OBJECT                     = DATASET                                          
 DATA_SET_ID               = 'MGN-V-RDRS-5-GDR-EMISSIVITY-V1.0'               
                                                                              
 OBJECT                     = DATASETINFO                                     
  DATA_SET_NAME          = 'MGN V RDRS 5 GLOBAL DATA RECORD EMISSIVITY V1.0'  
  DATA_SET_COLLECTION_MEMBER_FLG = N                                          
  EVENT_START_TIME          = 1990-09-13T16:22:14.871                         
  EVENT_STOP_TIME           = 1994-01-12                                      
  NATIVE_START_TIME         = 'N/A'                                           
  NATIVE_STOP_TIME          = 'N/A'                                           
  DATA_OBJECT_TYPE          = TABLE                                           
  DATA_SET_RELEASE_DATE     = 1992-01-15                                      
  PROCESSING_LEVEL_ID       = 4                                               
  PRODUCER_FULL_NAME        = 'Peter G. Ford'                                 
  PRODUCER_INSTITUTION_NAME = "Massachusetts Institute of Technology"         
  SOFTWARE_FLAG             = N                                               
  DETAILED_CATALOG_FLAG     = N                                               
  PROCESSING_START_TIME     = 1991-03-27T16:00:15                             
  PROCESSING_STOP_TIME      = 'UNK'                                           
  DATA_SET_DESC             = "Global Emissivity Data Record (GEDR).          
   The emissivity of a surface is defined as the thermal power emitted        
   by that surface divided by the power emitted by a black body of the        
   same size and at the same physical temperature. The polarization           
   direction is horizontal (E-field tangential to surface), and the           
   emissivity is not corrected for incidence angle or surface roughness       
   or tilt.                                                                   
                                                                              
   To make the GEDR images, Magellan radiometer data, in the form of          
   readings of antenna noise temperature, are corrected for antenna           
   sidelobe effects and for emission and absorption by the Venus              
   atmosphere. The component reflected from the surface is modeled as         
   a specular reflection with power reflection coefficient equal to           
   (1 - emissivity). The location and planetary radius at the antenna         
   boresight intercept point are derived from GTDR images and the             
   physical surface temperature is calculated using the adiabatic model       
   of Kliore et al., 1985.  The data are then filtered to remove              
   low-frequency instrument calibration errors, and re-sampled into           
   sinusoidal, Mercator, and north and south polar stereographic              
   projections at a resolution of about 5x5 kilometers per pixel.             
                                                                              
   Each GEDR image pixel is represented by a 16-bit integer. In               
   sinusoidal images, pixels lying outside the domain of the projection       
   are set to zero. In all images, pixels with unknown or unmeasured          
   values are also set to zero. The remaining values are related to           
   the emissivity by the following equation:                                  
                                                                              
       DN = (EMISSIVITY * 10000) + 1                                          
                                                                              
   See:  Software Interface Specification Document (Peter G. Ford,            
   1991, Global Altimetry and Radiometry Data Records, MIT-MGN-GxDR SIS       
   Version 2.3, 40 p.) that is included on GxDR CD-ROMs.                      
                                                                              
   Note:  There exist photoproducts that are identified as GxDRP (where       
   x is E (Emissivity), S (Slope), RE (Reflectivity), or T (Topography))      
   however, they are not generated from the digital GxDR products.  They      
   are instead produced from the Magellan ARCDR (Altimetry and Radiometry     
   Composite Data Record) data files."                                        
                                                                              
  CONFIDENCE_LEVEL_NOTE     = 'UNK'                                           
 END_OBJECT                 = DATASETINFO                                     
                                                                              
 OBJECT                     = DATASETTARG                                     
  TARGET_NAME               = 'VENUS'                                         
 END_OBJECT                 = DATASETTARG                                     
                                                                              
 OBJECT                     = DSPARMINFO                                      
  SAMPLING_PARAMETER_NAME   = 'PIXEL'                                         
  SAMPLING_PARAMETER_RESOLUTION = 9282                                        
  MINIMUM_SAMPLING_PARAMETER = 'N/A'                                          
  MAXIMUM_SAMPLING_PARAMETER = 'N/A'                                          
  SAMPLING_PARAMETER_INTERVAL = 4641                                          
  MINIMUM_AVAILABLE_SAMPLING_INT = 'N/A'                                      
  SAMPLING_PARAMETER_UNIT   = 'METER'                                         
  DATA_SET_PARAMETER_NAME   = 'EMISSIVITY'                                    
  NOISE_LEVEL               = 'UNK'                                           
  DATA_SET_PARAMETER_UNIT   = 'DIMENSIONLESS'                                 
 END_OBJECT                 = DSPARMINFO                                      
                                                                              
 OBJECT                     = SCDSHOST                                        
  INSTRUMENT_HOST_ID        = 'MGN'                                           
  INSTRUMENT_ID             = 'RDRS'                                          
 END_OBJECT                 = SCDSHOST                                        
                                                                              
 OBJECT                     = DSREFINFO                                       
  REFERENCE_KEY_ID          = 'FORD1991'                                      
                                                                              
  OBJECT                     = REFERENCE                                      
   DOCUMENT_TOPIC_TYPE       = 'Software Interface Specification'             
   JOURNAL_NAME              = 'Project Magellan SIS Document'                
   PUBLICATION_DATE          = 1991                                           
   REFERENCE_DESC            = "Peter G. Ford, Global Altimetry and           
    Radiometry Data Record, Project Magellan Software Interface               
    Specification Document MIT-MGN-GxDR, 1991 Version 2.3, 40p."              
                                                                              
   OBJECT                     = REFAUTHORS                                    
    AUTHOR_FULL_NAME          = 'Peter G. Ford'                               
   END_OBJECT                 = REFAUTHORS                                    
                                                                              
  END_OBJECT                 = REFERENCE                                      
                                                                              
 END_OBJECT                 = DSREFINFO                                       
                                                                              
 OBJECT                     = DSREFINFO                                       
  REFERENCE_KEY_ID          = SAUNDERSETAL1990                                
                                                                              
  OBJECT                     = REFERENCE                                      
   DOCUMENT_TOPIC_TYPE       = 'Mission Science'                              
   JOURNAL_NAME              = 'Journal of Geophysical Research'              
   PUBLICATION_DATE          = 1990                                           
   REFERENCE_DESC            = "Saunders, R.S., G.H. Pettengill, R.E.         
    Arvidson, W.L. Sjogren, W.T.K. Johnson, L. Pieri, The Magellan            
    Venus Radar Mapping Mission, Journal of Geophysical Research,             
    1990, Vol 95, pp. 8339-8335"                                              
                                                                              
   OBJECT                     = REFAUTHORS                                    
    AUTHOR_FULL_NAME          = 'R. Stephen Saunders'                         
   END_OBJECT                 = REFAUTHORS                                    
                                                                              
   OBJECT                     = REFAUTHORS                                    
    AUTHOR_FULL_NAME          = 'Gordon H. Pettengill'                        
   END_OBJECT                 = REFAUTHORS                                    
                                                                              
   OBJECT                     = REFAUTHORS                                    
    AUTHOR_FULL_NAME          = 'Raymond E. Arvidson'                         
   END_OBJECT                 = REFAUTHORS                                    
                                                                              
   OBJECT                     = REFAUTHORS                                    
    AUTHOR_FULL_NAME          = 'William T. K. Johnson'                       
   END_OBJECT                 = REFAUTHORS                                    
                                                                              
   OBJECT                     = REFAUTHORS                                    
    AUTHOR_FULL_NAME          = 'Leslie J. Pieri'                             
   END_OBJECT                 = REFAUTHORS                                    
                                                                              
  END_OBJECT                 = REFERENCE                                      
                                                                              
 END_OBJECT                 = DSREFINFO                                       
                                                                              
END_OBJECT                 = DATASET                                          
                                                                              
END