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- W1979949351 abstract "In order to best detect real changes in the Earth's climate system, it is estimated that in space based instrumentationmeasuring the Earth Radiation Budget (ERB) must remain calibrated with a stability of 0.3W m −2 per decade and reach an absolute accuracy of 1W m −2 . Such stability is beyond that specified by existing ERBprograms such as the Clouds and the Earth's Radiant Energy System (CERES, using three broadband radiometricscanning channels: the shortwave (SW 0.3−5um), Total (0.3− > 100um), and window (8−12um)).The CERES measurement of daytime outgoing longwave radiance (OLR) is obtained using subtraction of theSW channel signal from that of the co-aligned Total channel telescope. This requires precise balancing of theestimated response of the Total channel optics with those of the SW only channel when viewing daytime Earthscenes. Any post ground calibration contamination of Total channel optics that reduces its response to SW radiancecan therefore upset this balancing process, introducing biases and trends in measurements of daytime LWradiance. This paper presents a new methodology used for balancing Total and SW channel spectral responsesfor all daytime Earth scenes using a model of contaminant spectral darkening. The results of the technique whenapplied to both CERES units on Terra are shown to remove significant trends and biases in measurements ofdaytime LW radiance." @default.
- W1979949351 created "2016-06-24" @default.
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- W1979949351 date "2007-09-13" @default.
- W1979949351 modified "2023-09-23" @default.
- W1979949351 title "Spectral balancing of a broadband Earth observing radiometer with co-aligned Short Wave channel to ensure accuracy and stability of broadband daytime Outgoing Long-Wave Radiance measurements: Application to CERES" @default.
- W1979949351 doi "https://doi.org/10.1117/12.734492" @default.
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