An operational scheme for deriving standardised surface reflectance from landsat TM/ETM+ and SPOT HRG imagery for eastern Australia

Flood, Neil, Danaher, Tim, Gill, Tony and Gillingham, Sam (2013) An operational scheme for deriving standardised surface reflectance from landsat TM/ETM+ and SPOT HRG imagery for eastern Australia. Remote Sensing, 5 1: 83-109. doi:10.3390/rs5010083

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Author Flood, Neil
Danaher, Tim
Gill, Tony
Gillingham, Sam
Title An operational scheme for deriving standardised surface reflectance from landsat TM/ETM+ and SPOT HRG imagery for eastern Australia
Journal name Remote Sensing   Check publisher's open access policy
ISSN 2072-4292
Publication date 2013-01-01
Sub-type Article (original research)
DOI 10.3390/rs5010083
Open Access Status DOI
Volume 5
Issue 1
Start page 83
End page 109
Total pages 27
Place of publication Switzerland
Publisher Multidisciplinary Digital Publishing Institute
Collection year 2014
Language eng
Formatted abstract
Operational monitoring of vegetation and land surface change over large areas can make good use of satellite sensors that measure radiance reflected from the Earth’s surface. Monitoring programs use multiple images for complete spatial coverage over time. Accurate retrievals of vegetation cover and vegetation change estimates can be hampered by variation, in both space and time, in the measured radiance, caused by atmospheric conditions, topography, sensor location, and sun elevation. In order to obtain estimates of cover that are comparable between images, and to retrieve accurate estimates of change, these sources of variation must be removed. In this paper we present a preprocessing scheme for minimising atmospheric, topographic and bi-directional reflectance effects on Landsat-5 TM, Landsat-7 ETM+ and SPOT-5 HRG imagery. The approach involves atmospheric correction to compute surface-leaving radiance, and bi-directional reflectance modelling to remove the effects of topography and angular variation in reflectance. The bi-directional reflectance model has been parameterised for eastern Australia, but the general approach is more widely applicable. The result is surface reflectance standardised to a fixed viewing and illumination geometry. The method can be applied to the entire record for these instruments, without intervention, which is of increasing importance with the increased availability of long term image archives. Validation shows that the corrections improve the estimation of reflectance at any given angular configuration, thus allowing the removal from the reflectance signal of much variation due to factors independent of the land surface. The method has been used to process over 45,000 Landsat-5 TM and Landsat-7 ETM+ scenes and 2,500 SPOT-5 scenes, over eastern Australia, and is now in use in operational monitoring programs.
Keyword Landsat TM
SPOT HRG
Surface reflectance
Radiometric correction
Atmospheric
BRDF
Topographic
Radiometric correction
Nadir reflectance
Satellite imagery
BRDF correction
Albedo
Modis
Archive
Terrain
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
Official 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 39 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 37 times in Scopus Article | Citations
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Created: Sun, 31 Mar 2013, 10:23:20 EST by System User on behalf of School of Geography, Planning & Env Management