Data Set Information
DATA_SET_NAME MSL MARS DYNAMIC ALBEDO OF NEUTRONS 2 EDR V1.0
DATA_SET_ID MSL-M-DAN-2-EDR-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : The Dynamic Albedo of Neutrons (DAN) is an active/passive neutron spectrometer that measures the abundance and depth distribution of H- and OH-bearing materials (e.g., adsorbed water, hydrated minerals) in a shallow layer (~1 m) of Mars' subsurface along the path of the MSL rover. In active mode, DAN measures the time decay curve (the 'dynamic albedo') of the neutron flux from the subsurface induced by its pulsing 14 MeV neutron source (Figure 1 shows an example). A detailed description of the DAN instrument and scientific investigation can be found in Litvak et al. (2008). The MSL DYNAMIC ALBEDO OF NEUTRON DETECTOR consists of 3 EDR data sets. Each is a time series collection of science and housekeeping data from the MSL rover. Data are sorted by type and by time. Data are sorted by time, with each data file containing one day's worth of data from midnight to midnight UTC. Measurements are assigned to a particular day based on the end of the collection interval. Parameters : The DAN EDR data set is composed of three data types. The objective of compiling the DAN EDR is to create a record of the primary data collected by DAN. The following paragraphs discuss the parameters of interest in each of the data types. Standby ------- The DAN standby data set is produced when the instrument low voltage is on with not science observations. Passive ------------ The PASSIVE data set is produced with high voltage applied to the detectors but the PNG is not pulsing. Active ------------ The ACTIVE data is is produced with high voltage applied to the detectors and the PNG is pulsing. Processing : DAN's Experiment Data Records (EDR), NASA Level 0 products are generated from the reconstructed data products, which are produced by the Multi-Mission Data Processing and Control System (MPCS) on MSL. MPCS is a component of Real Time Operations (RTO), which itself is part of the MSL Ground Data System (GDS). Data : The DAN EDR data product contains three types of data. DAN_STANDBY DAN housekeeping data DAN_PASSIVE DAN housekeeping and passive neutron data DAN_ACTIVE DAN housekeeping and active neutron data All three types are time series of DAN housekeeping and science data. Coordinate System : Not applicable for this data set. Software : No DAN specific software is provided with this data set. PDS-labeled images and tables can be viewed with the program NASAView, developed by the PDS and available for a variety of computer platforms from the PDS web site http://pds.nasa.gov/tools/software_download.cfm. There is no charge for NASAView. Media/Format : The DAN EDR will be delivered using DVD media. Formats will be based on standards for such products established by the Planetary Data System (PDS) [PDSSR2009].
DATA_SET_RELEASE_DATE 2012-03-15T00:00:00.000Z
START_TIME 2012-07-16T12:00:00.000Z
STOP_TIME N/A (ongoing)
MISSION_NAME MARS SCIENCE LABORATORY
MISSION_START_DATE 2003-10-01T12:00:00.000Z
MISSION_STOP_DATE N/A (ongoing)
TARGET_NAME MARS
TARGET_TYPE PLANET
INSTRUMENT_HOST_ID MSL
INSTRUMENT_NAME DYNAMIC ALBEDO OF NEUTRONS
INSTRUMENT_ID DAN
INSTRUMENT_TYPE CALORIMETER/SPECTROMETER
NODE_NAME Geosciences
ARCHIVE_STATUS LOCALLY_ARCHIVED_ACCUMULATING
CONFIDENCE_LEVEL_NOTE Confidence Level Overview : The data presented in the DAN EDR is intended to be the least processed, most primitive data set released for DAN. Data presented here are an accurate representation of DAN data as received from the rover. Review : The DAN EDR was reviewed internally by the DAN team prior to release to the PDS. PDS will also performed an external peer review of the DAN EDR. Data Coverage and Quality : Data reported are the minimally processed data received from the orbiter during nominal DAN operations. All data received is reformatted into one of the EDR data types. Data are by definition of good quality, as damaged telemetry packets are sequestered upon receipt from the spacecraft. We do not expect to receive many (if any) damaged data packets. Limitations : The major limitation of this data set is that this is level 0, minimally processed data. The data are received from the spacecraft telemetry and ingested into a database. If gaps exist in the telemetry, data are lost. Data Compression : No data compression is used.
CITATION_DESCRIPTION Mitrofanov, I., 2012 Mars Science Laboratory Dynamic Albedo of Neutrons EDR Data V1.0, MSL-L-DAN-2-EDR-V1.0, NASA Planetary Data System, 2012.
ABSTRACT_TEXT Raw, uncalibrated housekeeping and scientific data collected from the Dynamic Albedo of Neutron Detector (DAN) aboard the Mars Science Laboratory.
PRODUCER_FULL_NAME IGOR MITROFANOV
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