:Data Set history::First version:Data Set Overview::The data from the Rosetta Navigation Camera (NavCam) were calibrated byBernhard Geiger; the processing pipeline was implemented by Rafael Andres;the data set was constructed and submitted by Diego Fraga Agudo on behalfof the Planetary Science Archives (PSA).The data were acquired between 2016-06-28 and 2016-07-26. The frequency ofnavigation slots was one 2x2 raster every five hours, with interruption bymanoeuvres. One planned navigation raster was replaced with Lander searchobservations. There were no more context images scheduled. 520 navigation and7 calibration images were acquired, giving a total of 527 images.The spacecraft performed two and a half 26x9km elliptical orbits in theterminator plane before transitioning to circular 9-10km orbits.All images in this data set are radiometrically calibrated data taken usingthe imaging mode. The data set contains images using NavCam CAM1onboard the Rosetta S/C. NavCam instrument contains a second identical cameracalled CAM2 but this was used mainly as a backup and the few images taken withit have not been calibrated and are not included in the Level 3 datasets.The images can be found in the DATA/CAM1 directory.For each image, the user can also find the FITS format of theobservation in the EXTRAS/CAM1 directory.:Filename Convention::In DATA:The filenaming convention for all data levels is given by: __. ROS CAM1 YYYYMMDDThhmmss C IMG CAM2 Q LBLWhere X can be C, Q or be absent. It is present for level 3 data (C for imageand label file, Q for quality map). It is absent for level 2 products.Examples: ROS_CAM1_20160308T154502C.IMG ROS_CAM1_20160308T154502Q.IMG ROS_CAM1_20160308T154502C.LBLIn BROWSE:The filenaming convention for all data levels is given by: __C. ROS CAM1 YYYYMMDDThhmmss PNG CAM2 LBLExamples: ROS_CAM1_20160308T154502C.PNG ROS_CAM1_20160308T154502C.LBLIn EXTRAS:The filenaming convention for all data levels is given by: __CF. ROS CAM1 YYYYMMDDThhmmss FIT CAM2 LBLWhere C indicates it is a calibrated image file and F indicates it is in FITSformat.Examples: ROS_CAM1_20160308T154502CF.FIT ROS_CAM1_20160308T154502CF.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 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. Aditionally, the data and its documentation was scientifically peer reviewed and all issues found were solved.