Required Reading : The format of all Alice data are described in detail by the EAICD document located in the /DOCUMENT directory. The Alice team strongly recommends reading this documentation before using the data. Data Set Overview : This data set contains reformatted, calibrated data acquired by the Rosetta Orbiter ALICE UV Spectrometer during the comet escort 1 mission phase, which took place between 2014-11-19 and 2015-03-10. Processing : The data in this data set are CODMAC level 4 data, and, as such, have been calibrated and reformatted. Corrections for detector dead time, dark counts, flatfield, and effective area have generally been applied. The primary FITS header contains a list of which corrections have been applied to that file. See the CALIBRATION_COOKBOOK.PDF in the DOCUMENT directory for more information. Data : The data are in FITS format and text format. Each FITS file has a detached PDS label so that they can be read either by FITS or PDS tools. A detailed description of the data format is given in the ALICE 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 and Equinox reference frame of J2000. SUB_SPACECRAFT_LATITUDE, SUB_SPACECRAFT_LONGITUDE are given in the Cheops reference frame. These parameters are computed at time t:START_TIME. Distances are given in km, angles in degrees. The 67P/C-G_CK comet frame is defined by the kernel file, ROS_CHURYUMOV_V01.TF. Software : All FITS readers should be able to successfully read the data.

Confidence Level Overview : Data confidence is nominal, meaning that all data have been validated by the Alice team and found as expected. Any exceptions are noted by the DATA_QUALITY field in the label files. Review : Data Coverage and Quality : Data quality is good unless otherwise noted by the DATA_QUALITY keyword. Limitations :