The most promising remote sensing techniques that may he applied 

 to the ocean are given in Tahle 2. Of the sensors listed, only three, 

 the infrared radiometer/imager, and the television and photographic 

 cameras, have heen used on satellites. These three sensors, the 

 satellites on which they have heen used, and some of the methods with 

 which they are "being employed oceanographically, are discussed in the 

 following sections. 



Table 2. Remote Oceanographic Sensors 



Passive Sensors 

 1. Infrared Radiometer/imager* 

 2» Television Camera* 

 3. Photographic Camera* 

 k. Microwave Radiometer 



Active Sensors 



1. Radar Imager 



2. Radar S catterometer 



3. Laser Altimeter 



Have been or are heing used ahoard satellites 



