IX INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN
CIVIL ENGINEERING
BOOK OF ABSTRACTS , 2024.год., стр. 111-111
ABSOLUTE GNSS RECEIVER ANTENNA CALIBRATION AT THE FACULTY OF GEODESY - UNIVERSITY OF ZAGREB| |
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| DOI: 10.14415/CACE2024.52 |
| UDK: 582.28 |
| CC-BY-SA 4.0 license |
| Аутор : Tupek, Antonio; Zrinjski, Mladen; Barković, Đuro; Špoljar, Krunoslav |
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| | Резиме: |
| | Global Navigation Satellite Systems (GNSSs) receivers are essential sensors for modern global positioning, navigation, and timing applications. Geodetic GNSS positioning applications are based on carrier-phase measurements, where the understanding of the GNSS signal's electrical reception characteristics, i.e., the receiver antenna phase center corrections (PCCs), is crucial. With the main objective of determining the PCC models of GNSS receiver antennas, only a few antenna calibration systems are in operation or under development worldwide. The International GNSS Service (IGS) publishes type-mean PCC models for almost all geodetic-grade GNSS antennas. However, the type-mean models are not perfect and do not fully reflect the signal reception properties of individual antennas. In this paper, the automated GNSS receiver antenna calibration system, recently developed at the University of Zagreb Faculty of Geodesy in Croatia, is shortly presented. The developed system is an absolute field calibration system based on the utilization of a Mitsubishi MELFA RV-4FML-Q 6-axis industrial robot. PCC modelling is based on triple-difference carrier-phase observations and spherical harmonics (SH) expansion. Global Positioning System (GPS) L1 and L2 frequencies calibration results for the LEIAX1202GG NONE antenna are presented. Furthermore, the individual and IGS type-mean PCC differences are quantified and the influence of both PCC models on geodetic positioning is analyzed. |
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| | Кључне речи: |
| | GNSS, ANTENNA CALIBRATION, INDUSTRIAL ROBOT, PHASE CENTER CORRECTION, GPS L1, GPS L2 |
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