[IGSMAIL-7639] Antenna Chamber Calibrations request

[Arturo Villiger]

Dear colleagues,

At present, type mean calibrated receiver antenna phase center 
corrections obtained from robot calibrations (considering only GPS and 
GLONASS L1/L2 patterns) are used within the IGS. With the new GNSS 
systems; Galileo, Beidou, QZSS, and the modernisation of the GPS 
constellation, the L1/L2 corrections no longer cover the needs for 
multi-GNSS data processing. In particular the lack of E5 patterns for 
Galileo and L5 for GPS is a major limitation for POD. The release of the 
Galileo IOV and FOC (as well as the QZSS) satellite antenna corrections 
would allow processing them using calibrated phase center offsets and 
phase variations for the space and the ground based antennas.

We intend to create type mean calibrations to compare GNSS analysis 
results of chamber calibrations with those relying on robot 
calibrations. Therefore, we are looking for any calibrations, regardless 
whether an antenna is part of the IGS network or not. We have already 
received various contributions to this study and are thankful for any 
additional antenna corrections from chamber calibrations. The results of 
such comparisons will be presented at the IGS Workshop 2018 in Wuhan and 
will be discussed in the corresponding Antenna Working Group splinter 
meeting.

If you prefer that your contribution is not made publicly available, 
please indicate so and we will only use your calibrations only 
internally for these studies.

At the IGS Workshop 2017 in Paris a dedicated study on this problem was 
presented:

  Consistency antenna products in the MGEX environment : 
http://www.igs.org/v/5569

We appreciate any contribution to this call for chamber calibration 
values. If you would like to contribute or if you have further questions 
to this collecting effort, please do not hesitate to contact me: 
Arturo.villiger at aiub.unibe.ch


Best regards,

Arturo Villiger - Chair of the IGS AWG

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Arturo Villiger
Astronomical Institute
University of Bern
Sidlerstrasse 5
CH - 3012 Bern / Switzerland

phone ++41 31 631 85 06
fax   ++41 31 631 38 69
arturo.villiger at aiub.unibe.ch
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