Two Measuring Methods for Antenna Rotating Center Based on Elevation Axes Intersection and Spherical Fitting

LI Zongchun; LU Zhiyong; GUO Yinggang; ZHANG Guanyu; HE Hua; FENG Qiqiang; CHEN Shaoqing; WANG Junwei

doi:10.13203/j.whugis20180064

Volume 44 Issue 10

Oct. 2019

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Geomatics and Information Science of Wuhan University > 2019 > 44(10): 1449-1456. > DOI: 10.13203/j.whugis20180064

LI Zongchun, LU Zhiyong, GUO Yinggang, ZHANG Guanyu, HE Hua, FENG Qiqiang, CHEN Shaoqing, WANG Junwei. Two Measuring Methods for Antenna Rotating Center Based on Elevation Axes Intersection and Spherical Fitting[J]. Geomatics and Information Science of Wuhan University, 2019, 44(10): 1449-1456. DOI: 10.13203/j.whugis20180064

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Two Measuring Methods for Antenna Rotating Center Based on Elevation Axes Intersection and Spherical Fitting

1.
Institute of Geospatial Information, Information Engineering University, Zhengzhou 450001, China
2.
CETC Key Laboratory of Aerospace Information Applications, Shijiazhuang 050081, China

Funds: The Open Foundation of CETC Key Laboratory of Aerospace Information Applications

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LI Zongchun, professor, PhD specializes in precise engineering survey. E-mail:13838092876@139.com
Received Date: August 11, 2018
Published Date: October 04, 2019

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Abstract

In traditional method, the model of elevation axis fitting is not rigor, which influences the accuracy and reliability of rotation center. To overcome this drawback, two new methods are proposed to get rotation center respectively based on elevation axes intersecting and spherical fitting. The trajectory of target points in different azimuths are fitted to acquire elevation axes which contain azimuth information, and the intersection of elevation axes is taken as rotation center, which is called as the elevation axes intersection method. This method is more reliable than the traditional method. The target points are fitted as a sphere to obtain a series of spherical centers, and their average is taken as the rotation center, which is named as the spherical fitting method. This method avoids the process of circle fitting and axes intersecting, which is more reasonable than the others. An uplink antenna array consists of three φ3 m antennas is taken as experimental object. Total station and industrial photogrammetric system are combined to get the coordinates of points on antenna. By employing the two new proposed methods, the antenna rotation centers are precisely acquired in a sub-millimeter level.
- uplink array,
- local ties survey,
- antenna rotation center,
- industrial photogrammetry,
- elevation axes intersection,
- spherical fitting

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