:Data Set history::This data set is version V1.1. The changes from the V1.0 are listedbelow: - 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 - GEO_NAVCAM*_INDEX and NAVCAM*_INDEX added into the INDEX directory.: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 30th June 2015 to 28thJuly 2015. The frequency of the navigation slots was of one imageevery five hours, with interruption by manoeuvres. 128 navigationimages, 159 context images and 33 calibration images were taken. Thismakes a total of 320 images.Three navigation images were not acquired due to the recovery ofanomalies. One navigation image were skipped because of a Star TrackerCCD read-out.Three context images were not acquired due to the recovery ofanomalies and three context images were taken with lost rows.The orbiter was executing far fly-by arcs at distances between 150kmand 200km The spacecraft was in the terminator plane and at positivelatitudes of the sub-satellite point.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 - CAM2CAM2 directory is only present if CAM2 observations are done.After hibernation exit CAM2 was only switched on to confirm its healthstatus in a check-out. During the comet escort phase CAM2 will only beused in the case of a failure of the nominal camera CAM1.For each image, the user can also find the FITS format of theobservation in the EXTRAS directory.:Filename Convention::In DATA:The filenaming convention for all data levels is given by: __. ROS CAM1 YYYYMMDDThhmmss IMG CAM2 LBLExamples: ROS_CAM1_20140223T081016.IMG ROS_CAM1_20140223T081016.LBL ROS_CAM2_20140223T094017.IMG ROS_CAM2_20140223T094017.LBLIn BROWSE:The filenaming convention for all data levels is given by: __. ROS CAM1 YYYYMMDDThhmmss JPG CAM2 LBLExamples: ROS_CAM1_20140223T081016.LBL ROS_CAM1_20140223T081016.JPG ROS_CAM2_20140223T094017F.LBL ROS_CAM2_20140223T094017.JPGIn EXTRAS:The filenaming convention for all data levels is given by: __F. ROS CAM1 YYYYMMDDThhmmss FIT CAM2 LBLExamples: 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 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.