Required Reading : The format of all VIRTIS data are described in detail by the EAICD document located in the /DOCUMENT directory. VIRTIS team strongly recommends reading this documentation before using the data. Data Set Overview : This data set contains raw data acquired by the Rosetta Orbiter VIRTIS spectrometer during the PRELANDING COMMISSIONING of the Rosetta mission. Processing : The data in this data set are raw, CODMAC Level 2 data. As such, the data has been calibrated. Data : The data are in PDS format. A detailed description of the data format is given in the VIRTIS EAICD document located in the DOCUMENT directory of this data set. Ancillary Data : No ancillary data included in this data set. Coordinate System : The geometry items SC_SUN_POSITION_VECTOR, SC_TARGET_POSITION_VECTOR and SC_TARGET_VELOCITY_VECTOR provided in the label of the data product are relative to the Earth Mean Equator frame of J2000. SUB_SPACECRAFT_LATITUDE, SUB_SPACECRAFT_LONGITUDE are given in the PLANETOCENTRIC coordinate system. These parameters are corrected by planetary and stellar aberrations. Distances are given in km, angles in degrees. Software : The data can be accessed with the software IDL routines provided and documented in the EXTRAS directory. History : Version 2.0 - First data delivery

Confidence Level Overview : Data confidence is nominal, meaning that for all data have been validated by the VIRTIS team and found as expected. Any exceptions are noted by the DATA_QUALITY field in the label files. Data Coverage and Quality : Data quality is good unless otherwise noted by the DATA_QUALITY keyword. Limitations : No limitations on these data