Patent ID: 11971321
Assignee: RAYTHEON COMPANY
Field: Measurement (Instruments)
Classification: CPC F  G  H | IPC F  G  H

Claim 18:
19. The system of claim 18, wherein the at least one processor is further configured to determine the reflectance by calculating a quantity, ρ
    ⁡
    
      (
      λ
      )
    
  
  =
  
    
      
        4
        ⁢
        
          H
          2
        
      
      
        R
        2
      
    
    ⁢
    
      
        (
        
          
            
              E
              
                m
                +
                b
              
            
            ⁡
            
              (
              
                H
                ,
                λ
              
              )
            
          
          -
          
            
              E
              b
            
            ⁡
            
              (
              
                H
                ,
                λ
              
              )
            
          
        
        )
      
      
        
          E
          S
        
        ⁡
        
          (
          λ
          )
        
      
    
  

where:
quantity λ is a wavelength,
quantity ρ(λ) is a reflectance of the mirror target as a function of wavelength,
quantity H is a distance from the irradiance spectrometer to an image of the sun as formed by the mirror target,
quantity R is a radius of curvature of the at least one curved mirror in the mirror target,
quantity ES(λ) is the first irradiance measurement,
quantity Em+b(H, λ) is the second irradiance measurement, and
quantity Eb(H, λ) is the third irradiance measurement.