PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = STREAM                                                
OBJECT                = TEXT                                                  
  PUBLICATION_DATE    = 2019-01-31                                            
  NOTE                = "Description of the DOCUMENT directory contents."     
END_OBJECT            = TEXT                                                  
END                                                                           
                                                                              
The BROWSE directory contains GRaND quick-look reports. These reports include 
a graphical overview of GRaND observations and state information for a given  
interval. The intervals convered in these reports are the same as the         
intervals covered in the data files located in the DATA directory.            
                                                                              
Reports are organized into separate subdirectories for each mission sub-phase.
The reports are provided as PDF files. The reports files are named according  
to the convention:                                                            
                                                                              
   GRD_lll_yymmdd1_yymmdd2_REPORT.PDF                                         
                                                                              
where:                                                                        
                                                                              
   lll       = data processing level (L-1A)                                   
                                                                              
   yymmdd1   = start date of report interval                                  
                                                                              
   yymmdd    = stop date of report interval                                   
                                                                              
Notes:
1. The high voltages values for HVPS1-6 shown in red on the strip charts are  
   inaccurate.  During nominal operations, they are always lower than the     
   commanded set-point (green trace) by about 10% when GRaND is configured    
   for science data acquisition.  The setpoints are more accuruate indicators 
   of the applied high voltages than the values read-out and reported in the  
   state-of-health telemetry.                                                 
2. The BGO pulse height spectrum and the BGO-CZT pair spectra are displayed   
   as a function of pulse height with gamma ray energy units (keV).  A linear 
   calibration function based on laboratory measurements was used to convert  
   pulse height (ADC data number) to keV.  The gain and offset for sensors    
   varies during flight.  So, the energy scale is for display purposes only   
   and cannot be used for quantitative analyses.  The histograms and event    
   data in the Level 1A are uncalibrated.                                     
3. The browse reports contain a labeling error.  The CAT10 (CZT) pulse height 
   spectra are displayed in order by their detector IDs: 0, 1, 2, ..., 14, 15;
   however, the labels are incorrect.  The mapping between the incorrect      
   labels in the browse report and the correct CZT IDs follows:               
                                                                              
   Label        ID                                                            
   ====================                                                       
   CZT11       0                                                              
   <blank space>                                                              
   CZT3        2                                                              
   CZT1        3                                                              
   CZT2        4                                                              
   CZT8        5                                                              
   CZT10       6                                                              
   CZT0        7                                                              
   CZT15       8                                                              
   <blank space>                                                              
   CZT7       10                                                              
   CZT5       11                                                              
   CZT6       12                                                              
   <blank space>                                                              
   CZT14      14                                                              
   CZT4       15                                                              
                                                                              
   Blank spaces appear in the report for CZT sensors that have been disabled  
   (IDs 1, 9, and 13).  The labels were corrected in browse reports generated 
   after 10-Nov-2017.