Full Text

Turn on search term navigation

© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

For the same antenna type, numerical differences among the phase center correction (PCC) models released by different institutes can reach several millimeters, which is far beyond the nominal calibration accuracy. This contribution introduces a new method to evaluate the consistency of these PCC models. We first investigated the coupling of phase center offset (PCO) and phase center variation (PCV) through simulation experiments, and the results show that the calibrated PCO values under different strategies may result in large differences, and so do PCV values due to strong coupling with PCO. This is further confirmed by field calibration experiments. Moreover, a new datum parameter is introduced to equivalently transform the PCC models to assess the consistency of PCC models of the same antenna type calibrated under different strategies or by different facilities. It is also essential to perform consistency analysis of PCC models in the coordinate domain. We further investigated these PCC models through a simulated positioning experiment. The results show that millimeter-level consistency of PCC models will lead to the same level of positioning precision in the coordinate domain. Moreover, as a comparison, both baseline positioning and PPP were performed with an antenna-type JAV_RINGANT_G3T NONE based on real observations. Multiday results showed that the average RMS of the positioning differences between PCC models from robot and anechoic chamber calibration is less than 1 mm for the baseline solution and 4 mm for the PPP solution, although the PCC model differences can reach 6 mm in L1 and 4 mm in L2, respectively. Finally, we also investigated the distribution of position biases without PCC or with inaccurate PCC. Considering the actual GPS constellation, we found that position biases have a strong correlation with latitude, if PCV values fluctuate greatly with the users’ elevation angle.

Details

Title
Consistency Analysis of the GNSS Antenna Phase Center Correction Models
Author
Zhou, Renyu 1 ; Hu, Zhigang 1   VIAFID ORCID Logo  ; Zhao, Qile 1 ; Cai, Hongliang 2 ; Liu, Xuanzuo 1 ; Liu, Chengyi 1 ; Wang, Guangxing 3 ; Kan, Haoyu 1 ; Chen, Liang 4   VIAFID ORCID Logo 

 GNSS Research Center, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, China; [email protected] (R.Z.); [email protected] (Z.H.); [email protected] (X.L.); [email protected] (C.L.); [email protected] (H.K.) 
 Beijing Institute of Tracking&Telecommunication Technology, Beijing 100094, China; [email protected] 
 School of Geography and Information Engineering, China University of Geosciences, Wuhan 430078, China; [email protected] 
 School of Electronic and Information Engineering, Beihang University, 37 Xueyuan Road, Beijing 100191, China; [email protected] 
First page
540
Publication year
2022
Publication date
2022
Publisher
MDPI AG
e-ISSN
20724292
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2627831016
Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.