REPORT OF ISPRS WORKING GROUP II/3 
INSTRUMENTS FOR ANALYSIS OF REMOTELY SENSED DATA 
Fred C. Billingsley, Chairman, WG II/3 
Jet Propulsion Laboratory 
California Institute of Technology 
Pasadena, California, 91109, U.S.A. 
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INTRODUCTION 
In 1981 the former WG II/4 was reconstituted into two groups, II/3 - 
Instruments for Processing and Analysis of Remotely Sensed Data, and II/4 =- 
Instruments for Processing, Storage, and Dissemination of Remotely Sensed 
Data. Concurrently, the areas of interest were divided. WG II/3 will be 
concerned with the systems, components, devices, and configurations of 
hardware and software for analysis. Primary consideration will be on 
digital analysis because of the importance of this analysis method, 
although optical or other processing will be included as appropriate. 
Accordingly, the topics of interest are listed below. The breakdown is 
slightly different than that reported in the 1982 Commission II Symposium. 
A major emphasis will be on remotely sensed images, representing the 
growing importance anc technological requirements of that data source. 
TOPICS OF INTEREST TO WC II/3 
1. Systems 
A. Large, Multi-user Systems 
These are characterized by being "facility" systems, serving many users, 
containing multiple peripherals, multiple terminals and networking 
capabilities. Included are image analysis systems which are intended to be 
served by host computers, and the various computer architecture approaches. 
i. System Architecture 
ii. Parallel and Array Processors; Processor Architectures 
iii. System Software - Modular Techniques, Interfaces to Users 
B. Single User Systems and Workstations 
These are characterized by the use of microprocessors, and includes those 
systems primarily intended for stand-alone use. They may be relatively low 
cost comapred to mainframe systems, with correspondingly lover 
capabilities. Storage media typically are floppy disks and "Winchester" 
style hard disks. The low cost of the microprosessors make special 
multiprocessor configurations practical, although few multiprocessor 
systems are yet available. 
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