FPGA-based data processing module design of on-board radiometric calibration in visible/near infrared bands

Guoqing Zhou; Chenyang Li; Tao Yue; Na Liu; Linjun Jiang; Yue Sun; Mingyan Li

doi:10.1117/12.2207225

9 December 2015 FPGA-based data processing module design of on-board radiometric calibration in visible/near infrared bands

Guoqing Zhou, Chenyang Li, Tao Yue, Na Liu, Linjun Jiang, Yue Sun, Mingyan Li

Author Affiliations +

Proceedings Volume 9808, International Conference on Intelligent Earth Observing and Applications 2015; 980839 (2015) https://doi.org/10.1117/12.2207225
Event: International Conference on Intelligent Earth Observing and Applications, 2015, Guilin, China

Abstract

FPGA technology has long been applied to on-board radiometric calibration data processing however the integration of FPGA program is not good enough. For example, some sensors compressed remote sensing images and transferred to ground station to calculate the calibration coefficients. It will affect the timeliness of on-board radiometric calibration. This paper designs an integrated flow chart of on-board radiometric calibration. Building FPGA-based radiometric calibration data processing modules uses system generator. Thesis focuses on analyzing the calculation accuracy of FPGA-based two-point method and verifies the feasibility of this method. Calibration data was acquired by hardware platform which was built using integrating sphere, CMOS camera (canon 60d), ASD spectrometers and light filter (center wavelength: 690nm, bandwidth: 45nm). The platform can simulate single-band on-board radiometric calibration data acquisition in visible/near infrared band. Making an experiment of calibration coefficients calculation uses obtained data and FPGA modules. Experimental results show that: the camera linearity is above 99% meeting the experimental requirement. Compares with MATLAB the calculation accuracy of two-point method by FPGA are as follows: the error of gain value is 0.0053%; the error of offset value is 0.00038719%. Those results meet experimental accuracy requirement.

Citation Download Citation

Guoqing Zhou, Chenyang Li, Tao Yue, Na Liu, Linjun Jiang, Yue Sun, and Mingyan Li "FPGA-based data processing module design of on-board radiometric calibration in visible/near infrared bands", Proc. SPIE 9808, International Conference on Intelligent Earth Observing and Applications 2015, 980839 (9 December 2015); https://doi.org/10.1117/12.2207225

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KEYWORDS

Calibration

Field programmable gate arrays

Data processing

Nonuniformity corrections

Satellites

Sensors

Cameras

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