The results from three different missions will be illustrated 

 briefly in this talk. The first from the Thermal Mapper shows Boston 

 Harbor in the infrared as observed during a night time flight at low water 

 ebb tide. The other two examples are taken from multispectral missions. 

 One is in the area of agriculture and the other in the area of limnology. 



On the morning of 11 June 1969 at 0230 hours a Bendix airplane 

 equipped with a Thermal Mapper flew a total area cover mission of the 

 Boston Harbor area. The time of the flight was selected to give coverage 

 at low water slack tide. The detector in the mapper was an indium anti- 

 monide device cooled with liquid nitrogen. It was operating unfiltered. 

 In the absence of reflectance solar IR this gives thermal coverage out to 

 about 5.5 microns. Figure 1 is a sample of this imagery. 



Excellent thermal contrast was obtained in the water of the harbor, 

 In this imagery the dark areas correspond to warmer areas and the lighter 

 areas correspond to cool spots. In general, the water was warmer than 

 the land. When the complete set of data is assembled in an area cover 

 mosaic the spatial distribution of the thermal mixing is expected to show 

 the flow patterns into and out of the harbor as the tide flows. 



LARS, the laboratory for agriculture remote sensing at Purdue 

 University, maintains a set of ground truth over a number of well defined 

 flight lines in rural Tippicanoe County where Lafayette, Indiana is located. 



27-3 



