DOI: 10.1002/2015JD024278
论文题名: Characterization of geolocation accuracy of Suomi NPP Advanced Technology Microwave Sounder measurements
作者: Han Y. ; Weng F. ; Zou X. ; Yang H. ; Scott D.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 9 起始页码: 4933
结束页码: 4950
语种: 英语
英文关键词: ATMS geolocation error assessment
; coastline crossing method (CCM)
; land-sea fraction method (LFM)
Scopus关键词: accuracy assessment
; air temperature
; algorithm
; AMSU
; atmospheric moisture
; brightness temperature
; calibration
; coast
; error analysis
; nadir
; numerical method
; positioning
; Suomi NPP
英文摘要: The Advanced Technology Microwave Sounder (ATMS) onboard Suomi National Polar-orbiting Partnership satellite has 22 channels at frequencies ranging from 23 to 183 GHz for probing the atmospheric temperature and moisture under all weather conditions. As part of the ATMS calibration and validation activities, the geolocation accuracy of ATMS data must be well characterized and documented. In this study, the coastline crossing method (CCM) and the land-sea fraction method (LFM) are utilized to characterize and quantify the ATMS geolocation accuracy. The CCM is based on the inflection points of the ATMS window channel measurements across the coastlines, whereas the LFM collocates the ATMS window channel data with high-resolution land-sea mask data sets. Since the ATMS measurements provide five pairs of latitude and longitude data for K, Ka, V, W, and G bands, respectively, the window channels 1, 2, 3, 16, and 17 from each of these five bands are chosen for assessing the overall geolocation accuracy. ATMS geolocation errors estimated from both methods are generally consistent from 40 cases in June 2014. The ATMS along-Track (cross-Track) errors at nadir are within ±4.2 km (±1.2 km) for K/Ka, ±2.6 km (±2.7 km) for V bands, and ±1.2 km (±0.6 km) at W and G bands, respectively. At the W band, the geolocation errors derived from both algorithms are probably less reliable due to a reduced contrast of brightness temperatures in coastal areas. These estimated ATMS along-Track and cross-Track geolocation errors are well within the uncertainty requirements for all bands. © 2016. American Geophysical Union. All Rights Reserved. 资助项目: 91337218
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62863
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: Center of Data Assimilation for Research and Application, Nanjing University of Information Science and Technology, Nanjing, China; NOAA Center for Satellite Applications and Research, Silver Spring, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Space Dynamic Laboratory, Utah State University, Salt Lake City, UT, United States
Recommended Citation:
Han Y.,Weng F.,Zou X.,et al. Characterization of geolocation accuracy of Suomi NPP Advanced Technology Microwave Sounder measurements[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(9)