Acta Photonica Sinica, Volume. 50, Issue 2, 142(2021)

Geolocation and Correction Method for Dual Polarization Instrument on Same Platform

Zhenyang LI1,2,3, Peng ZOU1,3、*, Zhenhai LIU1,3, Shuangshuang ZHU1,2,3, Xuefeng LEI1,2,3, and Jin HONG1,2,3
Author Affiliations
  • 1Anhui Institute of Optics and Fine Mechanics, Hefei Institute of Physical Science,Chinese Academy of Science, Hefei23003, China
  • 2University of Science and Technology of China, Hefei3006, China
  • 3Key Laboratory of Optical Calibration and Characterization of Chinese Academy of Science, Hefei2001, China
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    On the same platform, two or more different polarization loads are used for joint observation, achieving complementary advantages by fusion inversion so as to obtain data products with higher precision and quality. To achieve the joint detection and cross calibration transmission of two polarization loads, the field of view matching between them is one of the key issues that need to be solved. For this purpose, an aviation verification system based on the Particulate Observing Scanning Polarimeter(POSP) and the Simultaneous Imaging Polarization Camera(SIPC) is built, then the flight experiment is completed. According to the sensing geometry and spatial response characteristics of two-polarization instrument, the corresponding models of observation pixel and geographical spatial position are established by coordinate transformation, meanwhile, the geolocation result is corrected by the digital elevation model and the instrument misalignment correction. The error sources that affect the accuracy of geolocation are analyzed. Based on this, an error statistical model based on Monte Carlo method is established for simulation calculation. This method is applied to airborne SIPC and POSP geolocation, and the consistency of the measurement results between the two instruments is analyzed. The results show that the polarization degree deviation of the two polarization instruments is less than 2% and the radiance deviation is less than 5% after the geospatial locations is matched, indicating the feasibility and validity of the geolocation and correction method. It provides an effective way for the subsequent geolocation of spaceborne polarized crossfire detection.

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    Zhenyang LI, Peng ZOU, Zhenhai LIU, Shuangshuang ZHU, Xuefeng LEI, Jin HONG. Geolocation and Correction Method for Dual Polarization Instrument on Same Platform[J]. Acta Photonica Sinica, 2021, 50(2): 142

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: --

    Accepted: --

    Published Online: Aug. 26, 2021

    The Author Email: ZOU Peng (pzou@aiofm.ac.cn)

    DOI:10.3788/gzxb20215002.0212003

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