Data Set Overview : The Thermal Evolved Gas Analyzer (TEGA) is designed to analyze ~50 mg of fine grained Martian soil or rock fragments. TEGA consists of four basic components: a soil delivery system, an oven/calorimeter thermal analyzer (TA), a gas storage and handling system, and a mass spectrometer acting as an evolved-gas analyzer (EGA). A full description of the TEGA instrument can be found in [BOYNTONETAL2008].  The data set PHX MARS THERMAL EVOLVED GAS ANALYZER 1 EDR is a time series collection of TA, EGA, engineering, and commanding measurements from the TEGA aboard the Mars Phoenix Lander. Data types included in this data set are engineering data, calorimeter data from the TA,sweep mode EGA data, mass hopping mode EGA data, LED oven fill data, and instrument message log data. Data are sorted by time, with each data file containing one measurement day's worth of data from midnight to midnight UTC.  TEGA is designed to analyze 8 individual samples, one sample in each of the eight single use ovens. The EGA portion of the instrument will not only analyze the gases evolved from the samples heated in the ovens, but will also analyzed samples of the Martian atmosphere. TEGA is expected to operate for 45 days. During operations the science, engineering and housekeeping data are downloaded from the spacecraft by the Jet Propulsion Laboratory (JPL) into the Telemetry Data System(TDS). The TDS sends data to a process that translates data packets and examines instrument health via messages. Data are output to a spooler that passes them to the University of Arizona (UA) database ingest process. The ingest process inputs raw data into the UA database. Data are retrieved from the UA database to build the TEGA EDR data products.  The TEGA EDR data set is intended to be the lowest level (level 0) data available for TEGA. It should be useful to those scientists who are experienced in calorimetry and mass spectrometry.   Parameters : The TEGA EDR data set is composed of three main data types and three supporting data types. The objective of compiling the TEGA EDR is to create a record of the primary data collected by TEGA. The following paragraphs discuss the parameters of interest in each of the data types.  SC DATA ----- The SC data are time series records taken over the course of a measurement day. Data files are labeled with the date. Individual records are a single data collection interval. SC data are the science data produced by the TA.  EGA DATA -------- The EGA data are time series records taken over the course of a measurement day. Data files are labeled with the date. Individual records are a single data collection interval. EGA data are the science data produced by the EGA mass spectrometer in sweep mode.  EGH DATA -------- The EGH data are time series records taken over the course of a measurement day. Data files are labeled with the date. Individual records are a single data collection interval. EGH data are the science data produced by the EGA mass spectrometer in mass hopping mode.  The Engineering, LED fill and Message Log, data sets provide supporting information.  Engineering Data ---------------- The Engineering data are time series records for each engineering parameter taken over the course of a measurement day. Data files are grouped in the ENG folder and are labeled with the engineering parameter name. Individual records are a single data collection interval that is variable in duration. Engineering values are reported by parameter name and include collection time, and DN value. Engineering values are specific monitor values recorded by TEGA.  Message Log ----------- The Message Log data are time series records taken over the course of a day. Data files are labeled with the date. Individual records are a single data collection interval. The Message Log data are messages returned from TEGA.  LED --- LED data are time series records taken over the course of a measurement day. Data files are labeled with the date. Individual records are a single data collection interval, which is variable in duration. The LED data are the data collected by the oven fill sensors, and indicate when an oven is full of sample material.   Processing : TEGA data (both science and engineering) are downloaded from the Phoenix Mars Lander by JPL into the Telemetry Data System (TDS). The TDS sends the data to a process called TEGA_tl, that translates GRS packets from any source to any destination and examines instrument health via messages. The data are checked for packet types, header information, messages, or errors. Data are output to a spooler, which passes data to the UA database ingestion process. The ingestion process inputs raw telemetry data into the database.  A function reads the data header to get the total number of bytes in the packet, and the sequence bytes. The rest of the packet is then read. The data type, read from the common header, is returned, determining the next step in the processing. One of a number of different procedures is run to insert packet data into the appropriate database tables. If the data type returned is less than or equal to 0 an error message is returned stating that the packet was not inserted. Once all data packets for a measurement day are ingested into the database, the EDR data products are created by reformatting the raw data in accordance with the data formats specified by the product labels.   Data : The TEGA EDR data set is composed of a series of date stamped files that contain 1 day's worth (24 hours, 00:00:00 UTC to 23:59:59 UTC) of data for 6 different data types. The following sections describe each data type.  SC DATA ------- SC data are composed of raw scanning calorimeter data. These data include start and end time of collection, oven and shield power, and associated current, potential, and pulse data.  EGA DATA -------- EGA mass spectrometer data is composed of start and stop times of the collection, scan type, voltage, emission energy and counts at each of four collectors.  EGH DATA -------- EGH data are mass hopping mode EGA data. These data include start and stop times for the collection, voltage, emission energy and level, and counts at the detector.  Engineering Data ---------------- Engineering data are composed of the 85 different engineering readings monitored in TEGA. The engineering readings can be taken at several different time intervals. The following is a list of all the engineering readings and a description of each.  TA_MANIFOLD_PRES Manifold Pressure TA_PLUS_5_VREF +5V REF TA_OUTLET_PRES Outlet Pressure TA_MANIFOLD_TEMP TA Manifold Temperature TA_EGA_PLUMB_TEMP MS Plumbing Temperature TA_EGA_BAKEOUT_TEMP Bakeout temperature TA_PLUMBING_1_TEMP Plumbing 1 Temperature TA_PLUMBING_2_TEMP Plumbing 2 Temperature TA_EGA_MAN_TEMP MS Manifold Temperature TA_CAL_TANK_TEMP Cal Tank Temperature TA_CPU_TEMP CPU Temperature TA_PWR_SPLY_1_TEMP Power Supply 1 Temperature TA_PWR_SPLY_2_TEMP Power Supply 2 Temperature TA_PWR_CNTL_1_TEMP Power Control 1 Temperature TA_PWR_CNTL_2_TEMP Power Control 2 Temperature TA_A2D_TEMP ADC Temperature TA_COVER_1_TEMP cover 1 temperature TA_INPUT_FUNNEL_1_LO_ TEMP Funnel 1 Temperature TA_PRES_SENSE_FD_BK Pres Sense Exc. Feedback TA_INPUT_FUNNEL_2_LO_TEMP Funnel 2 Temperature TA_OVEN_TEMP Oven Temperature TA_SHLD_TEMP Shield Temperature TA_EGA_ELECT_BOX_TEMP TEB Temperature TA_T_HEATER_TEMP 'T' Heater Temperature TA_TRANS_TUBE_TEMP Transfer Tube Temperature TA_EGA_GEC_TEMP GEC Temperature TA_BUS_A_VOLT Bus A Voltage TA_AGD_0_1 AGD_0_3 ground TA_AGD_3_1 AGD_3_1 ground TA_CPU_PLUS_5_VOLT CPU Voltage TA_ANLG_PLUS_12_VOLT Analog +12V Voltage TA_ANLG_MINUS_12_VOLT Analog -12V Voltage TA_OVEN_PLUS_15_VOLT Oven Voltage TA_SHIELD_PLUS_30_VOLT Shield Voltage TA_BUS_A_CUR Bus A Current TA_BUS_B_CUR Bus B Current TA_EGA_CUR EGA Current TA_CPU_PLUS_5_CUR CPU Current TA_ANLG_PLUS_12_CUR Analog +12V Current TA_ANLG_MINUS_12_CUR Analog -12V Current TA_OVEN_PLUS_15_CUR Oven Current TA_SHIELD_PLUS_30_CUR Shield Current TA_FULL_DETECT Full Detect Integrated TA_FULL_DETECT_RAW Full Detect Raw TA_OVEN_ERR Oven Error TA_SHLD_ERR Shield Error TA_CAL_TANK_COLD_TEMP Cal Tank Cold Temperature TA_COVER_2_TEMP cover 2 Temperature MEM_OVEN_INT_LO Oven integrator val lo bytes MEM_OVEN_INT_HI Oven integrator val hi bytes MEM_SHLD_INT_LO Shield integrator val lo bytes MEM_SHLD_INT_HI Shield integrator val hi bytes MEM_OVEN_VOLT Oven voltage MEM_OVEN_CUR Oven current MEM_SHLD_VOLT Shield voltage MEM_SHLD_CUR Shield current MEM_MANIFOLD_PRES Manifold pressure MEM_OVEN_ERR Oven error MEM_SHLD_ERR Shield error MEM_T_WIDTH T pulse width COVER1_DONE Cover1 Limit Switch COVER2_DONE Cover2 Limit Switch MEM_OVEN_WIDTH Oven pulse width MEM_SHLD_WIDTH Shield pulse width EGA_STATUS_BITS Status bits value EGA_TRAP_CUR Trap current monitor EGA_EMISSION_CUR Emission current monitor EGA_FILAMENT_1 Filament 1 in use EGA_FILAMENT_2 Filament 2 in use EGA_PLUS_5_VOLT +5 volt monitor EGA_PLUS_12_VOLT +12 volt monitor EGA_MINUS_12_VOLT -12 volt monitor EGA_FILAMENT_CUR_1 Filament 1 current monitor EGA_FILAMENT_CUR_2 Filament 2 current monitor EGA_MULTIPLIER_VOLT Multiplier voltage monitor EGA_ION_PUMP_VOLT Ion Pump voltage monitor EGA_ION_PUMP_CUR Ion Pump Current monitor EGA_SWEEP_VOLT Sweep voltage monitor EGA_GEC_CUR GEC current monitor EGA_MAGNET_TEMP_1 Magnet 1 temperature EGA_MAGNET_TEMP_2 Magnet 2 temperature EGA_PROC_TEMP CPU temperature EGA_AVG_CALLS Average # calls to Task Queue EGA_MIN_CALLS Minimum # calls to Task Queue EGA_SPARE_3 Spare EGA_SPARE_4 Spare  Message Log ----------- The Message Log data consists of the data sent from the TEGA electronics in response to some action taking place in the instrument. The message data includes general messages and warnings as well as error messages. . LED DATA -------- The LED data consists of the time of the LED reading and the state of the sensor. This data is used to indicate when an oven is full of sample.   Ancillary Data : Ancillary data are listed by data type.  Message Log ----------- A list of all message ID's and their associated meanings can be found in the Message Log label file. A list of message detail ID's and the associated information can be found in the tega_message_dict document located in the document directory.   Coordinate System : Several coordinate systems are used by the Phoenix project. A detailed description can be found in the TEGA EDR SIS document found in the Documents directory.   Software : No TEGA 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 TEGA EDR will be delivered using DVD media. Formats will be based on standards for such products established by the Planetary Data System (PDS) [PDSSR2001].

Confidence Level Overview : The data presented in the TEGA EDR is intended to be the least processed, most primitive data set released for TEGA. Data presented here are an accurate representation of TEGA data as received from the spacecraft.   Review : The TEGA EDR was reviewed internally by the TEGA team prior to release to the PDS. PDS will also performed an external peer review of the TEGA EDR.   Data Coverage and Quality : Data reported are the minimally processed data received from the lander during nominal TEGA 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 lander. 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.