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http://dx.doi.org/10.7319/kogsis.2014.22.3.113

Analysis of the Optimal Degree and Order of Spherical Harmonics for the GNSS Receiver Antenna's PCV Correction  

Kim, Jin Yi (Dept. of Geoinformatic Engineering, Inha University)
Won, Ji Hye (Research Institute, Jipyong Space Inc.)
Park, Kwan Dong (Dept. of Geoinformatic Engineering, Inha University)
Seo, Seung Woo (The 3rd R&D Institute, Agency for Defence Development)
Park, Heung Won (The 3rd R&D Institute, Agency for Defence Development)
Publication Information
Journal of Korean Society for Geospatial Information Science / v.22, no.3, 2014 , pp. 113-119 More about this Journal
Abstract
The positioning accuracy of GNSS surveys deteriorates due to various error factor, and many users sometimes ignore Phase Center Variation (PCV) of antennas. IGS provides an ANTEX file which contains PCV correction information to correct for PCVs. But it is not directly applicable because PCV correction information is provided at 5-degree intervals in the azimuth and elevation directions for the case of receiver antennas, and at 1-degree intervals in the nadir angle for the case of satellite antennas. So, we devised new and optimal ways of interpolating PCV in any desired line of sight to the GNSS satellite. We used spherical harmonics fitting methods in terms of the azimuth and elevation angle for interpolation, and found an optimal degree and order. It is shown that the best accuracy was obtained from the 8 by 8 spherical harmonics. If one requires lower burden on computing resources, the order and degree less than 8 could produce resonable accuracy except for 1st and 5th order.
Keywords
GPS; GLONASS; PCV; Spherical Harmonics;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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