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- W1851805126 abstract "Abstract Terra MODerate Resolution Imaging Spectroradiometer (MODIS) is one of the key sensors in the NASA's Earth Observing System, which has successfully completed 15 years of on‐orbit operation. Terra MODIS continues to collect valuable information of the Earth's energy radiation from visible to thermal infrared wavelengths. The instrument has been well characterized over its lifetime using onboard calibrators whose calibration references are traceable to the National Institute of Standards and Technology standards. In this paper, we focus on the electronic crosstalk effect of Terra MODIS band 29, a thermal emissive band (TEB) whose center wavelength is 8.55 µm. Previous works have established the mechanism to describe the effect of the electronic crosstalk in the TEB channels of Terra MODIS. This work utilizes the established methodology to apply to band 29. The electronic crosstalk is identified and characterized using the regularly scheduled lunar observations. The moon being a near‐pulse‐like source allowed easy detection of extraneous signals around the actual Moon surface. First, the crosstalk‐transmitting bands are identified along with their amplitudes. The crosstalk effect then is characterized using a moving average mechanism that allows a high fidelity of the magnitude to be corrected. The lunar‐based analysis unambiguously shows that the crosstalk contamination is becoming more severe in recent years and should be corrected in order to maintain calibration quality for the affected spectral bands. Finally, two radiometrically well‐characterized sites, Pacific Ocean and Libya 1 desert, are used to assess the impact of crosstalk effect. It is shown that the crosstalk contamination induces a long‐term upward drift of 1.5 K in band 29 brightness temperature of MODIS Collection 6 L1B, which could significantly impact the science products. The crosstalk effect also induces strong detector‐to‐detector differences, which result in severe stripping in the Earth view images. With crosstalk correction applied, both the long‐term drift and detector differences are significantly reduced." @default.
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- W1851805126 date "2015-10-05" @default.
- W1851805126 modified "2023-10-06" @default.
- W1851805126 title "Long‐term drift induced by the electronic crosstalk in Terra MODIS Band 29" @default.
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- W1851805126 doi "https://doi.org/10.1002/2015jd023602" @default.
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