Data Set Information
DATA_SET_NAME ROSETTA-ORBITER LUTETIA/CAL ALICE 3 AST2 V1.0
DATA_SET_ID RO-A/CAL-ALICE-3-AST2-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 Lutetia flyby mission phase, which took place between 2010-06-07 and 2010-09-10. A detailed listing of all Alice observations is given in the observation log file located in the DOCUMENT directory. The following Alice observations were made during the period covered by this data set: # Flyby of asteroid (21) Lutetia# 2010 July 5-13# Alice activity overview:# * 2010-Jul-05 12:50:00 - AL02 (decontamination; 23 hr, 22 hr heater + 1 hr cooldown)# * 2010-Jul-06 14:00:00 - AL07 (dark calibration; 1 hr)# * 2010-Jul-06 15:00:00 - AL06B, AL03B, AL08B (stellar cal [zet Cas]; 1 hr each boresight)# * 2010-Jul-08 14:30:00 - AL21A (exosphere search, +26 deg roll; 8 hr 20 min)# * 2010-Jul-09 03:45:00 - AL21B (exosphere search, nominal roll; 5 hr 15 min)# * 2010-Jul-09 09:15:00 - AL21C (exosphere search, -26 deg roll; 9 hr 40 min)# * 2010-Jul-10 06:45:00 - AL21D (exosphere search, nominal roll; 4 hr 40 min)# * 2010-Jul-10 11:00:00 - AL07 (dark calibration; 1 hr)# * 2010-Jul-10 11:00:00 - Breakpoint 2# * 2010-Jul-10 12:16:03 - AL31 (closest approach obs; 3 hr 49 min)# * 2010-Jul-10 12:44:53 - Asteroid Flyby Mode# * 2010-Jul-10 15:26:41 - Zero Phase# * 2010-Jul-10 15:44:55.5 - Closest Approach (3160 km)# * 2010-Jul-10 18:30:00 - AL09 (boresight alignment, raster scan [lam Aql]; 1 hr 45 min)# * 2010-Jul-11 04:45:00 - AL32 (closest approach bkg; 6 hr)# * 2010-Jul-11 10:45:00 - AL07 (dark calibration; 1 hr)# * 2010-Jul-11 12:45:00 - AL22A,B,C (exosphere bkg; 7.5 hr, 2.5 hr at each roll angle: 0,+/-26 deg)# * 2010-Jul-11 22:45:00 - AL06A, AL03A, AL08A (stellar cal [Vega]; 1 hr each boresight)# * 2010-Jul-12 03:15:00 - AL02 (decontamination; 23 hr, 22 hr heater + 1 hr cooldown) 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. 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 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 2010-12-17T00:00:00.000Z
START_TIME 2010-07-05T12:46:07.719Z
STOP_TIME 2010-07-12T12:51:03.473Z
MISSION_NAME INTERNATIONAL ROSETTA MISSION
MISSION_START_DATE 1995-03-01T12:00:00.000Z
MISSION_STOP_DATE N/A (ongoing)
TARGET_NAME 21 LUTETIA
CALIBRATION
TARGET_TYPE ASTEROID
CALIBRATION
INSTRUMENT_HOST_ID RO
INSTRUMENT_NAME ALICE
INSTRUMENT_ID ALICE
INSTRUMENT_TYPE ULTRAVIOLET SPECTROMETER
NODE_NAME Small Bodies
ARCHIVE_STATUS IN_LIEN_RESOLUTION
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. Review : Data Coverage and Quality : Data quality is good unless otherwise noted by the DATA_QUALITY keyword. Limitations : Although these data have been calibrated and are in physical units, the wavelength scale is unique to each individial file. Thus, care must be taken when comparing one data file to another. The Alice team recommends using the reformatted, calibrated CODMAC level 4 data products, which solves this problem.
CITATION_DESCRIPTION Stern, S. A., et al., ROSETTA-ORBITER LUTETIA/CAL ALICE 3 AST2 V1.0 RO-A/CAL-ALICE-3-AST2-V1.0, NASA Planetary Data System, 2010.
ABSTRACT_TEXT This data set contains CODMAC level 3 data acquired by the Rosetta Orbiter ALICE UV Spectrometer during the Lutetia flyby mission phase, which took place between 2010-06-07 and 2010-09-10.
PRODUCER_FULL_NAME ANDREW J. STEFFL
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