TM

The TM imagery consists of 7 channels that correspond to 7 spectral bands. The resolution is 30m and five bands need to be corrected (band 6 corresponds to the thermal channel and the atmosphere does not have much scattering effect on band 7). Standard TM image has about 50 M Pixels per band or 300 M Pixels total (excluding band 6).

Figure 1 presents a scene of TM imagery acquired on Aug. 17, 1989 in the Amazon Basin area, which is partially covered by hazy aerosols and some thin clouds. Aerosol has much larger disturbances in shorter wavelength. Although some cloud residues are visible in channel 7, aerosol effects have almost disappeared. 


    


 	   Band 1			    Band 2 


    


           Band 3			    Band 4 


    


           Band 5			    Band 7 


 	       Figure 1: TM imagery (512 X 512).
last updated 10/31/95

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hfallaah@umiacs.umd.edu