PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM

OBJECT                = TEXT
   PUBLICATION_DATE    = 2016-03-04
   NOTE                = "Description of contents of BROWSE directory"
END_OBJECT            = TEXT
END

Each hyperspectral targeted (gimbaled) observation TRDR IF data product has 
one browse product in a directory structure that parallels that of the TRDR 
directory. That is, by year and DOY, e.g. /2006/2006_350/, with 
subdirectories for each observation named according to the combination of 
class type and observation ID unique to a single observation, 
e.g. "FRT00001270". 

Each VNIR (S-detector) TRDR has a TRU browse product visualization and each 
IR (L-detector) TRDR has a FAL browse product visualization. Like the 
TER/MTRDR browse products, three data files and one detached PDS label file 
describing the three files constitutes a single TRDR browse product set. The 
three data files are:
- The .IMG file which stores the browse image as a 3-band 8-bit raw binary 
PDS image object.
- The .HDR file which stores ENVI Header information associated with the IMG 
file. This file is provided as a convenience to users of the ENVI software 
and allows the TRDR browse products to be loaded directly into ENVI. 
- The .PNG file which stores the 3-band 8-bit browse image in Portable 
Network Graphics (PNG) format with an alpha transparency channel that 
corresponds to the non-scene edge pixels.

The spatial dimensions of each PNG and IMG file match the spatial dimensions 
of the source TRDR. 

A detailed description of the TRDR browse products is provided in the 
CRISM Data Product SIS.