PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "2012-05-03 GEO:shs Initial version; 2020-09-18 GEO:arw Revised;" RECORD_TYPE = STREAM OBJECT = DATA_SET DATA_SET_ID = "MSL-M-SAM-5-RDR-L2-V1.0" OBJECT = DATA_SET_INFORMATION DATA_SET_NAME = "MSL MARS SAMPLE ANALYSIS AT MARS 5 RDR LEVEL 2 V1.0" DATA_SET_COLLECTION_MEMBER_FLG = "N" DATA_OBJECT_TYPE = {"SPREADSHEET","TEXT"} START_TIME = 2012-09-03T07:16:55 STOP_TIME = UNK DATA_SET_RELEASE_DATE = 2013-02-27 PRODUCER_FULL_NAME = "PAUL MAHAFFY" DETAILED_CATALOG_FLAG = "N" DATA_SET_TERSE_DESC = "The MSL SAM Level 2 data set contains results of data interpretation completed by the SAM science team, e.g. gas composition, isotope ratios, species, relative abundance." ABSTRACT_DESC = "This archive contains Reduced Data Record (RDR) instrument data acquired by the Sample Analysis at Mars (SAM) instrument suite on the Mars Science Laboratory rover. SAM includes the Quadrupole Mass Spectrometer (QMS), the Gas Chromatograph (GC), and the Tunable Laser Spectrometer (TLS)." CITATION_DESC = "Mahaffy, P., MSL SAM Level 2 Data, MSL-M-SAM-5-RDR-L2-V1.0, NASA Planetary Data System, 2013." DATA_SET_DESC = " Data Set Overview ================= The Sample Analysis at Mars (SAM) suite in the MSL Analytical Laboratory is designed to address the present and past habilitability of Mars by exploring molecular and elemental chemistry relevant to life. SAM addresses carbon chemistry through a search for organic compounds, the chemical state of light elements other than carbon, and isotopic tracers of planetary change. SAM is a suite of three instruments: a Quadrupole Mass Spectrometer (QMS), a Gas Chromatograph (GC), and a Tunable Laser Spectrometer (TLS). The QMS and the GC can operate tpgether in a GCMS mode for separation (GC) and definitive identification (QMS) or organic compounds. The mass range of the QMS is 2-535 Da. The TLS obtains precise isotope ratios for C and O in carbon dioxide and H and O in water. It also measures trace levels of methane and its carbon isotope ratio. The three SAM instruments are supported by a sample manipulation system (SMS) and a Chemical Separation and Processing Laboratory (CSPL) that includes high conductance and micro valves, gas manifolds with heaters and temperature monitors, chemical and mechanical pumps, carrier gas reservoirs and regulators, pressure monitors, pyrolysis ovens, and chemical scrubbers and getters. The Mars atmosphere is sampled by CSPL valve and pump manipulations that introduce an appropriate amount of gas through an inlet tube to the SAM instruments. The solid phase materials are sampled by transporting finely- sieved materials to one of 74 SMS sample cups that can then be inserted into a SAM oven and thermally processed for release of volatiles. The SAM L2 data set represents the result of science data interpretation by the SAM team. Parameters ========== The SAM L2 data set represents results of data interpretation by the SAM science team. It may include the following types of data, depending on the experiment sequence: QMS GC TLS Processing ========== Raw data is delivered to the SAM team as Experiment Data Record (EDR) products generated by the Multi-mission Image Processing Laboratory (MIPL) at JPL under the Operations Products Generation Subsystem (POGS), using the telemetry processing software MSLEdrGen. Products are created by MIPL during operations from: a) MPCS data products, b) SPICE kernels, and c) a meta-data database. They are created on the MSL Operations Data Store (ODS) and then deposited intoMIPL's File Exchange Interface (FEI) for electronic distribution to remote sites/ users via a secure subscription protocol. The EDR product is considered NASA packet-level data. SAM EDR data products are stored at the PDS for safekeeping but are not formally archived in PDS. The SAM team converts raw data to a more manageable format, which is stored at PDS as NASA level 0 data. Higher level RDR products represent the results of further data manipulation and interpretation.Details of processing for L2 are discussed below. Data ==== The SAM L2 data set is a collection of files containing the results of data interpretation by the SAM science team. The following types of data may be included, depending on the experiment sequence: QMS DATA -------- QMS L2 data may include gas composition and isotope ratios, and gas composition with peak sample temperature for EGA runs. GC DATA ------- GC L2 data may include species identified and their relative abundances, for pyrolysis products and derivatized compounds. TLS DATA -------- TLS L2 data include abundance and isotope ratios. Ancillary Data ============== No ancillary data are provided. Coordinate System ================= Several coordinate systems are used by the MSL project. A detailed description can be found in the SAM RDR SIS document found in the Documents directory. Software ======== No SAM specific software is provided with this data set. All products are ASCII text, viewable in any text editor. TABLE and SPREADSHEET products are also suitable for use in spreadsheet and database management programs. " CONFIDENCE_LEVEL_NOTE = " Confidence Level Overview ========================= SAM L2 data represent results of interpretation of science data by the SAM team. Accuracy of the data presented here is dependent on appropriate use of pre-flight calibration data for preliminary corrections. Review ====== The SAM RDR was reviewed internally by the SAM team prior to release to the PDS. PDS also performed an external peer review of the SAM RDR. Data Coverage and Quality ========================= Data reported are the processed data received from the rover during nominal SAM operations. This product contains all data received from the rover for a single SAM experiment sequence. If gaps exist in the telemetry from the rover, data are lost. Limitations =========== The L2 data set is limited by any errors in the L1C data set. " END_OBJECT = DATA_SET_INFORMATION OBJECT = DATA_SET_MISSION MISSION_NAME = "MARS SCIENCE LABORATORY" END_OBJECT = DATA_SET_MISSION OBJECT = DATA_SET_TARGET TARGET_NAME = "MARS" END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_HOST INSTRUMENT_HOST_ID = "MSL" INSTRUMENT_ID = "SAM" END_OBJECT = DATA_SET_HOST OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = "MAHAFFYETAL2012" END_OBJECT = DATA_SET_REFERENCE_INFORMATION END_OBJECT = DATA_SET END