Antenna Calibration – Institute of Geodesy – Leibniz University Hannover

Calibration of GNSS receiver antennas with a robotic arm (Hannover principle)

Calibration of a Rover antenna using the Hannover-technique

The methodic technical progress of calibration procedures concentrates increasingly not only on geodetic precision antenna and precision receivers, but also on mass-market products, which are integrated into a large number of navigation sensors. A significantly increased efficiency of individual GNSS-instruments can be achieved through consistent calibration.

The group concentrates on the expansion and development of robotic techniques for the calibration of GNSS-receiving antennas for new GNSS-signals and frequencies and the estimation of antenna characteristics on geodetic parameter (position, time, troposphere).

Topics of the Working Group

Determination of Antenna Phase Center Corrections (PCC) and Improvement of the GNSS PCC Modelling
Determination and Analysis of the Antenna's Near Field Effect on GNSS Processing
Determination of Code Phase Variations (CPV, also known as Group Delay Variations - GDV)

History of Antenna Calibration in Hannover

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Analysis of GNSS-Antenna Characteristics

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The Institute of Geodesy cooperates with the International GNSS Service (IGS) as a recognized institution for the calibration of GNSS-receiver antennas. Close collaboration with internationally recognized calibration institutions is maintained as well (Geo++, SenStadtUm Berlin and Bezirksregierung Köln / Universität Bonn)

The institute also works with international and national working groups specializing in the realisation of international standards and regulations for precise GNSS-based navigation and positioning.

Links to Published GNSS-Antenna Calibration Files

International GNSS Service (IGS)

IGS server (current file)
Typmittel, Antenna Exchange Format (ATX)
Geo++ GmbH

PCV data base
individuell, Typmittel, Antenna Exchange Format (ATX) und Geo++ (ANT)
National Geodetic Service (NGS)

NGS data base
Typmittel, Antenna Exchange Format (ATX)
European Permanent Network (EPN)

EPN FTP server (current file)
individuell, Typmittel, Antenna Exchange Format (ATX)