Figure 5. 
Figure 6. 
Helicopter spectrometer system operated by NASA/Johnson 
Space Center hovering over calibration standard. 
    
  
  
Field spectroradiometer system operated by Laboratory 
for Applications of Remote Sensing, Purdue University. 
  
Laboratory 
Spectrometer 
y Ns 
Truck 
Spectrometers 
V Ww 
Aircraft MSS & 
Helicopter 
Spectrometer 
Zw 
Landsat MSS 
  
  
  
  
Pressed BaS0, Painted Bas0, Canvas 
Laboratory Field Calibration Fields 
Standard Standard Standard 
  
  
  
  
  
  
  
  
Figure 7. Schematic of the basic procedures used for reflectance 
calibration of LACIE field measurements data.