干旱区生态环境知识资源中心(Arid): MODIS TEB calibration algorithm improvements for future L1B collection

Arid

DOI	10.1117/12.2567226
	MODIS TEB calibration algorithm improvements for future L1B collection
	Chang, Tiejun; Shrestha, Ashish; Diaz, Carlos Perez; Li, Yonghong; Chen, Na; Wu, Aisheng; Xiong, Xiaoxiong
通讯作者	Chang, TJ (corresponding author), Sci Syst & Applicat Inc, Lanham, MD 20706 USA.
会议名称	Conference on Earth Observing Systems XXV
会议日期	AUG 24-SEP 04, 2020
会议地点	ELECTR NETWORK
英文摘要	Terra and Aqua MODIS have provided continuous global observations for scientific applications for more than 20 and 18 years, respectively. The radiometric calibration of the MODIS thermal emissive bands (TEB) is based on a quadratic approximation of the instrument response. The calibration coefficients look-up tables (LUTs) are updated using the response of the MODIS on-board blackbody (BB) with the response background subtracted by space view. The quarterly on-board BB warm-up and cool-down activity temperature ranges from 270 K to 315 K, and the derived offset has a relatively large uncertainty. Electronic cross-talk, an artifact that affects both instrument calibration and Earth view (EV) radiance retrievals, is corrected based on lunar observations. Calibration assessments using EV observations (e.g. ocean, desert, Antarctic Dome Concordia, and deep convective clouds) provide useful information to evaluate the impact of the Terra safe mode (February 2016) and Aqua MODIS formatter reset (January 2018) events on both MODIS instruments. This study focuses on the TEB radiometric calibration algorithm improvements for future collections based on calibration assessments using EV measurements and analytical modeling. Measurement stability and consistency over specific Earth scenes with a wide temperature range, as well as their brightness temperature (BT) dependency, are used for bias estimations in the calibration coefficients. Calibration coefficients are derived and updated after adjusting the current fitting algorithm. Thereafter, using the test LUTs, their impact on the Level 1B (L1B) data for different EV scenes is analyzed.
英文关键词	MODIS radiometric calibration TEB DCC Dome-C
来源出版物	EARTH OBSERVING SYSTEMS XXV
ISSN	0277-786X
EISSN	1996-756X
出版年	2020
卷号	11501
ISBN	978-1-5106-3809-9
出版者	SPIE-INT SOC OPTICAL ENGINEERING
类型	Proceedings Paper
语种	英语
收录类别	CPCI-S
WOS记录号	WOS:000632463000031
WOS类目	Remote Sensing ; Physics, Applied
WOS研究方向	Remote Sensing ; Physics
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353120
作者单位	[Chang, Tiejun; Shrestha, Ashish; Diaz, Carlos Perez; Li, Yonghong; Chen, Na; Wu, Aisheng] Sci Syst & Applicat Inc, Lanham, MD 20706 USA; [Xiong, Xiaoxiong] NASA, Sci & Explorat Directorate, GSFC, Greenbelt, MD 20771 USA
推荐引用方式 GB/T 7714	Chang, Tiejun,Shrestha, Ashish,Diaz, Carlos Perez,et al. MODIS TEB calibration algorithm improvements for future L1B collection[C]:SPIE-INT SOC OPTICAL ENGINEERING,2020.