HDF-EOS V2 MODIS L3 Surface Reflectance Product
Revision 6.0.0, 09-FEB-09

Product ID: MOD_PR09Q1

Description:
	MODIS Level-3 (L3) Land Surface Reflectance (LSR) - The L3 LSR product
	is a composite over a eight day period of the LSR data.  For each
	grid location one value is selected which is the best possible value
	of the surface reflectance.  The criteria for the choice are the
	cloudiness; cloud shadows; low solar zenith angle; and when several
	values pass these minimum quality criteria, the minimum channel 3
	(blue) value.

Point of Contact:
	Jim Ray
	Science Systems and Applications, Inc.
	NASA's Goddard Space Flight Center, Code 614.5
	Greenbelt, MD 20771


Principal Investigator:
	Eric Vermote
	NASA's Goddard Space Flight Center, Code 619
	Greenbelt, MD 20771

 ===========================================================================

ECS metadata

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ADDITIONALATTRIBUTENAME.6 = VERTICALTILENUMBER
ADDITIONALATTRIBUTENAME.7 = TILEID
ADDITIONALATTRIBUTENAME.8 = PROCESSVERSION
ADDITIONALATTRIBUTENAME.9 = RESOLUTIONBANDS1AND2
ADDITIONALATTRIBUTENAME.10 = QAPERCENTPOOROUTPUT250MBAND1
ADDITIONALATTRIBUTENAME.11 = QAPERCENTPOOROUTPUT250MBAND2

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OBJECT = NumberOfGranules
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END_OBJECT = NumberOfGranules
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END_OBJECT = GranuleDayNightFlag
OBJECT = GranuleDayOfYear
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END_OBJECT = GranuleDayOfYear
OBJECT = GranuleBeginningDateTime
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OBJECT = GranuleEndingDateTime
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OBJECT = PercentProcessed
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OBJECT = PercentLand
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OBJECT = PercentCloudy
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END_OBJECT = PercentShadow
OBJECT = PercentLowSun
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END


StructuralMetadata.0
    This string will be populated automatically by HDF-EOS.



Grid Structure:  MOD_Grid_250m_Surface_Reflectance

    Data Fields:
        sur_refl_b01, sur_refl_b02 and sur_refl_qc_250m

    Dimensions:

        Dimension Name                       	  Metadata Value

        YDim_MOD_Grid_250m_Surface_Reflectance    "DataRows250m"

        XDim_MOD_Grid_250m_Surface_Reflectance    "DataColumns250m"

    Corner Locations:

        Corner                Values

        UpperLeftPointMtrs    (Variable, Variable)

        LowerRightPointMtrs   (Variable, Variable)

    Geographic Grid Projection Parameters:

        Integrized Sinusoidal Projection
	    Projection	      GCTP_SNSOID
	    ProjParam[0]          6371007.181
	    ProjParam[1 to 7]     0.0
	    ProjParam[8]          21600
	    ProjParam[9]          0.0
	    ProjParam[10]         1.0
	    ProjParam[11 to 12]   0.0
	    Spherecode            -1
	    GridOrigin            HDFE_GD_UL

        Interrupted Goodes Homolosine Projection
	    Projection		  GCTP_GOOD
	    ProjParam[0 to 12]    0.0
	    Spherecode            19
	    GridOrigin            HDFE_GD_UL

        Lambert Azimuthal Equal Area Projection
	    Projection		  GCTP_LAMAZ
	    ProjParam[0]          6371228.0
	    ProjParam[1 to 5]     0.0
	    ProjParam[6]          Variable
	    ProjParam[7 to 12]    0.0
	    Spherecode            19
	    GridOrigin            HDFE_GD_UL


===========================================================================

Data Fields:

Each data field has at least the following 4 attributes:

        long_name (STRING)
        units (STRING)
        valid_range (agrees with data type of SDS)
        _FillValue (agrees with data type of SDS)

Some data fields also contain some of the following attributes:

        add_offset (float64)
        add_offset_err (float64)
        calibrated_nt (int32)
        scale_factor (float64)
        scale_factor_err (float64)
        QA bitmap index (STRING)

Data conversions:

        parameter =  scale_factor * (file data - add_offset)
        file data = (parameter / scale_factor) + add_offset

The dimensions for all SDSs are

  YDim_MOD_Grid_250m_Surface_Reflectance
  XDim_MOD_Grid_250m_Surface_Reflectance

A value of "Variable" indicates that this value will vary
according to the granule being processed.

===========================================================================

    Name		Data	Dimensions
			Type

    sur_refl_b01	INT16	(see grid structure)

    Description:
	MODIS Land Surface Reflectance for Band 1.

    HDF Attributes:
                                  Number of
	                          Values or
	                            Max.
	Attribute        Data      String    Value
	                 Type      Length

	long_name        STRING      60	     Surface_reflectance_for_band_1
	units            STRING      11      reflectance
	valid_range      INT16       2       -100, 16000
	_FillValue       INT16       1       -28672
	scale_factor     FLOAT64     1       0.0001
	add_offset       FLOAT64     1       0.0
	scale_factor_err  FLOAT64    1       0.0
	add_offset_err   FLOAT64     1       0.0
	calibrated_nt    INT32       1       5

===========================================================================

    Name		Data	Dimensions
			Type

    sur_refl_b02	INT16	(see grid structure)

    Description:
	MODIS Land Surface Reflectance for Band 2.

    HDF Attributes:
                                  Number of
	                          Values or
	                            Max.
	Attribute        Data      String    Value
	                 Type      Length

	long_name        STRING      60	     Surface_reflectance_for_band_2
	units            STRING      11      reflectance
	valid_range      INT16       2       -100, 16000
	_FillValue       INT16       1       -28672
	scale_factor     FLOAT64     1       0.0001
	add_offset       FLOAT64     1       0.0
	scale_factor_err  FLOAT64    1       0.0
	add_offset_err   FLOAT64     1       0.0
	calibrated_nt    INT32       1       5

===========================================================================

    Name		Data	Dimensions
			Type

    sur_refl_state_250m	UINT16	(see grid structure)

    Description:
	MODIS Land Surface Reflectance 250m State flags.

	Bit    Description
	15     PGE11 internal snow mask;
	       key: snow (1) or no snow (0)
	14     BRDF correction performed;
	       key: yes (1) or no (0)
	13     Pixel is adjacent to cloud;
	       key: yes (1) or no (0)
	12     Snow/ice flag;
	       key: yes (1) or no (0)
	11     PGE11 internal fire mask;
	       key: fire (1) or no fire (0)
	10     PGE11 internal cloud mask;
	       key: cloudy (1) or clear (0)
	8-9    Cirrus detected;
	       key: 00 (0): none
	            01 (1): small
		    10 (2): average
		    11 (3): high
	6-7    Aerosol quantity;
	       key: 00 (0): climatology
	            01 (1): low
		    10 (2): average
		    11 (3): high
	3-5    Land/water flag;
	       key: 000 (0): shallow ocean
        	    001 (1): land
	            010 (2): ocean coastlines and land shorelines
	            011 (3): shallow inland water
	            100 (4): ephemeral water
	            101 (5): deep inland water
	            110 (6): ocean
	            111 (7): surface unknown (treated as land)
	2      Cloud shadow;
	       key: yes (1) or no (0)
	0-1    Cloud state;
	       key: 00 (0): clear
	            01 (1): cloudy
        	    10 (2): mixed
	            11 (3): not set, assumed clear

    HDF Attributes:
                                  Number of
	                          Values or
	                            Max.
	Attribute        Data      String    Value
	                 Type      Length

	long_name        STRING      60     Surface_reflectance_250m_state_flags
	units            STRING      9      bit field
	valid_range      UINT16      2      0, 57343
	_FillValue       UINT16      1      65535
        QA bitmap index  STRING    2400     an index of how each value is
	                                    mapped (see the description, above)

===========================================================================

    Name		Data	Dimensions
			Type

    sur_refl_qc_250m	UINT16	(see grid structure)

    Description:
	MODIS Land Surface Reflectance 250m Band Quality Control flags.

	Bit     Description
	15	Spare (TBD)
	14	Different orbit from 500m;
		key: yes (1) or no (0)
	13      Adjacency correction performed;
	        key: yes (1) or no (0)
	12      Atmospheric correction performed;
	        key: yes (1) or no (0)
	8-11    Band 2 data quality, four bit range; test
	        key: 0000  (0): highest quality
                     0111  (7): noisy detector
                     1000  (8): dead detector; data copied from adjacent
                                detector
                     1001  (9): solar zenith >= 86 degrees
                     1010 (10): solar zenith >= 85 and < 86 degrees
                     1011 (11): missing input
	             1100 (12): internal constant used in place of
			        climatological data for at least one
				atmospheric constant
	             1101 (13): quality so low that it is not useful
	             1110 (14): L1B data faulty
	             1111 (15): not useful for any other reason/not
	                        processed (e.g. clouds, ocean)
	4-7     Band 1 data quality, four bit range;
	        key: (same as "Band 2 data quality")
	2-3     Spare (TBD)
	0-1	MODLAND QA bits;
	        key: 00 (0): corrected product produced at ideal
                             quality -- all bands
	             01 (1): corrected product produced,
		     	     less than ideal quality -- some or all bands
	             10 (2): corrected product not produced due to
	                     cloud effects -- all bands
	             11 (3): corrected product not produced for
	                     other reasons -- some or all bands,
	                     may be fill value
	        [Note that a value of (11) overrides a value of (01)]

    HDF Attributes:
                                  Number of
	                          Values or
	                            Max.
	Attribute        Data      String    Value
	                 Type      Length

	long_name        STRING      60      Surface_reflectance_250m_quality_control_flags
	units            STRING      9       bit field
	valid_range      UINT16      2       0, 32767
	_FillValue       UINT16      1       65535
        QA bitmap index  STRING    2200      an index of how each value is
	                                     mapped (see the description, above)