Data Set Information
DATA_SET_NAME ROSETTA-ORBITER CHECK ROSINA 2 CR5 V2.0
DATA_SET_ID RO-X-ROSINA-2-CR5-V2.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data set Overview : On March, 2, 2004, the Rosetta spacecraft was launched towards comet 67P/Churyumov Gerasimenko. Since then the ROSNA sensor has been tested and optimized for flight during several commissioning slots. All data so far from DFMS and RTOF concern either the in flight calibration gas or back-ground outgassing from Rosetta.Because of several uploads of new voltage settings the data cannot be compared between the different commissioning slots, neither in intensity nor in mass scale! The data can be used only for engineering purposes. The only data which can be used to evaluate the background pressure of Rosetta are the COPS data. Scientific data from DFMS and RTOF will only be available when Rosetta reaches the first asteroid. The explanation of the generated data of the ROSINA sensors can be found in the OPERATION_LOGBOOK.ASC Version 2.0 of the data set contains significant corrections to data and label parameters from the previous V1.0 version. Some data file names have changed as a result of specific corrections to START_TIME. See the MODIFICATION_HISTORY.ASC file in the documentation for this data set for a list of specific errors corrected. Parameters : DFMS and RTOF data contain neutral gas data as well as ion data. The data are raw, uncalibrated data. COPS contain pressure data of the background pressure and of some thruster firings from the nude gauge. Calibration : COPS data are calibrated. However, the calibration factor has been determined for Nitrogen gas, and may not be appropriate for the outgas-sing of Rosetta. Because the main outgassing component is unknown the correct factor to be used is also unknown. DFMS and RTOF data are uncalibrated and will remain uncalibrated because they have no scientific value. Note on the DFMS data: The user of our level 2 data has to make the conversion from pixel to mass and from ADC counts to ion current himself. In this way he will be aware that the precision is limited and depends on many parameters and he will use the data accordingly. The procedure required to calibrate the DFMS is described in our User manual, Annex D1 (DOCUMENT directory). ROSINA team are currently developing the necessary algorithms, putting emphasis on the quality control for the algorithm. They are defining quality flags for the data which will then tell the user how well the mass scale and the intensity scale have been defined. They are also working to produce level 3 data with calibrated mass scale and intensity. Once this SW is in place they will produce calibrated data for the Steins flyby with a suitable quality flag. It does not make sense and it is scientifically not correct if ROSINA team archive the Steins flyby data with 'calibrated' units without being sure that they are correct and without being able to give a uncertainty value. Processing : No processing was applied to the data. Coordinate Systems : 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 PLANETOCENTRIC coordinate system. These parameters are computed at time t:START_TIME. Distances are given in km, angles in degrees. Software : No software is provided. Media/Format : The standard distribution format for the data is an electronic volume.
DATA_SET_RELEASE_DATE 2010-05-17T00:00:00.000Z
START_TIME 2009-12-14T12:00:00.000Z
STOP_TIME 2010-05-16T11:59:59.000Z
MISSION_NAME INTERNATIONAL ROSETTA MISSION
MISSION_START_DATE 1995-03-01T12:00:00.000Z
MISSION_STOP_DATE N/A (ongoing)
TARGET_NAME 21 LUTETIA
2867 STEINS
67P/CHURYUMOV-GERASIMENKO 1 (1969 R1)
EARTH
UNKNOWN
TARGET_TYPE ASTEROID
COMET
PLANET
UNKNOWN
INSTRUMENT_HOST_ID RO
INSTRUMENT_NAME ROSETTA ORBITER SPECTROMETER FOR ION AND NEUTRAL ANALYSIS
INSTRUMENT_ID ROSINA
INSTRUMENT_TYPE MASS SPECTROMETER
NODE_NAME Small Bodies
ARCHIVE_STATUS PRE_PEER_REVIEW
CONFIDENCE_LEVEL_NOTE Confidence Level Overview : N/A
CITATION_DESCRIPTION Altwegg, K., ROSETTA-ORBITER CHECK ROSINA 2 ENGINEERING V1.0, RO-X-ROSINA-2-CR5-V2.0, ESA Planetary Science Archive, 2010
ABSTRACT_TEXT This data set present engineering data of the COPS, DFMS and RTOF ROSINA sensors during the active checkout 12, the Lander panel test and Lutetia rehearsal test - Cruise 5 phase. Version 2.0 contains significant corrections to the V1.0 data set.
PRODUCER_FULL_NAME KATHRIN ALTWEGG
SEARCH/ACCESS DATA
  • SBN Comet Website
    		•