PDS_VERSION_ID                   = PDS3
LABEL_REVISION_NOTE              = "2008-11-11, L.F. Huber;
                                    2008-12-10  GEO:Arvidson;
                                    2009-02-16, L.F. Huber;
                                    2009-04-15, L.F. Huber;
                                    2009-04-21, L.F. Huber"
RECORD_TYPE                      = STREAM

OBJECT                           = DATA_SET
  DATA_SET_ID                    = "PHX-M-TT-5-WIND-VEL-DIR-V1.0"

  OBJECT                         = DATA_SET_INFORMATION
  DATA_SET_NAME                  = "PHOENIX MARS TELLTALE WIND VELOCITY & 
                                    DIRECTION V1.0"
  DATA_SET_COLLECTION_MEMBER_FLG = "N"
  DATA_OBJECT_TYPE               = TABLE
  ARCHIVE_STATUS                 = "IN QUEUE"
  START_TIME                     = 2008-05-25
  STOP_TIME                      = 2008-10-27
  DATA_SET_RELEASE_DATE          = 2009-04-29
  PRODUCER_FULL_NAME             = {"CHRISTINA HOLSTEIN-RATHLOU", 
                                    "HARALDUR GUNNLAUGSSON"}
  DETAILED_CATALOG_FLAG          = "N"
  
  DATA_SET_TERSE_DESC            = "Phoenix Lander Telltale Wind Velocity &  
                                    Direction Data Records, Version 1.0"

  CITATION_DESC                  = "Holstein-Rathlou, C., and H. Gunnlaugsson,
    Phoenix Mars Lander Telltale Wind Velocity and Direction Data, NASA 
    Planetary Data System, PHX-M-TT-5-WIND-VEL-DIR-V1.0, 2008."

  ABSTRACT_DESC                  = "The Phoenix Telltale data set consists of
    a time-ordered table of wind velocity and direction measurements obtained
    by analysis of SSI images of the Telltale anemometer."

  DATA_SET_DESC                  = "
      Data Set Overview 
      =================  

      The Telltale wind indicator is a mechanical anemometer designed to 
      operate on the Martian surface as part of the meteorological 
      package on the NASA Phoenix lander. It consists of a lightweight 
      cylinder suspended by Kevlar fibers and is deflected under the 
      action of wind. Imaging of the Telltale deflection allows the wind 
      speed and direction to be quantified and image blur caused by its 
      oscillations provides information about wind turbulence.

      The Telltale data set consists of a single comma-delimited ASCII 
      table, TELLTALE.CSV, and its PDS label TELLTALE.LBL. 

      The table contains the following columns:

      Sol             Phoenix Sol
    
      LTST            Local True Time given in image header

      LMST            Local Mean Solar Time calculated from LTST

      v (m/s)         Wind speed in meters/second

      dv+ (m/s)       Error in wind speed (positive)

      dv- (m/s)       Error in wind speed (negative)

      Dir (deg)       Wind direction in degrees given in meteorological
                      convention (0 = from N, 90 = from E, 180 = from S, 
                      270 = from W)

      dDir (deg)      Error in direction (given in degrees)

      Exposure time   Exposure time by SSI in milliseconds

      File name       SSI image filename used for the analysis

      Processing 
      ==========

      This data set has been generated by analysis of SSI images of the 
      Telltale. The images have been analyzed to determine the position 
      of the Kapton     tube in the Telltale reference frame. The shift 
      from rest position is calculated, and the wind velocity and errors 
      determined from the methods described in [HOLSTEIN-RATHLOU2008, 
      GUNNLAUGSSON2008]. The directions are finally converted to 
      areographic directions using the orientation of the lander. The 
      result is an ASCII table of time, wind velocity and direction, 
      errors in wind velocity and directory, and names of SSI images 
      used to derive the values."
   
  CONFIDENCE_LEVEL_NOTE          = "
      Confidence Level Overview 
      =========================
      
      Estimated errors are included in the table.
   
      Data Coverage and Quality
      =========================

      Data coverage during the course of the Phoenix mission is 
      dependent on when the Surface Stereo Imager could be used to 
      obtain movies of the telltale. This typically occurs one to 
      several times per sol. Quality indicators are included in the 
      table in the form of wind velocity errors."

 END_OBJECT                      = DATA_SET_INFORMATION

 OBJECT                          = DATA_SET_MISSION
   MISSION_NAME                  = "PHOENIX"
 END_OBJECT                      = DATA_SET_MISSION

 OBJECT                          = DATA_SET_TARGET
  TARGET_NAME                    = MARS
 END_OBJECT                      = DATA_SET_TARGET

 OBJECT                          = DATA_SET_HOST
  INSTRUMENT_HOST_ID             = PHX
  INSTRUMENT_ID                  = TT
 END_OBJECT                      = DATA_SET_HOST

 OBJECT                          = DATA_SET_REFERENCE_INFORMATION
  REFERENCE_KEY_ID               = "HOLSTEIN-RATHLOU2008"
 END_OBJECT                      = DATA_SET_REFERENCE_INFORMATION

 OBJECT                          = DATA_SET_REFERENCE_INFORMATION
  REFERENCE_KEY_ID               = "GUNNLAUGSSON2008"
 END_OBJECT                      = DATA_SET_REFERENCE_INFORMATION

END_OBJECT                       = DATA_SET

END