b. Performance Potential 



Present optical technology permits the fabrication of a 

 variety of optical and electrooptical sensors that can perform many use- 

 ful functions in support of enforcement of the 200-nmi fishing zone. 

 Sensor platforms include: high-altitude (quasi-synchronous) and low- 

 altitude (100-400 nmi) satellites; high-altitude and long-duration patrol 

 and reconnaissance aircraft; and low-altitude, high-performance recon- 

 naissance aircraft. The apparent, most-appropriate sensor/platform com- 

 binations and corresponding preferred functions are shown in Table 13. 

 The performance potential of these sensor/platform combinations are dis- 

 cussed below. 



(1) Satelliteborne Sensors 



Photographic Sensors --Although certain military re- 

 connaissance functions are performed by high-resolution, film-type cameras 

 in low-orbit satellites, the film return process, involving reentry 

 packages and aerial retrieval systems, incur costs on the order of $100 

 million, for a continuous coverage capability. For this reason, and also 

 because the instantaneous field of view of such systems is very small 

 (a few square miles), the only spaceborne systems considered here are 

 TV and line-scan types in existing or presently envisaged NASA spacecraft. 



Electrooptical Sensors --The primary NASA vehicles 

 are the LANDSAT series (previously ERTS) and the upcoming SEASAT program; 

 it is assumed that weather satellite data of value (for airborne patrol 

 planning, as an example) are already available and in use. 



Approximately an area of 5 x 5 nmi for film resolution of 5 x 5 ft. 



72 



