Data Set Information
DATA_SET_NAME ROSETTA-ORBITER CAL/EARTH ALICE 3 EAR2 V1.0
DATA_SET_ID RO-CAL/E-ALICE-3-EAR2-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Required Reading : The format of all Alice data are described in detail by the EAICD document located in the /DOCUMENT directory. In addition, the Rosetta Alice logbook file, RA_LOGBOOK_NNN.ASC, also located in the DOCUMENT directory provides observational details such as observation target, commanded exposure time, etc., for all Alice data. The Alice team strongly recommends reading this documentation before using the data. Data Set Overview : This data set contains calibrated data acquired by the Rosetta Orbiter ALICE UV Spectrometer during the second earth swing-by phase of the Rosetta mission, which occurred September 13, 2007 to December 13, 2007. Observations of calibration targets, the earth and the moon were made during this mission phase. A detailed listing of all Alice observations is given in the observation log file located in the DOCUMENT directory. Processing : The data in this data set are calibrated, CODMAC Level 3 data. As such, 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. There are some significant discrepancies in the absolute calibration that will be corrected in a subsequent data delivery when the calibration is better understood. 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 frame of J2000. SUB_SPACECRAFT_LATITUDE, SUB_SPACECRAFT_LONGITUDE are given in the PLANETOGRAPHIC coordinate system. These parameters are computed at time t:START_TIME. Distances are given in km, angles in degrees. Software : All FITS readers should be able to successfully read the data.
DATA_SET_RELEASE_DATE 2008-06-15T00:00:00.000Z
START_TIME 2007-09-13T05:00:01.549Z
STOP_TIME 2007-11-16T12:59:51.836Z
MISSION_NAME INTERNATIONAL ROSETTA MISSION
MISSION_START_DATE 1995-03-01T12:00:00.000Z
MISSION_STOP_DATE N/A (ongoing)
TARGET_NAME CALIBRATION
EARTH
MOON
TARGET_TYPE CALIBRATION
PLANET
SATELLITE
INSTRUMENT_HOST_ID RO
INSTRUMENT_NAME ALICE
INSTRUMENT_ID ALICE
INSTRUMENT_TYPE ULTRAVIOLET SPECTROMETER
NODE_NAME Small Bodies
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE 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. There are some significant discrepancies in the absolute calibration that will be corrected in a subsequent data delivery when the calibration is better understood. Data Coverage and Quality : Data quality is good unless otherwise noted by the DATA_QUALITY keyword. Limitations : These data have been calibrated and are in physical units
CITATION_DESCRIPTION Stern, S.A., et al., ROSETTA-ORBITER CAL/EARTH ALICE 3 EAR2 V1.0 RO-CAL/E-ALICE-3-EAR2-V1.0, NASA Planetary Data System, 2008.
ABSTRACT_TEXT This data set contains CODMAC level 3 data acquired by the Rosetta Orbiter ALICE UV Spectrometer during the second earth swing-by phase of the Rosetta mission, which occurred 2007-09-13 to 2007-12-13. In addition to the second swingby of the earth, this period includes the active payload checkout #6 (PC6). The observations made during the period covered by this data set are primarily designed to improve the calibration of the Alice instrument.
PRODUCER_FULL_NAME ANDREW J. STEFFL
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