DOI: 10.1002/2013JD020439
论文题名: An initial assessment of Suomi NPP VIIRS vegetation index EDR
作者: Vargas M. ; Miura T. ; Shabanov N. ; Kato A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 22 起始页码: 12301
结束页码: 12316
语种: 英语
英文关键词: EDR
; EVI
; NDVI
; SNPP
; Vegetation Index
Scopus关键词: Errors
; Radiometers
; Weather forecasting
; EDR
; EVI
; NDVI
; SNPP
; Vegetation index
; Pixels
; algorithm
; AVHRR
; cloud cover
; error analysis
; MODIS
; monitoring system
; NDVI
; pixel
; satellite imagery
; snow cover
; spatiotemporal analysis
; surface reflectance
; trend analysis
; vegetation index
英文摘要: The Suomi National Polar-orbiting Partnership (S-NPP) satellite with Visible/Infrared Imager/Radiometer Suite (VIIRS) onboard was launched in October 2011. VIIRS is the primary instrument for a suite of Environmental Data Records (EDR), including Vegetation Index (VI) EDR, for weather forecasting and climate research. The VIIRS VI EDR operational product consists of the Top of the Atmosphere (TOA) Normalized Difference Vegetation Index (NDVI), the Top of the Canopy (TOC) Enhanced Vegetation Index (EVI), and per-pixel product quality information. In this paper, we report results of our assessment of the early VIIRS VI EDR (beta quality) using Aqua MODIS and NOAA-18 AVHRR/3 as a reference for May 2012 to March 2013. We conducted two types of analyses focused on an assessment of physical (global scale) and radiometric (regional scale) performances of VIIRS VI EDR. Both TOA NDVI and TOC EVI of VIIRS showed spatial and temporal trends consistent with the MODIS counterparts, whereas VIIRS TOA NDVI was systematically higher than that of AVHRR. Performance of the early VIIRS VI EDR was limited by a lack of adequate per-pixel quality information, commission/omission errors of the cloud mask, and uncertainties associated with the surface reflectance retrievals. A number of enhancements to the VI EDR are planned, including: (1) implementation of a TOC EVI back-up algorithm, (2) addition of more detailed quality flags on aerosols, clouds, and snow cover, and (3) implementation of gridding and temporal compositing. A web-based, product quality monitoring tool has been developed and automated product validation protocols are being prototyped. Key Points Present initial results of assessment of the VIIRS VI EDR product after launch VI showed good product integrity and was found radiometrically performing well VI is beta quality and users are warned that the product still contains errors ©2013. 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/63132
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 for Satellite Applications and Research, National Oceanic and Atmospheric Administration, 5830 University Research Court, College Park, MD 20740, United States; Department of Natural Resources and Environmental Management, University of Hawaii at Manoa, Honolulu, HI, United States; I.M. Systems Group, Rockville, MD, United States
Recommended Citation:
Vargas M.,Miura T.,Shabanov N.,et al. An initial assessment of Suomi NPP VIIRS vegetation index EDR[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(22)