PDS_VERSION_ID            = "PDS3"

RECORD_TYPE               = FIXED_LENGTH
FILE_RECORDS              = 16384
RECORD_BYTES              = 32768
PRODUCT_VERSION_ID        = "V2.0"
DATA_SET_ID               = "MESS-E/V/H-MLA-4-GDR-V1.0"
PRODUCT_ID                = "HDEM_45N_250M"
STANDARD_DATA_PRODUCT_ID  = "MLASCIENCEGDR"
INSTRUMENT_HOST_NAME      = "MESSENGER"
INSTRUMENT_NAME           = "MERCURY LASER ALTIMETER"
INSTRUMENT_ID             = "MLA"
MISSION_PHASE_NAME        = {"MERCURY 1 FLYBY","MERCURY 2 FLYBY",
                            "MERCURY ORBIT","MERCURY ORBIT YEAR 2",
                            "MERCURY ORBIT YEAR 3","MERCURY ORBIT YEAR 4",
                            "MERCURY ORBIT YEAR 5"}
TARGET_NAME               = MERCURY
START_TIME                = 2008-01-14
STOP_TIME                 = 2015-04-30
PRODUCT_CREATION_TIME     = 2016-04-11
PRODUCT_RELEASE_DATE      = 2016-05-06
PRODUCER_ID               = MESSENGER_MLA_TEAM
PRODUCER_FULL_NAME        = "DAVID E. SMITH"
PRODUCER_INSTITUTION_NAME = "GODDARD SPACE FLIGHT CENTER"
DESCRIPTION               = "This data product is a shape map (radius)
   of Mercury at a resolution of 250m/pix by 250m/pix, true at the
   pole in polar stereographic (spherical) projection, based on altimetry
   data acquired by the MLA instrument.  The MLA Laser data through 
   Mercury Orbit Year 5 are the source for this gridded product.

   The ground tracks are interpolated using the Generic Mapping Tools
   programs 'mapproject', 'blockmedian' and 'surface'. The map is in the
   form of a binary table.  Map values are relative to a radius of 2439.4 km.

   This label describes an IMG file in the form of a binary resampling with
   pixel registration.  "

^IMAGE                    = "HDEM_45N_250M.IMG"
OBJECT                  = IMAGE
    NAME                  = HEIGHT
    DESCRIPTION           = "Each sample represents height relative to a
      reference radius (OFFSET) and is generated using altimetry data
      produced by the MLA team."
    LINES                 = 16384
    LINE_SAMPLES          = 16384
    MINIMUM               = -11255
    MAXIMUM               = 8181
    MISSING_CONSTANT      = -32768
    SAMPLE_TYPE           = LSB_INTEGER
    SAMPLE_BITS           = 16
    UNIT                  = METER
    SCALING_FACTOR        = 0.5
    OFFSET                = 2439400

/* NOTE:                                                                   */
/* Conversion from Digital Number to HEIGHT, i.e. elevation in meters, is: */
/* HEIGHT = (DN * SCALING_FACTOR).                                         */
/* The conversion from Digital Number to PLANETARY_RADIUS in meters is:    */
/* PLANETARY_RADIUS = (DN * SCALING_FACTOR) + OFFSET                       */
/* where OFFSET is the radius of a reference sphere.                       */
/* The planetopotential TOPOGRAPHY is PLANETARY_RADIUS - GEOID_RADIUS,     */
/* where GEOID_RADIUS is derived from a gravitational equipotential model. */
/* By convention, the average GEOID_RADIUS at the equator is OFFSET.       */

END_OBJECT              = IMAGE

OBJECT                    = IMAGE_MAP_PROJECTION
 ^DATA_SET_MAP_PROJECTION     = "DSMAP_POLAR.CAT"
 MAP_PROJECTION_TYPE          = "POLAR STEREOGRAPHIC"
 KEYWORD_LATITUDE_TYPE        = "PLANETOCENTRIC"
 MAP_RESOLUTION               = 170.344 <pix/deg>
 A_AXIS_RADIUS                = 2439.4 <km>
 B_AXIS_RADIUS                = 2439.4 <km>
 C_AXIS_RADIUS                = 2439.4 <km>
 FIRST_STANDARD_PARALLEL      = 'N/A'
 SECOND_STANDARD_PARALLEL     = 'N/A'
 POSITIVE_LONGITUDE_DIRECTION = "EAST"
 CENTER_LATITUDE              = 90 <deg>
 CENTER_LONGITUDE             = 0 <deg>
 REFERENCE_LATITUDE           = 'N/A'
 REFERENCE_LONGITUDE          = 'N/A'
 LINE_FIRST_PIXEL             = 1
 LINE_LAST_PIXEL              = 16384
 SAMPLE_FIRST_PIXEL           = 1
 SAMPLE_LAST_PIXEL            = 16384
 MAP_PROJECTION_ROTATION      = 0.0
 MAP_SCALE                    = 250 <m/pix>
 MAXIMUM_LATITUDE             = 90 <deg>
 MINIMUM_LATITUDE             = 45 <deg>
 WESTERNMOST_LONGITUDE        = 'N/A'
 EASTERNMOST_LONGITUDE        = 'N/A'
 LINE_PROJECTION_OFFSET       = 8191.5 <pixel>
 SAMPLE_PROJECTION_OFFSET     = 8191.5 <pixel>
 COORDINATE_SYSTEM_TYPE       = "BODY-FIXED ROTATING"
 COORDINATE_SYSTEM_NAME       = "PLANETOCENTRIC"
END_OBJECT                    = IMAGE_MAP_PROJECTION

END