WMOD00548

• Contract/Permit #: 6-07-DR-20020
• Project Name: Sierra Cooperative Pilot Project
• Title: Satelite Studies During the 1976-77, 1977-78 Sierra Cooperative Pilot Project
• Date: 2/1/1979
• Weather Modification - Doc Type: Report

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and along with a single landmark measurement for the day, gives the

navigation in the west-east direction along a scan line.

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Navigation in this case means that the program returns the

satellite line-element tape coordinates of desired earth locations for

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each image time. The 1977-78 data set is navigated by this method,

and the accuracy of the method is generally within 3-5 km.

C. Digital Image Display and Processing

L. The CSU ADVISAR

The ADVISAR (All Digital Video Imaging System for Atmospheric

Research) at Colorado State University is a versatile digital data

display and processing system. Eight solid-state memories under

computer control are the basis of the system. Each memory stores an

array of 512 x 512 eight-bit resolution elements, which are written at

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television refresh rates to a CRT. Both color and black and white

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monitors are the display end of the ADVISAR. 7 and 9 track tape drives

and a disk allow permanent data storage and transfer back and forth

from the memories.

The ADVISAR is an interactive system with a variety of controlling

programs run from a terminal keyboard. These programs exploit the

capabilities of the ADVISAR hardware to process and display digital

data. Programs are on permanent disk storage and are accessed by the

computer as they are needed. The computer drives all the peripheral

devices of the system, thereby controlling the transfer and modes of

display of the data.

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II. ADVISAR Capabilities

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With 8 memory planes available, the ADVISAR can be used to create

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a movie loop type of display via the monitors. Memories can be

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