NSSDCA ID: PSSB-00495
Availability: Archived at NSSDC, accessible from elsewhere
This description was generated automatically using input from the Planetary Data System.
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 Cruise 4A mission phase. All data were obtained as part of the Active Checkout PC8 which occurred during this mission phase. A detailed listing of all Alice observations is given in the observation log file located in the DOCUMENT directory. The following operations took place during the period covered by this data set: # Payload Checkout #8 (PC8) # 2008 July 5-27 # Alice activity overview: # * 2008 Jul 05 01:15 - AL01 (passive checkout; 2 hr) # * 2008 Jul 05 03:20 - AL02 (decontamination; 25 hr, 22hr heater + 3hr cooldown) # * 2008 Jul 06 04:30 - AL09A (Service 19 test with GIADA; 1.5 hr) # * 2008 Jul 11 16:55 - AL05 (Blank Sky field #2; 24 hr) # * 2008 Jul 12 18:10 - AL06A, AL03A, AL08A (Vega cal; 3 hr) # * 2008 Jul 12 22:20 - AL06B, AL03B, AL08B (alp Gru cal; 3 hr) # * 2008 Jul 13 03:00 - AL06E, AL03E, AL08E (HD 93521 cal; 12 hr) # * 2008 Jul 13 19:35 - AL07 (dark calibration; 3 hr) # * 2008 Jul 19 15:30 - AL_ICE, AL_ICS (interference campaign; infrequently over a period of ~8.5 hr) # * 2008 Jul 20 22:30 - AL99A (flight software patch, v2.06; ~50 min) # * 2008 Jul 26 10:05 - AL99B (validation test of flight software patch, v2.06; 2 hr) # * 2008 Jul 26 14:05 - AL09A (Service 19 test with ROSINA; 1.5 hr) # * 2008 Jul 26 15:40 - AL02 (decontamination; 25 hr, 22hr heater + 3hr 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. 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.
These data are available on-line from the Planetary Data System (PDS) at:
http://pdssbn.astro.umd.edu/holdings/ro-cal-alice-3-cr4a-v1.0/
Questions and comments about this data collection can be directed to: Dr. David R. Williams
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Alan Stern | Data Provider | NASA Headquarters | alan.stern@nasa.gov |
Dr. Andrew J. Steffl | General Contact | Southwest Research Institute | steffl@boulder.swri.edu |