PDS_VERSION_ID                = PDS3
RECORD_TYPE                   = STREAM
OBJECT                        = TEXT
  PUBLICATION_DATE            = 2004-09-30
  NOTE                        = "Description of the data directory 
                                 contents for the Cassini Imaging Science
                                 Subsystem EDR archive"
END_OBJECT                    = TEXT
END
 
 
                   DATA Directory Contents


  Volume ID:    COISS_2043
  Range (SCLK): 1585391197 - 1585679889
  Range (UTC):  2008-088T09:49:34.665 - 2008-091T18:01:06.176 

 
The data directory contains the EDR image data files and accompanying detached
PDS label files.  These files are organized on the archive volumes in 
subdirectories in Spacecraft Clock (SCLK) order.  Spacecraft Clock is the 
fundamental time measurement mechanism used for the Cassini spacecraft.  SCLK 
times translate to a specific UTC time.

Each subdirectory contains up to 128 image files and the corresponding 128 
image label files, for a maximum of 256 files per subdirectory (per PDS 
limitations).  

Given the fact that the ISS EDR image size varies, the total number of images 
per volume varies. Approximately 3,000 to 5,000 images can be found on each 
DVD volume, with individual volumes filled to maximum capacity. 

For more discussion on the EDR images and PDS label files created by the 
Cassini Instrument Operations Team (IO), refer to the EDR Data Product 
Software Interface Agreement (JPL D-24724).


Subdirectory Naming Convention
------------------------------
Convention: <start SCLK>_<stop SCLK>
  start SCLK = start SCLK of subdirectory coverage
  stop SCLK = stop SCLK of subdirectory coverage

Example: /1294561143_1351738471/



EDR Image File Naming Convention
--------------------------------
Convention: <camera><image SCLK>_<version>.IMG
  camera = one letter abbreviation for camera used to take image(N=NAC, W=WAC)
  image SCLK = 10-digit value of spacecraft clock at time of shutter close
  version = version number of the file

Example: N1832898283_4.IMG

