PDS_VERSION_ID = PDS3 OBJECT = DATA_SET DATA_SET_ID = "NEAR-A-GRS-2-EDR-EARTH-V1.0" OBJECT = DATA_SET_INFORMATION DATA_SET_NAME = "NEAR GRS SPECTRA FOR EARTH FLYBY PHASE" DATA_SET_TERSE_DESC = " Level 1b NEAR Gamma Ray Spectrometer observations taken during the Earth flyby phase of the mission. " DATA_SET_COLLECTION_MEMBER_FLG = "N" DATA_OBJECT_TYPE = TABLE START_TIME = 1998-01-23T00:00:02.871 STOP_TIME = 1998-01-26T23:58:36.767 DATA_SET_RELEASE_DATE = 2002-07-04 PRODUCER_FULL_NAME = "DOUGLAS B. HOLLAND" DETAILED_CATALOG_FLAG = "N" DATA_SET_DESC = " Data Set Overview ================= This data set contains Gamma Ray Spectrometer (GRS) observations made during the Earth flyby phase of the NEAR mission. The individual observations are combined into a single file per day for each sensor. Parameters ========== The data are presented as FITS binary tables (using the BINTAB extension) with detached PDS labels. The parameters listed in each table vary with observing sensor. The detailed descriptions of the various parameters included in the table are given in a separate documentation file, one for each sensor: GRBDEFINITIONS.TXT GRFDEFINITIONS.TXT GRSDEFINITIONS.TXT Data ==== The data are in the form of FITS files with attached FITS headers and detached PDS labels. The data subdirectory has subdirectories for each instrument sensor. Files contain all data for one day. Ancillary Data ============== Geometry data (pointing and attitude information) are provided for the entire NEAR mission as a separate data set. Media/Format ============ This data set is released as a CDROM set. Processing History ================== The processing history includes no background, noise, geometry or other corrections." CONFIDENCE_LEVEL_NOTE = " Data Quality Flag ================= Each observation includes a quality flag in the column named 'DQI'. This flag was extracted from the FITS keyword NEAR-008 of the original data label. The fields of this keyword are defined below. Data quality defects flag is raised when there is missing data other fields informational and not quality related. The eight characters of this field are described below. Definition - Data Quality Index c0 = Data Quality Flag (0=good,1=flagged for quality defects) c1 = Instrument number for FC, CTP and AIU (1 or 2) c2 - c6 = Processing Flags not quality related c7 = CCDS Source (0=VC0, 1=VC1, 2=VC2, 3=VC3) Review ====== This data set underwent external peer review within PDS in June, 2000." END_OBJECT = DATA_SET_INFORMATION OBJECT = DATA_SET_TARGET TARGET_NAME = EARTH END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_TARGET TARGET_NAME = MOON END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_HOST INSTRUMENT_HOST_ID = "NEAR" INSTRUMENT_ID = "GRS" END_OBJECT = DATA_SET_HOST OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = "CHENGETAL1998" END_OBJECT = DATA_SET_REFERENCE_INFORMATION END_OBJECT = DATA_SET END