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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Desert-Based Absolute Calibration of Successive Geostationary Visible Sensors Using a Daily Exoatmospheric Radiance Model
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Desert-Based Absolute Calibration of Successive Geostationary Visible Sensors Using a Daily Exoatmospheric Radiance Model

机译：使用每日大气大气辐射模型对连续地球同步可视传感器进行基于沙漠的绝对校准

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摘要

A desert daily exoatmospheric radiance model (DERM) based on a well-calibrated (reference) geostationary Earth orbit (GEO) satellite visible sensor can be used to transfer the calibration to a (target) GEO sensor located at the same equatorial longitude location. The DERM is based on the reference GEO daily radiances observed over a single pseudoinvariant calibration site (PICS) being that the daily angular conditions are repeated annually for any historical or successive colocated GEO. The GEO-specific PICSs used in the study are first inspected using the well-calibrated Aqua-MODerate Resolution Imaging Spectroradiometer (MODIS) exoatmospheric reflectances for stability. The Libyan Desert site was found to be stable within 1$%$ over ten years. The average clear-sky daily local-noon interannual variability based on Meteosat-9 0.65- $muhbox{m}$ top-of-atmosphere radiances over the Libyan Desert is 0.74$%$, which implies that the combined surface and atmospheric column is invariant. A spectral band adjustment factor, based on Scanning Imaging Absorption Spectrometer for Atmospheric Cartography spectral radiances, is used to account for sensor spectral response function (SRF) differences between the reference and target GEO. The GEO reference calibration was based on the GEO/Aqua-MODIS ray-matched radiance intercalibration transfer technique. The reference Meteosat-9 DERM and ray-matched calibration consistency was within 0.4$%$ and 1.9 $%$ for Meteosat-8 and Meteosat-7, respectively. Similarly, GOES-10 and GOES-15 were calibrated based on the GOES-11 DERM using the Sonoran Desert and were found to have a consistency within 1$%$ and 3 $%$, respectively.
机译：基于良好校准的（参考）地球静止地球轨道（GEO）卫星可见传感器的沙漠每日大气外辐射率模型（DERM）可用于将校准传递至位于同一赤道经度位置的（目标）GEO传感器。 DERM基于在单个伪不变校准站点（PICS）上观测到的参考GEO每日辐射，因为每天对任何历史或连续并置的GEO重复每天的角度条件。首先使用经过良好校准的Aqua-MODerate分辨率成像光谱仪（MODIS）大气外反射率检查研究中使用的GEO专用PICS的稳定性。发现利比亚沙漠遗址在十年内稳定在1 %% $之内。根据Meteosat-9 0.65- $ muhbox {m} $利比亚沙漠上空的最高大气辐射率得出的晴空每日局部-年际年平均变化为0.74 $％$，这意味着地面和大气总和为不变的基于用于大气制图光谱辐射度的扫描成像吸收光谱仪的光谱带调整因子，用于说明参考GEOO和目标GEO之间的传感器光谱响应函数（SRF）差异。 GEO参考校准基于GEO / Aqua-MODIS射线匹配辐射互校准传递技术。 Meteosat-9和Meteosat-7的参考Meteosat-9 DERM和射线匹配的校准一致性分别在0.4％和1.9％之间。同样，使用Sonoran沙漠基于GOES-11 DERM对GOES-10和GOES-15进行了校准，发现其一致性分别在1％和3％之间。

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