Data Set Information
DATA_SET_NAME MSL MARS ROVER ENV MONITORING STATION 6 ADR V1.0
DATA_SET_ID MSL-M-REMS-6-ADR-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : The REMS instrument is a meteorological suite of sensors designed to provide measurements of air and ground temperatures, wind speed and direction, pressure, humidity and ultraviolet radiation. The REMS ADR data set contains ancillary data used in the processing of REMS data. These data may come from sources external to REMS (as is the case of the rover positions), or derived from them (the UV dust attenuation is estimated from images of the rover cameras). They are bundled together and with the rest of the REMS data to make it easier its interpretation and its processing. Data is a time ordered sequence of rows organized into several tables. Each data product contains one sol worth of activity. Parameters : This data set includes the following information: - Geometry information: solar longitude angle, solar zenithal angle, rover position, rover velocity, rover pitch, rover yaw, rover roll, masthead location and arm status. These data are provided by NAIF in SPICE kernels. - Corrections information: estimated Ultraviolet Sensor signal attenuation due to dust deposition. Processing : Processing starts with the generation of the REMS EDRs. The REMS EDR data products are generated by the MIPL (Multimission Image Processing Laboratory) at JPL, under the OPGS, using the telemetry processing software called MSLEdrGen. This software will convert the binary data received from telemetry to ASCII. EDRs will then be retrieved at Centro de Astrobiologia (INTA-CSIC) using the File Exchange Interface (FEI). EDR data products have a first automatic process using calibration data. The result of this is the TELRDR data set, which contains electrical magnitudes and thermal data. In parallel, using ancillary data provided by JPL (such as rover location, sun position) the ADRs (Ancillary Data Records) are generated. EDRs, TELRDRs, ADRs, and calibration data are processed together to obtain the ENVRDRs. The level of processing of the ENVRDRs includes environmental magnitudes with minimal corrections (mainly based on the degradation of the sensors). Finally, applying models developed by the REMS team and refining them with the confidence levels, the MODRDR data set is created. Some of the ADR data, such as the rover and sun geometry, are provided directly by NAIF using SPICE. They are converted to ASCII tables following the conventions used in the rest of REMS data products. Other ADR data, such as the Ultraviolet Sensor attenuation estimation, implies some processing.Dust attenuation magnitude over the Ultraviolet Sensor is estimated from rover cameras images taken at several moments during the mission. The cameras will take images of a target of the same size of the photodiodes situated near them. With a robust image processing algorithm it will be possible to estimate this attenuation factor. Data : Each REMS ADR product in the data set is concatenation of ASCII tables. Each table contains similar ancillary data. There are two tables: one for geometry information and another one for corrections. Each one contains the information outlined in the Parameters section above. Columns are delimited by commas and are of fixed length. Rows are time ordered and are separated by a carriage return/line feed. Each table contains a sol of measurements. Coordinate System : This data set depends on several coordinate systems used in the MSL project. These are: - MSL_TOPO frame, fixed to landing site, is used to define rover position. - MSL_LOCAL_LEVEL, fixed to the rover, is used to define rover orientation (roll, pitch and yaw angles) - MSL_RSM_ZERO_AZ frame, fixed to the rover, is used to define rover remote sensor mast (RSM) azimuth. - MSL_RSM_ZERO_EL, fixed to the rover, is used to define rover remote sensor mast (RSM) elevation. - MSL_ROVER_MECH, fixed to the rover, is used to define Sun position angles (azimuth and elevation) Software : No software is provided in this data set. The RDR tables are simple ASCII files that can be displayed on UNIX, Macintosh, and PC platforms with common software.
DATA_SET_RELEASE_DATE 2019-12-05T00:00:00.000Z
START_TIME 2012-08-07T04:04:38.536Z
STOP_TIME 2019-07-31T07:11:24.136Z
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 ROVER ENVIRONMENTAL MONITORING STATION
INSTRUMENT_ID REMS
INSTRUMENT_TYPE ENVIRONMENTAL STATION
NODE_NAME Planetary Atmospheres
ARCHIVE_STATUS LOCALLY ARCHIVED - ACCUMULATING
CONFIDENCE_LEVEL_NOTE Confidence Level Overview : In this data set, confidence depends on the reliability of the data coming from the external sources. In the case of geometry, data are SPICE kernels provided by NAIF. They are expected to be released as a separate data set. In the case of dust corrections, they are dependent on the quality of the rover cameras images and on the algorithm developed at CAB. Data Coverage and Quality : At the time of this release, due to the low number of images of the Ultraviolet Sensor from sols 1 to sol 154, and the ongoing work of the signal attenuation estimation algorithm, the UV_DUST_ATTENUATION column is set to 1 (no attenuation) as a current best estimate. This factor may be updated as soon as there is more information available. However, analysis of available data has revealed that the accumulation of dust over the Ultraviolet Sensor after sol 155 causes it to be attenuated above 10%, which is beyond the sensor operational requirements. When that happens, the UV_DUST_ATTENUATION column is set to NULL. Limitations : The major limitation of this data set is its dependency on external sources.
CITATION_DESCRIPTION Gomez-Elvira, J., Mars Science Laboratory Rover Environmental Monitoring Station RDR Data V1.0, MSL-M-REMS-6-ADR-V1.0, NASA Planetary Data System, 2013.
ABSTRACT_TEXT Ancillary data used in the processing of the data taken by the sensors of the Rover Environmental Monitoring Station (REMS) aboard the Mars Science Laboratory.
PRODUCER_FULL_NAME JAVIER GOMEZ-ELVIRA
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