The design of an intelligent multidisk control model for VME bus based systems

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Authors
Brooks, Steven L.
Subjects
VME bus
flexible disk drive
disk controller
concurrent disk operations
Advisors
Abbott, Lawrence W.
Date of Issue
1987-12
Date
Publisher
Monterey, Calif. : Naval Postgraduate School
Language
en_US
Abstract
Multispectral analysis methods are exercised using AVHRR channels 3, 4, and 5 to improve upon single-wavelength thermal imagery at night. An algorithm was developed yielding cloud location and water vapor distribution from channel 3-4 and 4-5 differences, respectively. Water vapor effects on pixel registration for cloud were examined using two candidate subscenes, one cloudy and dry, the other, cloudy and moist. A positive water vapor/cloud-free correlation was found using statistical techniques on the candidate subscene scatter plots. TOVS water vapor channels verified the analyzed water vapor pattern in the 4 - 5 difference image. V-shaped cloud/clear thresholds were applied to various subscene scatter plots to account for the positive correlation of water vapor-to-cloud registration. Results showed that in regions of higher water vapor concentrations, pixels nearest cloud boundaries were likeliest to be misclassified as clear. Images containing significant water vapor gradients and cloud variations required threshold refinement for best results
The design of an intelligent multidisk control module for V.VIE bus based systems is presented. The control module is designed to support concurrent disk operations on up to four flexible disk drives with multiple VME bus MASTERS. The design is presented for a UNIX compatible operating system but the operating system interface is kept simple enough that the multidisk control module can be used with most modern operating systems with minimal changes required.
Type
Thesis
Description
Series/Report No
Department
Electrical and Computer Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
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Format
90 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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