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S-NPP VIIRS thermal emissive band thermal calibration errors and their impact on blackbody warm up and cool down f factors

机译:S-NPP VIIRS热发射带热校准误差及其对黑体预热和冷却f因子的影响

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The Visible-Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi National Polar-orbiting Partnership (S-NPP) spacecraft as a primary sensor was launched October 28, 2011. There are 22 VIIRS bands: 7 thermal emissive bands (TEBs), 14 reflective solar bands (RSBs) and a Day Night Band (DNB). An on-orbit On-Board Calibrator BlackBody (OBCBB) is used as the TEB calibration source that tracks the detector gain change on a scan-by-scan basis. A thermal model to account for internal sensor emission is used in both the OBCBB derived gain calibration and Earth View (EV) radiance and brightness temperature retrievals. This thermal model uses pre-launch calibration coefficients to convert detector response into radiance and internal VIIRS cavity thermistors to estimate the sensor's internal emission from various optical surfaces. The inputs to the thermal model have uncertainties which introduce errors in both the gain correction and the EV retrievals. This paper will discuss the impacts of the thermal model uncertainties on the VIIRS calibration.
机译:Suomi国家极地轨道合作伙伴(S-NPP)航天器上的可见红外成像辐射计套件(VIIRS)作为主要传感器已于2011年10月28日发射升空。共有22个VIIRS波段:7个热发射波段(TEB),14个反射太阳波段(RSB)和日夜波段(DNB)。轨道上机载校准器BlackBody(OBCBB)用作TEB校准源,可逐扫描地跟踪检测器增益变化。在OBCBB导出的增益校准以及Earth View(EV)辐射和亮度温度检索中都使用了一个考虑内部传感器发射的热模型。该热模型使用发射前的校准系数将检测器的响应转换为辐射度,并使用内部VIIRS腔热敏电阻来估算传感器从各种光学表面发出的内部辐射。热模型的输入具有不确定性,这会在增益校正和EV取回中引入误差。本文将讨论热模型不确定性对VIIRS校准的影响。

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