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首页> 外文期刊>Remote Sensing >Monitoring the NOAA Operational VIIRS RSB and DNB Calibration Stability Using Monthly and Semi-Monthly Deep Convective Clouds Time Series
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Monitoring the NOAA Operational VIIRS RSB and DNB Calibration Stability Using Monthly and Semi-Monthly Deep Convective Clouds Time Series

机译：使用月度和半月度深对流云时间序列监控NOAA运行VIIRS RSB和DNB校准稳定性

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The Visible and Infrared Imaging Radiometer Suite (VIIRS) onboard the Joint Polar Satellite System (JPSS)/Suomi National Polar-Orbiting Partnership (SNPP) satellite provide sensor data records for the retrievals of many environment data records. It is critical to monitor the VIIRS long-term calibration stability to ensure quality EDR retrieval. This study investigates the radiometric calibration stability of the NOAA operational SNPP VIIRS Reflective Solar Bands (RSB) and Day-Night-Band (DNB) using Deep Convective Clouds (DCC). Monthly and semi-monthly DCC time series for 10 moderate resolution bands (M-bands, M1–M5 and M7–M11, March 2013–September 2015), DNB (March 2013–September 2015, low gain stage), and three imagery resolution bands (I-bands, I1–I3, January 2014–September 2015) were developed and analyzed for long-term radiometric calibration stability monitoring. Monthly DCC time series show that M5 and M7 are generally stable, with a stability of 0.4%. DNB has also been stable since May 2013, after its relative response function update, with a stability of 0.5%. The stabilities of M1–M4 are 0.6%–0.8%. Large fluctuations in M1–M4 DCC reflectance were observed since early 2014, correlated with F-factor (calibration coefficients) trend changes during the same period. The stabilities of M8-M11 are from 1.0% to 3.1%, comparable to the natural DCC variability at the shortwave infrared spectrum. DCC mean band ratio time series show that the calibration stabilities of I1–I3 follow closely with M5, M7, and M10. Relative calibration changes were observed in M1/M4 and M5/M7 DCC mean band ratio time series. The DCC time series are generally consistent with results from the VIIRS validation sites and VIIRS/MODIS (the Moderate-resolution Imaging Spectroradiometer) simultaneous nadir overpass time series. Semi-monthly DCC time series for RSB M-bands and DNB were compared with monthly DCC time series. The results indicate that semi-monthly DCC time series are useful for stability monitoring at higher temporal resolution.
机译：联合极地卫星系统（JPSS）/ Suomi国家极地轨道合作伙伴关系（SNPP）卫星上的可见和红外成像辐射计套件（VIIRS）提供传感器数据记录，用于检索许多环境数据记录。监视VIIRS长期校准稳定性以确保高质量的EDR检索至关重要。这项研究使用深对流云（DCC）研究了NOAA运行的SNPP VIIRS反射太阳波段（RSB）和昼夜波段（DNB）的辐射定标稳定性。 10个中等分辨率波段（M波段，M1-M5和M7-M11，2013年3月至2015年9月），DNB（2013年3月至2015年9月，低增益阶段）的每月和每半个月DCC时间序列，以及三个图像分辨率波段（I波段，I1-I3，2014年1月至2015年9月）已开发并进行了分析，以进行长期辐射定标稳定性监测。每月DCC时间序列显示M5和M7通常稳定，稳定度为0.4％。自2013年5月起，DNB在更新其相对响应功能后也一直保持稳定，稳定度为0.5％。 M1-M4的稳定性为0.6％-0.8％。自2014年初以来，M1-M4 DCC反射率出现了较大的波动，与同期的F因子（校准系数）趋势变化相关。 M8-M11的稳定性为1.0％至3.1％，与短波红外光谱中的自然DCC变异性相当。 DCC平均带比时间序列显示，I1-I3的校准稳定性与M5，M7和M10密切相关。在M1 / M4和M5 / M7 DCC平均带比时间序列中观察到相对校准变化。 DCC时间序列通常与VIIRS验证站点和VIIRS / MODIS（中等分辨率成像光谱辐射仪）同时最低点立交时间序列的结果一致。将RSB M频段和DNB的半月DCC时间序列与月DCC时间序列进行了比较。结果表明，每半个月DCC时间序列对于以较高的时间分辨率进行稳定性监视很有用。

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