These are the variables included for the ISCCP Stage C2 data:
                                                                                
Variable #  Code *  Description *                                           
----------  ------  ------------------------------------------------------- 
  1                 Latitude index (equal-area)   
  2                 Longitude index (equal-area)                            
  3                 Lower longitude index (2.5 deg square)                  
  4                 Upper longitude index (2.5 deg square)                  
  5                 Land/water/coast code                                   
  6                 GMT 00-21:  Total number of days in average (day+night) 
                    GMT all:    Total number of GMTS in average (day+night) 
  7                 GMT 00-21:  Total number of days in average (day)       
                    GMT all:    Total number of GMTS in average (day)       
  8                 Mean frequency of cloudy pixels (Adj2. Adj6)            
  9                 GMT 00-21:  Number of days with cloudy pixels > 0       
                    GMT all:    Mean freq of cloudy days                    
  10                Marginal VIS/IR cloud amount                            
  11                Mean PC for cloudy pixels (Adj1, Adj2, Adj6)            
  12                Time-sigma PC for IR-cloudy pixels                      
  13                Mean space-sigma PC for IR-cloudy pixels                
  14                Mean TC for cloudy pixels (Adj1, Adj2, Adj4, Adj6)      
  15                Time-sigma TC for IR-cloudy pixels                      
  16                Mean space-sigma TC for IR-cloudy pixels                
  17                Mean TAU for VIS/IR-cloudy pixels (Adj3, Adj4, Adj6)    
  18        D       Time-sigma TAU for VIS/IR-cloudy pixels                 
  19        D       Mean space-sigma TAU for VIS/IR-cloudy pixels           
  20                Mean path for VIS/IR-cloudy pixels                      
  21        D       Time-sigma path for VIS/IR-cloudy pixels                
  22        D       Mean space-sigma path for VIS/IR-cloudy pixels          
  23                Avg freq of low level cloudiness                        
  24                Avg PC of low level cloudiness                          
  25                Avg TC of low level cloudiness                          
  26                Avg freq of middle level cloudiness                     
  27                Avg PC of middle level cloudiness                       
  28                Avg TC of middle level cloudiness                       
  29                Avg freq of high level cloudiness                       
  30                Avg PC of high level cloudiness                         
  31                Avg TC of high level cloudiness                         
  32        D       Avg freq of cumulus cloudiness                          
  33        D       Avg PC of cumulus cloudiness                            
  34        D       Avg TC of cumulus cloudiness                            
  35        D       Avg TAU of cumulus cloudiness                           
  36        D       Avg freq of stratus cloudiness                          
  37        D       Avg PC of stratus cloudiness                            
  38        D       Avg TC of stratus cloudiness                            
  39        D       Avg TAU of stratus cloudiness                           
  40        D       Avg freq of altocumulus cloudiness                      
  41        D       Avg PC of altocumulus cloudiness                        
  42        D       Avg TC of altocumulus cloudiness                        
  43        D       Avg TAU of altocumulus cloudiness                       
  44        D       Avg freq of nimbostratus cloudiness                     
  45        D       Avg PC of nimbostratus cloudiness                       
  46        D       Avg TC of nimbostratus cloudiness                       
  47        D       Avg TAU of nimbostratus cloudiness                      
  48        D       Avg freq of cirrus cloudiness                           
  49        D       Avg PC of cirrus cloudiness                             
  50        D       Avg TC of cirrus cloudiness                             
  51        D       Avg TAU of cirrus cloudiness                            
  52        D       Avg freq of cirrostratus cloudiness                     
  53        D       Avg PC of cirrostratus cloudiness                       
  54        D       Avg TC of cirrostratus cloudiness                       
  55        D       Avg TAU of cirrostratus cloudiness                      
  56        D       Avg freq of deep convective cloudiness                  
  57        D       Avg PC of deep convective cloudiness                    
  58        D       Avg TC of deep convective cloudiness                    
  59        D       Avg TAU of deep convective cloudiness                   
  60                Mean TS from clear sky composite (Adj4, Adj6)           
  61                Time-sigma TS from clear sky composite                  
  62        D       Mean RS from clear sky composite (Adj4, Adj5)           
  63                Mean snow/ice cover                                     
  64                Surface pressure (TOVS)                                 
  65                Near-surface air temperature (TOVS extrapolated)        
  66                Temperature at 500 mb (TOVS)                            
  67                Tropopause pressure (TOVS)                              
  68                Tropopause temperature (TOVS)                           
  69                Stratosphere temperature at 15 mb (TOVS)                
  70                Precipitable water - column (TOVS)                      
  71                Ozone - column (TOVS)                                   
  72                Mean freq of cloud pixels - unadjusted                  
                                                                               
* The following applies to ISCCP-C2 variables:                                  
                                                                                
   D:          indicates variables present only during local daytime            
   TAU:        cloud optical thickness                                          
   PATH:       cloud water path                                                 
   PC:         cloud top pressure                                               
   TC:         cloud top temperature                                            
   TS:         surface temperature                                              
   RS:         surface reflectance                                              
   SIGMA:      standard deviation over spatial or time domains                  
   GMT 00-21:  indicates hour-monthly mean datasets                             
   GMT ALL:    indicates monthly mean datasets