DOI: 10.1002/2015JD023602
论文题名: Long-term drift induced by the electronic crosstalk in Terra MODIS Band 29
作者: Sun J. ; Madhavan S. ; Xiong X. ; Wang M.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2015
卷: 120, 期: 19 起始页码: 9944
结束页码: 9954
语种: 英语
英文关键词: crosstalk
; MODIS
; radiometric improvements
; striping
; Terra
; thermal emissive bands
Scopus关键词: brightness temperature
; calibration
; drift behavior
; energy budget
; long-term change
; lunar crust
; MODIS
; radiometer
; signal processing
; Terra (satellite)
; thermal convection
; wavelength
; Libyan Arab Jamahiriya
; Pacific Ocean
英文摘要: 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. ©2015. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62999
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: NOAA National Environmental Satellite Data, and Information Service, Center for Satellite Applications and Research, College Park, MD, United States; Global Science and Technology, Greenbelt, MD, United States; Science Systems and Applications Inc., Lanham, MD, United States; Sciences and Exploration Directorate, NASA/GSFC, Greenbelt, MD, United States
Recommended Citation:
Sun J.,Madhavan S.,Xiong X.,et al. Long-term drift induced by the electronic crosstalk in Terra MODIS Band 29[J]. Journal of Geophysical Research: Atmospheres,2015-01-01,120(19)