An overview of in-orbit radiometric calibration of typical satellite sensors
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Abstract. This paper reviews the development of in-orbit radiometric calibration methods in the past 40 years. It summarizes the development of in-orbit radiometric calibration technology of typical satellite sensors in the visible/near-infrared bands and the thermal infrared band. Focuses on the visible/near-infrared bands radiometric calibration method including: Lamp calibration and solar radiationbased calibration. Summarizes the calibration technology of Landsat series satellite sensors including MSS, TM, ETM+, OLI, TIRS; SPOT series satellite sensors including HRV, HRS. In addition to the above sensors, there are also summarizing ALI which was equipped on EO-1, IRMSS which was equipped on CBERS series satellite. Comparing the in-orbit radiometric calibration technology of different periods but the same type satellite sensors analyzes the similarities and differences of calibration technology. Meanwhile summarizes the in-orbit radiometric calibration technology in the same periods but different country satellite sensors advantages and disadvantages of calibration technology.Keywords:
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Relative radiometric calibration is a very important way in improving the quality of picture getting from remote sensing satellite,and calibration by radiometric calibration sites is just an effective method in relative radiometric calibration.By introducing the principle and the process of CCD camera remote sensing satellite image forming,the paper analyzed the principle of relative radiometric calibration,and then described three methods of carrying out relative radiometric calibration.Meanwhile,aiming at On-Board Calibration,the paper also discussed the method of selecting radiometric calibration site,and introduced several radiometric calibration sites which were thought as excellent.
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The present development of microwave radiometry for medical applications encourages the development of methods for computer modelling of the radiometric thermal signals transmitted by living tissues. This method, considers both homogeneous and multilayered tissues. We present here computed data for the definition of microwave radiometric imaging and for the interpretation of radiometric data.
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A few years ago, we compared for the first time the World Radiometric Reference, which is used as reference for meteorological radiometry, and the Système International (SI) radiometric scale realized at the National Physical Laboratory with cryogenic radiometers. We present an improved comparison which used as transfer standard a trap detector calibrated to the NPL primary standard cryogenic radiometer. As a realization of the World Radiometric Reference, we used an electrical substitution radiometer traceable to the WRR and used in solar radiometry. The method of transfer has been improved and the results confirm those of the first comparison but with much lower uncertainty.
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TES is an infrared Fourier transform spectrometer on board the EOS-Aura spacecraft launched July 15, 2004. Improvements to the radiometric calibration and consequent assessment of radiometric accuracy have been on-going since launch.
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The radiometric data, obtained in medical applications, have to be quantitatively interpreted. A necessary first step, with this aim in mind, is the definition of an accurate method of computation of the radiometric signals for three dimensionnal thermal structures. We define such a tool and demonstrate its feasibility in classical and correlation radiometry.
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A radiometric calibration method is described in this paper by using the deep convective clouds (Deep Convective Cloud, DCC) target for FY-2 visible channel. The deep convective cloud can be used as the radiometric calibration transfer object. The on-operational FY-2 radiometric calibration bias and the long-term degradation trend are evaluated according to the AQUA/MODIS instrument as the baseline of radiometric reference and DCC. The results show that: (1) There are different degrees of degradation for FY-2D, FY-2E and FY-2F, among which FY-2D has the biggest degradation due to the longest period. The annual rates of degradation for FY-2D and FY-2E are quite similar, 1.67% and 1.69% respectively, whereas the rate for FY-2F is lower with 0.81%; (2) During the period of satellite eclipse, the instruments are not stable and this phenomenon could be detected by the DCC method;(3) There are bias in the the operational radiometric calibration between FY-2 and AQUA/MODIS, which is treated as the the radiometric reference usually. The radiometric calibration method based on DCC could work well in the radiometric calibration for FY-2. The results will help us to understand the degradation of instrument and for quantitative application usage.
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