute robot calibration measurements available to us. - The satellite antenna PCVs were computed from global GPS data, which means that only the ionosphere-free PCVs are presently available. The L1 and L2 PCVs were set to the ionosphere-free PCVs. The ANTEX format description (antex10.txt) and the test set of PCVs (pcv_abs_proposed.tst) may be downloaded from the IGS CB information system at ftp://igscb.jpl.nasa.gov/pub/station/general/pcv_proposed Much success with your tests ! If there are any questions, comments, results etc., please let us know. With best regards, Markus Rothacher (rothacher@bv.tum.de) Ralf Schmid (schmid@bv.tum.de) -------------------------------------------------------------------------------- Prof. Dr. Markus Rothacher Phone : ++49-89-289-23191 Forschungseinrichtung Satellitengeodaesie Fax : ++49-89-289-23178 Technische Universitaet Muenchen E-mail: markus.rothacher@bv.tum.de Arcisstrasse 21 D-80290 Muenchen / Germany