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http://dx.doi.org/10.7780/kjrs.2020.36.6.1.4

Verification of GEO-KOMPSAT-2A AMI Radiometric Calibration Parameters Using an Evaluation Tool  

Jin, Kyoungwook (Image Data System Development Division, Korea Aerospace Research Institute)
Park, Jin-Hyung (Image Data System Development Division, Korea Aerospace Research Institute)
Publication Information
Korean Journal of Remote Sensing / v.36, no.6_1, 2020 , pp. 1323-1337 More about this Journal
Abstract
GEO-KOMPSAT-2A AMI (Advanced Meteorological Imager) radiometric calibration evaluation is an essential element not only for functional and performance verification of the payload but for the quality of the sensor data. AMI instrument consists of six reflective channels and ten thermal infrared ones. One of the key parameters representing radiometric properties of the sensor is a SNR (Signal-to-Noise Ratio) for the reflective channels and a NEdT (Noise Equivalent delta Temperature) for the IR ones respectively. Other important radiometric calibration parameters are a dynamic range and a gain value related with the responsivity of detectors. To verify major radiometric calibration performance of AMI, an offline radiometric evaluation tool was developed separately with a real-time AMI data processing system. Using the evaluation tool, validation activities were carried out during the GEO-KOMPSAT-2A In-Orbit Test period. The results from the evaluation tool were cross checked with those of the HARRIS, which is the AMI payload vendor. AMI radiometric evaluation activities were conducted through three phases for both sides (Side 1 and Side 2) of AMI payload. Results showed that performances of the key radiometric properties were outstanding with respect to the radiometric requirements of the payload. The effectiveness of the evaluation tool was verified as well.
Keywords
AMI; Data Quality; GEO-KOMPSAT-2A; Radiometric Calibration;
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Times Cited By KSCI : 2  (Citation Analysis)
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