======================================================================
Data Set history:
======================================================================

This data set is version V1.1. The changes from the V0.0 are listed
below:
    - Full size BROWSE images
    - FITS versions added in EXTRAS directory
    - label content consistent with comet phase datasets
    - target names and types revised, mainly for 'CALIBRATION' of V1.0
    - ERRATA of V1.0 addressed and removed (image orientation and
      geometry keywords).
    - updated EAICD version

======================================================================
Data Set Overview:
======================================================================

The data from the Rosetta Navigation Camera (NavCam) was extracted by
Bernhard Geiger; the data set was constructed and submitted by Maud
Barthelemy on behalf of the Planetary Science Archives (PSA).

The data have been observed and measured from 25th July 2004 to 1st August
2004. The data have been observed and measured during the first part of the
Cruise Phase on Rosetta's journey to comet CG/CP67.

All images in this data set are raw and uncalibrated data taken using
the imaging mode. The data set contains images resolved using both
NavCams onboard the Rosetta S/C and the DATA directory is organised
to reflect this with two sub directories:
 - CAM1
 - CAM2
CAM2 directory is only present if CAM2 observations are done.

For each image, the user can also find the FITS format of the
observation in the EXTRAS directory.

======================================================================
Filename Convention:
======================================================================

In DATA:
The filenaming convention for all data levels is given by:

           __.
              ROS     CAM1    YYYYMMDDThhmmss    IMG
                      CAM2                       LBL

Examples:
        ROS_CAM1_20140223T081016.IMG
        ROS_CAM1_20140223T081016.LBL
        ROS_CAM2_20140223T094017.IMG
        ROS_CAM2_20140223T094017.LBL

In BROWSE:
The filenaming convention for all data levels is given by:

           __.
              ROS     CAM1    YYYYMMDDThhmmss    JPG
                      CAM2                       LBL

Examples:
        ROS_CAM1_20140223T081016.LBL
        ROS_CAM1_20140223T081016.JPG
        ROS_CAM2_20140223T094017.LBL
        ROS_CAM2_20140223T094017.JPG


In EXTRAS:
The filenaming convention for all data levels is given by:

           __F.
              ROS     CAM1    YYYYMMDDThhmmss       FIT
                      CAM2                          LBL

Examples:
        ROS_CAM1_20140223T081016F.FIT
        ROS_CAM1_20140223T081016F.LBL
        ROS_CAM2_20140223T094017F.FIT
        ROS_CAM2_20140223T094017F.LBL

======================================================================
Geometry Information - Coordinate System:
======================================================================

The label files include the following geometric variables:
- SC SUN POSITION VECTOR: The vector from the spacecraft to the Sun
  in equatorial J2000 inertial frame.
- SC TARGET POSITION VECTOR: The vector from the spacecraft to the
  centre of the target in equatorial J2000 inertial frame.
- SC TARGET VELOCITY VECTOR: The spacecraft to target velocity
  vector in in equatorial J2000 inertial frame.
- TARGET CENTER DISTANCE: The distance between the spacecraft and the
  target centre.
- SUB SPACECRAFT LATITUDE and SUB SPACECRAFT LONGITUDE: The latitude
and longitude of the sub-spacecraft point (as computed by SPICE).
- RIGHT ASCENSION and DECLINATION: Right Ascension and Declination of
the camera boresight direction in equatorial J2000 inertial frame.
- CELESTIAL NORTH CLOCK ANGLE: The direction of celestial north at the
  center of the image - measured from the upward direction,
  clockwise to the direction toward celestial north.
- SOLAR ELONGATION: The angle between the line of sight of observation
  and the direction of the Sun.
All geometric values are calculated for the time t = IMAGE TIME
(and not START TIME).

======================================================================

All data have been validated by
                ESA and an external scientific review. It has been
                found as expected. Any exceptions are noted by
                the DATA_QUALITY field in the label files.