:Data Set Overview::The data from the Rosetta Navigation Camera (NavCam) was extracted byBernhard Geiger; the data set was constructed and submitted by MaudBarthelemy on behalf of the Planetary Science Archives (PSA).The data have been observed and measured from 24th Oct 2014 to 21stNov 2014. The frequency of the navigation slots was of (nominalcadence interrupted by manoeuvres): - from 2014-10-24T10:00:00 to 2014-11-03T12:00:00 : one 2x2 raster with four images every four hours - from 2014-11-03T12:00:00 to 2014-11-15T12:00:00 : one 2x2 raster with four images every two hours - from 2014-11-15T12:00:00 to 2014-11-21T23:25:00 : one 2x2 raster with four images every four hours - on 2014-11-12 (lander separation and descent): 26 additional images (7.5 rasters).This makes 4*229+26:942 navigation images.8 navigation images (two rasters) and 3 context images were lost on2014-11-20 because the NAVCAM was switched off due to an anomaly.54 context images are with lost rows due to an anomaly in the transferto the spacecraft memory, which only occurred for context images.The comet distance rages were from 10 km to 50 km.The trajectory described circular orbits at about 10km. Then, it wentto a 30km orbit inclined with respect to terminator plane, followed bya close fly-by at 16.5km distance for Lander delivery. This wasfollowed by an outbound trajectory at 50km and a re-insertion intobound orbit at 30km.All images in this data set are raw and uncalibrated data taken usingthe imaging mode. The data set contains images resolved using bothNavCams onboard the Rosetta S/C and the DATA directory is organisedto reflect this with two sub directories: - CAM1 - CAM2For each image, the user can also find the FITS format of theobservation.:Filename Convention::The filenaming convention for all data levels is given by: __. ROS CAM1 YYYYMMDDThhmmss IMG CAM2 LBL (JPG)Examples: ROS_CAM1_20140223T081016.IMG ROS_CAM1_20140223T081016.LBL ROS_CAM1_20140223T081016F.FIT ROS_CAM1_20140223T081016F.LBL (ROS_CAM1_20140223T081016.JPG) ROS_CAM2_20140223T094017.IMG ROS_CAM2_20140223T094017.LBL ROS_CAM2_20140223T094017F.FIT ROS_CAM2_20140223T094017F.LBL (ROS_CAM2_20140223T094017.JPG)(In the case of the BROWSE directory):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 comet nucleus in equatorial J2000 inertial frame.- SC TARGET VELOCITY VECTOR: The spacecraft to comet nucleus velocity vector in in equatorial J2000 inertial frame.- TARGET CENTER DISTANCE: The distance between the spacecraft and the comet nucleus centre. (Note that also for checkout and stellar calibration images the comet nucleus distance is given here.)- SUB SPACECRAFT LATITUDE and SUB SPACECRAFT LONGITUDE: The latitudeand longitude of the sub-spacecraft point derived from the FlightDynamics body-fixed reference frame implicitly specified by theinformation provided in the comet attitude file CATT.- RIGHT ASCENSION and DECLINATION: Right Ascension and Declination ofthe 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 found as expected. Any exceptions are noted by the DATA_QUALITY field in the label files.