Acta Geodaetica et Cartographica Sinica ›› 2017, Vol. 46 ›› Issue (8): 1009-1016.doi: 10.11947/j.AGCS.2017.20160392

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A Study on Relative Radiometric Calibration without Calibration Field for YG-25

ZHANG Guo, LI Litao   

  1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China
  • Received:2016-08-23 Revised:2017-06-27 Online:2017-08-20 Published:2017-09-01
  • Supported by:
    Key Research and Development Program of Ministry of Science and Technology(No.2016YFB0500801);National Natural Science Foundation of China (Nos. 91538106;41501503;41501383;41601490);Hubei Provincial Natural Science Foundation of China (No.2015CFB330);Open Research Fund of State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing(No.15E02);Open Research Fund of State Key Laboratory of Geo-information Engineering(No.SKLGIE2015-Z-3-1);Fundamental Research Funds for the Central University(No.2042016kf0163)

Abstract: YG-25 is the first agility optical remote sensing satellite of China to acquire the sub-meter imagery of the earth. The side slither calibration technique is an on-orbit maneuver that has been used to flat-field image data acquired over the uniform calibration field. However, imaging to the single uniform calibration field cannot afford to calibrate the full dynamic response range of the sensor and reduces the efficiency. The paper proposes a new relative radiometric calibration method that a 90-degree yaw maneuver is performed over any non-uniform features of the Earth for YG-25. Meanwhile, we use an enhanced side slither image horizontal correction method based on line segment detector(LSD)algorithm to solve the side slither image over-shifted problem.The shifted results are compared with other horizontal correction method. The histogram match algorithm is used to calculate the relative gains of all detectors. The correctness and validity of the proposed method are validated by using the YG-25 on-board side slither data. The results prove that the mean streaking metrics of relative correction images of YG-25 is better 0.07%, the noticeable striping artifact and residual noise are removed, the calibration accuracy of side slither technique based on non-uniform features is superior to life image statistics of sensor's life span.

Key words: without calibration field, yaw calibration, relative radiometric calibration, YG-25

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