[IGSMAIL-3330]: BLK II A antenna calibration

[Gerald L Mader]

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IGS Electronic Mail      16 May 08:17:42 PDT 2001      Message Number 3330
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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  =   87 cm
L2  =  118 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.