[IGSMAIL-3340]: resend: BLK II A antenna calibration

[Gerald L Mader]

******************************************************************************
IGS Electronic Mail      21 May 09:36:16 PDT 2001      Message Number 3340
******************************************************************************

Author: Gerry Mader  NGS/NOS/NOAA

My thanks to Bruce Schupler for pointing out that I interchanged the
final L1 and L2 z-offsets that I quoted for the BLK II A antenna in the
previous email. I have corrected these numbers below and on the final
slide found at the web site.

     Author:  Gerry Mader  NGS/NOS/NOAA
Subject:  Calibration of the BLK II A satellite antenna

A presentation and the results of our calibration of a BLK II A GPS
Satellite at the Boeing Co. during December, 2000, are now available at
the NGS antenna calibration web site. Please note that the new address
of this site is www.ngs.noaa.gov/ANTCAL .

We have determined the z-offsets from the center of mass to be:

L1  =  118 cm
L2  =   87 cm
LC  =  166 cm

We have also included a file containing the absolute antenna
calibrations for all the antennas we have currently calibrated. This
file was created by combining our current relative calibrations with the

absolute values for the AOAD/M_T antenna reported by Falko Menge et al.
and found at:

http://www.ife.uni-hannover.de/~web/AOA_DM_T/

We are currently scheduled to repeat these measurements at Boeing during

the week of June 11 and will also include a BLK II F antenna. We are
also starting discussions to calibrate a BLK II R antenna at
Lockheed-Martin.

We have done some preliminary global solutions using these new antenna
values and hope that the other Analysis Centers and others will do so
also. Please contact me for any comments or questions.