Data Set Information
DATA_SET_NAME BRRISON GROUND CALIBRATION - BIRC RAW DATA V1.0
DATA_SET_ID BRRISON-CAL-BIRC-2-GROUND-CAL-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview:This dataset includes the Experimental Data Record (EDR) version of allavailable images acquired by the BIRC starting from the second altitudechamber test (ground calibration) through BRRISON flight until thetermination of flight activities of the BIRC. The images in this datasethave not been processed in any way other than by decompressing, extractingheader information, and generating and attaching PDS labels. This datasetalso includes ancillary data files such as telescope pointing andhousekeeping information.Images:The BIRC images are split into three categories under the root DATAdirectory. This was done because the BIRC flight software (FSW) wasundergoing modification at different stages between ground calibration andflight.The image files all follow the same naming convention.Image file names follow the structure: YYMMDD_HHMMSS_NNN_F_XXX.FIT YYMMDD_HHMMSS are the two digit year, month, day, hour minute second while NNN is the three digit millisecond. This time corresponds to the timetag assigned to the source file by the BIRC FSW. F is the filter number used XXX is the exposure or image ID. A given observation may consist of several images, each tagged with an incrementing count of image ID, starting with ID:000. Images are taken in pairs, first with a 'bias' image at 3.58msec integration time followed by a 'signal' image at the commanded integration time. Even numbered images (starting at 000) are bias images, odd numbered images are the signal images. One can then do a bias subtraction by subtracting the bias image from the signal image.The three image folders and their descriptions follow:GROUNDCAL - contains the images acquired during ground calibration of the BIRC prior to integration with the gondola. Data are organized in YYYYMMDD folders below which are HH and MM folders, respectively. YYYYMMDD are the four digit year, 2 digit month, 2 digit day of month. HH and MM are the hour and minute. The date and times of the folders correspond to the date and time in the EDR filename.QUICKLOOK - contains the images acquired during multiple hang tests at Fort Sumner whereby the gondola was suspended from an overhead crane while the telescope pointed out of the hanger at various sky targets. The data are organized similarly to GROUNDCAL except for the addition of a final subfolder after MM. The subfolder naming convention is '' where is a designation of the intended target. is a single character denoting whether the image was taken via manual commanding 'C' or as part of an automated operation sequence 'O'. For example, in the path /20130922/10/07/GEMINI1C/, GEMINI1 is the designation of the intended target and C denotes that the images in the subfolder were taken via manual command. Quicklook denotes that the data were downloaded via a 'quicklook' process whereby the image download takes precedence over all other telemetry.SCIENCE - contains images acquired during the last day of the hang test at Fort Sumner and during the BRRISON flight. The data are organized in the same manner as those for quicklook in that the final subfolder denotes the target and whether the images were taken via manual command or automated operation. The SCIENCE designation also indicates that the data were downloaded via a 'science down' process whereby the data were queued as part of normal telemetry downlink.Housekeeping:Housekeeping and engineering data are extracted from the raw data filescreated by the BIRC FSW and converted into EDRs which are contained in theHOUSEKEEPING folder under the root DATA folder. Note that there is nohousekeeping data associated with the GROUNDCAL images since those weretaken prior to the integration of the BIRC with the gondola. Subfolders areorganized by YYYYMMDD followed by HH then '', where YYYYMMDDand HH are the year month day and hour and the final subfolder is asdescribed previously in the image QUICKLOOK and SCIENCE folders.Housekeeping file names follow the structure: YYMMDD_HHMMS_NNN_HK.TAB YYMMDD_HHMMSS are the two digit year, month, day, hour minute second; NNN is the three digit millisecond. This time corresponds to the timetag of the first record in the housekeeping file. HK denotes that this is a Housekeeping EDR.There is also a single EDR at the same level as the YYYYMMDD folders, with afilename of 'BRRISON_PENTHOUSE_TEMP.TAB'. This single EDR contains thepenthouse temperature data reported by the Gondola software. This data isnot passed on to the BIRC FSW and therefore is not contained within theother housekeeping EDRs.Pointing:Pointing and location data are extracted from the raw data files created bythe BIRC FSW and converted into EDRs which are contained in the POINTINGfolder under the root DATA folder. Note that there is no pointing dataassociated with the GROUNDCAL images since those were taken prior to theintegration of the BIRC with the gondola. Subfolders have the sameorganization as described for the Housekeeping EDRs.Pointing file names follow the structure: YYMMDD_HHMMS_NNN_P.TAB YYMMDD_HHMMSS are the two digit year, month, day, hour minute second while NNN is the three digit millisecond. This time corresponds to the timetag of the first record in the housekeeping file. P denotes that this is a Pointing EDR.
DATA_SET_RELEASE_DATE 2014-05-29T00:00:00.000Z
START_TIME 2013-08-22T09:08:20.792Z
STOP_TIME 2013-09-29T08:29:32.000Z
MISSION_NAME BRRISON
MISSION_START_DATE 2013-09-28T12:00:00.000Z
MISSION_STOP_DATE 2013-09-29T12:00:00.000Z
TARGET_NAME C/ISON (2012 S1)
MOON
JUPITER
URANUS
CALIBRATION
MARS
TARGET_TYPE COMET
SATELLITE
PLANET
CALIBRATION
INSTRUMENT_HOST_ID BGONDOLA
INSTRUMENT_NAME BRRISON INFRARED CAMERA
INSTRUMENT_ID BIRC
INSTRUMENT_TYPE IMAGING CAMERA
NODE_NAME Small Bodies
ARCHIVE_STATUS SAFED
CONFIDENCE_LEVEL_NOTE Unknown. This data has not undergone an external review.
CITATION_DESCRIPTION CHENG, A. and R. ESPIRITU, BRRISON GROUND CALIBRATION - BIRC RAW DATA V1.0, BRRISON-CAL-BIRC-2-GROUND-CAL-V1.0, NASA Planetary Data System, 2014.
ABSTRACT_TEXT This is a saved data archive of the Balloon Rapid Response for Comet ISON(BRRISON) mission. This mission was performed by The Johns Hopkins UniversityApplied Physics Laboratory (APL) to develop and fly a balloon-borne gondolawith a scientific payload for the observation of Comet ISON and otherplanetary objects, during a one-day flight demonstration in September 2013.The mission was flown on the evening of September 28, 2013, just 11 daysafter the originally targeted launch date of September 17. Ascent to floataltitude lasted about 2 hours. During the very early phase of commissioning,an anomaly occurred that caused the telescope to rapidly retract to thestowed orientation and become stuck in that orientation. Efforts were madeto free the telescope to no avail. The anomaly and its cause will not bediscussed in this archive. Instead, a full description of the anomaly, itscause, and recommended corrective actions is provided in the 'BRRISONAnomaly Investigation Team Final Report.'
PRODUCER_FULL_NAME RAYMOND ESPIRITU
SEARCH/ACCESS DATA
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