January 1, 2004
      
                  
        
  Author(s)
  Thomas B. Renegar,   Theodore V. Vorburger,   Son H. Bui
 
       
            
    
    
        This paper presents the development of a virtual surface calibration database for parameter evaluation and algorithm verification. The database runs from a web site at the National Institute of Standards and Technology (NIST), USA. Companies, universities