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Classification of simulated and actual NOAA-6 AVHRR data for hydrologic land-surface feature definitionAn examination of the possibilities of using Landsat data to simulate NOAA-6 Advanced Very High Resolution Radiometer (AVHRR) data on two channels, as well as using actual NOAA-6 imagery, for large-scale hydrological studies is presented. A running average was obtained of 18 consecutive pixels of 1 km resolution taken by the Landsat scanners were scaled up to 8-bit data and investigated for different gray levels. AVHRR data comprising five channels of 10-bit, band-interleaved information covering 10 deg latitude were analyzed and a suitable pixel grid was chosen for comparison with the Landsat data in a supervised classification format, an unsupervised mode, and with ground truth. Landcover delineation was explored by removing snow, water, and cloud features from the cluster analysis, and resulted in less than 10% difference. Low resolution large-scale data was determined useful for characterizing some landcover features if weekly and/or monthly updates are maintained.
Document ID
19820055670
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ormsby, J. P.
(NASA Goddard Space Flight Center Hydrological Sciences Branch, Greenbelt, MD, United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1982
Subject Category
Earth Resources And Remote Sensing
Accession Number
82A39205
Distribution Limits
Public
Copyright
Other

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