HDF-EOS V2 MODIS L2G-lite Land Surface Reflectance File Specification
Revision 2.0 (10/15/2013)
Product ID(s): MOD09 L2G 1DY 1KM AND 500M (MOD09GA)
Description:
The MODIS 1km and 500m Resolution Level 2G (L2G) Land Surface Reflectance
file contains the restructured Level 2 (L2) Land Surface Reflectance data
(observations) which intersects a geographic area, a tile, in the MODIS Land
global Level 3 (L3) grid. The global L3 grid is divided into a number of
tiles, areas with a nominal size of 1100 km by 1100 km (10 deg. by 10 deg.).
The data is stored at a nominal grid resolutions of 1km and 500m.
The 1km and 500m observations are stored in a nested hierarchy of grid cells
with the four finer resolution 500m observations stored in the grid cell
location corresponding to the coarser 1km resolution cells containing data
from the same orbit.
A single 1km observation consist of the 1km reflectance state QA data,
spacecraft viewing angles, spacecraft range, solar viewing angles, geolocation
QA flags and the orbit and granule pointer fields.
A single 500m surface reflectance observation consist of the surface
reflectance for Bands 1 to 7, the corresponding Quality Assurance (QA) data,
and the 500m observation coverage (obscov). The observation coverage
field gives a estimate of the intersection between the observation and the grid
cell (relative to the observation area). Within each 1km grid cell there
can be several corresponding 500m observations and these observations may be
from different scans, so there is an observation layer pointer (iobs_res) that
specifies which of the 1km observations is associated with each of the four 500m
observations. To relate to 250m observations that is stored in a seperate
corresponding 250m L2G file (MOD09GQ), there is a 250m scan value (q_scan) that
states whether the corresponding 250m observations from the same orbit are
available for the 500m observation, and also states whether the 250m
observations are from the same or a different scan.
The 500m observations (and corresponding 1km observations) are chosen in the
following three steps:
1. First, one 500m observation in each orbit for each grid cell is selected by
selecting the one with the largest observation coverage.
2. Next, for a 500m grid cell, the 500m observations with the maximum
observation coverage for each orbit are selected and sorted in the order of
ascending orbit numbers (earliest first).
3. The first layer is then selected using the same compositing criteria as is
used in the 8-day surface reflectance product (as of June 2005). The
observation with the highest score is pulled up to the first layer and stored.
Note that the scoring does not use a maximum observation coverage criteria, it
uses: 1) best observation based on a QA score; and 2) then for observations with
the same QA score and that are close to the smallest observed blue value, the
one with the lowest view zenith angle.
The observation coverage is stored with each observation so the end-user can
always reorder the observations using whatever criteria they want, once they
read them in.
This new format reduces the number of 1km and 500m L2G files from five files to
one file per day for each tile. The mapping between the original L2G files and
this new L2G file is:
MOD09GST - all SDSs
MODPT1KD - no SDSs
MODMGGAD - all SDSs
MOD09GHK - all SDSs except orb_cov)
MODPTHKM - only the obscov and iobs_res SDSs
There are two ways to which the observation data can be stored in a L2G
grid file, full and compact. The actual method is specified by the
L2GStorageFormat1km and L2GStorageFormat500m metadata values. In both methods,
the first layer of observations is stored in a 2 dimensional array. In the
full method, all of the values are stored in a 3 dimensional array with the
slowest varying dimension specifying the observation layer. This is an
inefficient storage method because typically a large number of cells are empty.
For the compact method, the additional observation values are stored in a single
dimensional array, with the dimension corresponding to the number of
additional observations since the beginning of the file. Essentially, the
additional observations are run-length encoded with each observation stored
sequentially for each cell.
In addition, the a run-time parameter may specify that only the first layer
be stored, in which case the additional arrays are not stored.
Points of Contact:
Robert Wolfe
NASA's Goddard Space Flight Center, Code 614.5
Greenbelt, MD 20771
(301) 614-5508
robert.e.wolfe@nasa.gov
Principal Investigator:
Eric Vermote
University of Maryland, College Park
NASA's Goddard Space Flight Center, Code 614.5
Greenbelt, MD 20771
(301) 405-8052
vermote@kratmos.gsfc.nasa.gov
===========================================================================
Generic Constructs
ECS Metadata Strings:
Notes: "FR" is an abbreviation for "FREE_RANGE".
"D/T" is an abbreviation for "DATE/TIME"
(A) implies that multiple values are stored within a
single array.
A value of "Variable" indicates that this value will vary
according to the granule being processed.
"M" means class M.
CoreMetadata.0
This string will contain the following PVL fields:
# of
Field Name Data Value Value
Type s
GROUP = INVENTORYMETADATA
GROUP = CollectionDescriptionClass
SHORTNAME STRING 1 "MOD09GA"
VERSIONID STRING 1 Variable
END_GROUP = CollectionDescriptionClass
GROUP = ECSDataGranule
REPROCESSINGPLANNED STRING 1 "further update
is anticipated"
REPROCESSINGACTUAL STRING 1 "reprocessed"
LOCALGRANULEID STRING 1 Variable
DAYNIGHTFLAG STRING 1 Variable
PRODUCTIONDATETIME D/T 1 Variable
LOCALVERSIONID STRING 1 Variable
SIZEMBECSDATAGRANULE DOUBLE 1 Variable
END_GROUP = ECSDataGranule
GROUP = PGEVersionClass
PGEVERSION STRING 1 Variable
END_GROUP = PGEVersionClass
GROUP = InputGranule
INPUTPOINTER STRING FR (A) Variable
END_GROUP = InputGranule
GROUP = RangeDateTime
RANGEBEGINNINGDATE DATE 1 Variable
RANGEBEGINNINGTIME TIME 1 Variable
RANGEENDINGDATE DATE 1 Variable
RANGEENDINGTIME TIME 1 Variable
END_GROUP = RangeDateTime
GROUP = GRing
EXCLUSIONGRINGFLAG STRING 1 "N"
END_GROUP = GRing
GROUP = GRingPoint
GRINGPOINTLATITUDE DOUBLE 4 (A) Variable
GRINGPOINTLONGITUDE DOUBLE 4 (A) Variable
GRINGPOINTSEQUENCENO INTEGER 4 (A) Variable
END_GROUP = GRingPoint
GROUP = ZoneIdentifierClass
ZONEIDENTIFIER STRING 1 "0"
END_GROUP = ZoneIdentifierClass
GROUP = OrbitCalculatedSpatialDomain
** number of containers is equal to "NumberofOrbits" **
ORBITNUMBER INTEGER 1 Variable
EQUATORCROSSINGLONGITUDE DOUBLE 1 Variable
EQUATORCROSSINGDATE DATE 1 Variable
EQUATORCROSSINGTIME TIME 1 Variable
END_GROUP = OrbitCalculatedSpatialDomain
GROUP = MeasuredParameter
PARAMETERNAME STRING FR (A) "MOD09G"
GROUP = QAFLAGS
AUTOMATICQUALITYFLAG STRING 1 Variable
AUTOMATICQUALITYFLAGEXPLANATION
STRING 1 Variable
SCIENCEQUALITYFLAG STRING 1 Variable
SCIENCEQUALITYFLAGEXPLANATION
STRING 1 Variable
END_GROUP = QAFlags
GROUP = QAStats
QAPERCENTMISSINGDATA INTEGER 1 Variable
QAPERCENTOUTOFBOUNDSDATA INTEGER 1 Variable
QAPERCENTINTERPOLATEDDATA INTEGER 1 Variable
END_GROUP = QAStats
END_GROUP = MeasuredParameter
GROUP = AssociatedPlatformInstrumentSensor
ASSOCIATEDPLATFORMSHORTNAME STRING 1 "Terra/Aqua"
ASSOCIATEDINSTRUMENTSHORTNAME STRING 1 "MODIS"
ASSOCIATEDSENSORSHORTNAME STRING 1 "MODIS"
END_GROUP = AssociatedPlatformInstrumentSensor
GROUP = AdditionalAttributes
ADDITIONALATTRIBUTENAME STRING FR (A) Variable
PARAMETERVALUE STRING FR (A) Variable
ADDITIONALATTRIBUTENAME.1 = "QAPERCENTGOODQUALITY"
ADDITIONALATTRIBUTENAME.2 = "QAPERCENTOTHERQUALITY"
ADDITIONALATTRIBUTENAME.3 = "QAPERCENTNOTPRODUCEDCLOUD"
ADDITIONALATTRIBUTENAME.4 = "QAPERCENTNOTPRODUCEDOTHER"
ADDITIONALATTRIBUTENAME.5 = "HORIZONTALTILENUMBER"
ADDITIONALATTRIBUTENAME.6 = "VERTICALTILENUMBER"
ADDITIONALATTRIBUTENAME.7 = "TileID"
ADDITIONALATTRIBUTENAME.8 = "PROCESSVERSION"
ADDITIONALATTRIBUTENAME.9 = "QAPERCENTPOOROUTPUT500MBAND1"
ADDITIONALATTRIBUTENAME.10 = "QAPERCENTPOOROUTPUT500MBAND2"
ADDITIONALATTRIBUTENAME.11 = "QAPERCENTPOOROUTPUT500MBAND3"
ADDITIONALATTRIBUTENAME.12 = "QAPERCENTPOOROUTPUT500MBAND4"
ADDITIONALATTRIBUTENAME.13 = "QAPERCENTPOOROUTPUT500MBAND5"
ADDITIONALATTRIBUTENAME.14 = "QAPERCENTPOOROUTPUT500MBAND6"
ADDITIONALATTRIBUTENAME.15 = "QAPERCENTPOOROUTPUT500MBAND7"
ADDITIONALATTRIBUTENAME.16 = "RESOLUTIONBANDS1AND2"
ADDITIONALATTRIBUTENAME.17 = "identifier_product_doi"
ADDITIONALATTRIBUTENAME.18 = "identifier_product_doi_authority"
END_GROUP = AdditionalAttributes
END_GROUP = INVENTORYMETADATA
ArchiveMetadata.0
This string will contain the following PVL fields:
# of
Field Name Data Value Value
Type s
GROUP = ARCHIVEMETADATA
GROUP = BoundingRectangle
WESTBOUNDINGCOORDINATE DOUBLE 1 Variable
NORTHBOUNDINGCOORDINATE DOUBLE 1 Variable
EASTBOUNDINGCOORDINATE DOUBLE 1 Variable
SOUTHBOUNDINGCOORDINATE DOUBLE 1 Variable
END_GROUP = BoundingRectangle
GEOANYABNORMAL STRING 1 Variable
GEOESTMAXRMSERROR DOUBLE 1 Variable
LONGNAME STRING 1 "MODIS/Terra Surface
Reflectance Daily L2G Global 1km and 500m SIN Grid"
SPSOPARAMETERS STRING 1 "2015"
PROCESSINGCENTER STRING 1 "MODAPS"
NUMBEROFOVERLAPGRANULES INTEGER 1 Variable
NUMBEROFINPUTGRANULES INTEGER 1 Variable
NUMBEROFGRANULES INTEGER 1 Variable
GRANULENUMBERARRAY INTEGER FR(A) Variable
GRANULEPOINTERARRAY INTEGER FR(A) Variable
ORBITNUMBERARRAY INTEGER FR(A) Variable
NUMBEROFORBITS INTEGER 1 Variable
GRANULEBEGINNINGDATETIME STRING "NumberofGranules"
Variable
GRANULEENDINGDATETIME STRING "NumberofGranules"
Variable
GRANULEDAYNIGHTFLAG STRING "NumberofGranules"
Variable
GRANULEDAYOFYEAR INTEGER "NumberofGranules"
Variable
GRANULEBEGINNINGDATETIMEARRAY STRING FR(A) Variable
GRANULEENDINGDATETIMEARRAY STRING FR(A) Variable
GRANULEDAYNIGHTFLAGARRAY STRING FR(A) Variable
NADIRDATARESOLUTION1KM STRING 1 Variable
CHARACTERISTICBINANGULARSIZE1KM DOUBLE 1 Variable
CHARACTERISTICBINSIZE1KM DOUBLE 1 Variable
DATACOLUMNS1KM INTEGER 1 Variable
DATAROWS1KM INTEGER 1 Variable
GLOBALGRIDCOLUMNS1KM INTEGER 1 Variable
GLOBALGRIDROWS1KM INTEGER 1 Variable
MAXIMUMOBSERVATIONS1KM INTEGER 1 Variable
ADDITIONALLAYERS1KM INTEGER 1 Variable
TOTALOBSERVATIONS1KM INTEGER 1 Variable
TOTALADDITIONALOBSERVATIONS1KM INTEGER 1 Variable
COVERAGECALCULATIONMETHOD STRING 1 Variable
FIRSTLAYERSELECTIONCRITERIA STRING 1 Variable
L2GSTORAGEFORMAT1KM STRING 1 Variable
QUALITYCLASSPERCENTAGE500MBAND3 INTEGER 16 Variable
QUALITYCLASSPERCENTAGE500MBAND4 INTEGER 16 Variable
QUALITYCLASSPERCENTAGE500MBAND5 INTEGER 16 Variable
QUALITYCLASSPERCENTAGE500MBAND6 INTEGER 16 Variable
QUALITYCLASSPERCENTAGE500MBAND7 INTEGER 16 Variable
PROCESSINGENVIRONMENT STRING 1 Variable
DESCRREVISION STRING 1 Variable
SYSTEMFILENAME STRING FR (A) Variable
NADIRDATARESOLUTION500M STRING 1 Variable
CHARACTERISTICBINANGULARSIZE500M DOUBLE 1 Variable
CHARACTERISTICBINSIZE500M DOUBLE 1 Variable
DATACOLUMNS500M INTEGER 1 Variable
DATAROWS500M INTEGER 1 Variable
GLOBALGRIDCOLUMNS500M INTEGER 1 Variable
GLOBALGRIDROWS500M INTEGER 1 Variable
MAXIMUMOBSERVATIONS500M INTEGER 1 Variable
ADDITIONALLAYERS500M INTEGER 1 Variable
TOTALOBSERVATIONS500M INTEGER 1 Variable
TOTALADDITIONALOBSERVATIONS500M INTEGER 1 Variable
PERCENTPROCESSED INTEGER 1 Variable
PERCENTLAND INTEGER 1 Variable
PERCENTLANDSEAMASKCLASS INTEGER 8 Variable
PERCENTCLOUDY INTEGER 1 Variable
PERCENTSHADOW INTEGER 1 Variable
PERCENTLOWSUN INTEGER 1 Variable
RANKING STRING 1 Variable
KEEPALL STRING 1 Variable
COVERAGEMINIMUM DOUBLE 1 Variable
MAXOUTPUTRES STRING 1 Variable
DEEPOCEANFLAG STRING 1 Variable
L2GSTORAGEFORMAT500M STRING 1 Variable
QUALITYCLASSPERCENTAGE500MBAND1 INTEGER 16 Variable
QUALITYCLASSPERCENTAGE500MBAND2 INTEGER 16 Variable
CLOUDOPTION STRING 1 Variable
******************************************************************
* 1. The field "L2GStorageFormat1km" and "L2GStorageFormat500m
* is either "full", "compact" or "one layer only".
* 2. The field "CoverageCalculationMethod" is either
* "area" or "volume".
* 3. The field "FirstLayerSelectionCriteria" is either
* "nearest neighbor" or "maximum observation coverage".
******************************************************************
END_GROUP = ARCHIVEMETADATA
StructuralMetadata.0
This string will be populated automatically by HDF-EOS.
Grid Structure: MODIS_Grid_1km_2D
Dimensions:
Dimension Name Value
YDim:MODIS_Grid_1km_2D "DataRows1km"
XDim:MODIS_Grid_1km_2D "DataColumns1km"
Corner Locations:
Corner Values
UpperLeftPointMtrs (Variable, Variable)
LowerRightPointMtrs (Variable, Variable)
Geographic Grid Projection Parameters:
Supported Grids: Integerized Sinusoidal (GCTP_ISINUS)
Sinusoidal (GCTP_SNSOID)
Interrupted Goodes Homolosine (GCTP_GOOD)
Lambert Azimuthal Equal Area (GCTP_LAMAZ)
Projection gridID = GCTP_ISINUS
ProjParam[0] 6371007.181
ProjParam[1 to 7] 0.0
ProjParam[8] 86400
ProjParam[9] 0.0
ProjParam[10] 1.0
ProjParam[11 to 12] 0.0
Spherecode -1
GridOrigin HDFE_GD_UL
Projection gridID = GCTP_SNSOID
ProjParam[0] 6371007.181
ProjParam[1 to 12] 0.0
Spherecode -1
GridOrigin HDFE_GD_UL
Projection gridID = GCTP_GOOD
ProjParam[0 to 12] 0.0
Spherecode 19
GridOrigin HDFE_GD_UL
Projection gridID = 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
Grid Structure: MODIS_Grid_500m_2D
Dimensions:
Dimension Name Value
YDim:MODIS_Grid_500m_2D "DataRows500m"
XDim:MODIS_Grid_500m_2D "DataColumns500m"
Corner Locations: (same as MODIS_Grid_1km_2D)
Geographic Grid Projection Parameters: (same as MODIS_Grid_1km_2D)
Grid Structure: MODIS_Grid_1km_3D
Dimensions:
Dimension Name Value
Additional Layers:MODIS_Grid_1km_3D "AdditionalLayers1km"
YDim:MODIS_Grid_1km_3D "DataRows1km"
XDim:MODIS_Grid_1km_3D "DataColumns1km"
Corner Locations: (same as MODIS_Grid_1km_2D)
Geographic Grid Projection Parameters: (same as MODIS_Grid_1km_2D)
Grid Structure: MODIS_Grid_500m_3D
Dimensions:
Dimension Name Value
Additional Layers:MODIS_Grid_500m_3D "AdditionalLayers500m"
YDim:MODIS_Grid_500m_3D "DataRows500m"
XDim:MODIS_Grid_500m_3D "DataColumns500m"
Corner Locations: (same as MODIS_Grid_1km_2D)
Geographic Grid Projection Parameters: (same as MODIS_Grid_1km_2D)
===========================================================================
Additional global attributes:
Data
Name Type
maximum_observations_1km INT8
total_additional_observations_1km INT32
l2g_storage_format_1km STRING
maximum_observations_500m INT8
total_additional_observations_500m INT32
l2g_storage_format_500m STRING
NumberLandWater1km INT32
NumberLandWater500m INT32
identifier_product_doi STRING
identifier_product_doi_authority STRING
===========================================================================
DataFields:
The following datafields are always in this file:
num_observations_1km
state_1km_1
SensorZenith_1
SensorAzimuth_1
Range_1
SolarZenith_1
SolarAzimuth_1
gflags_1
orbit_pnt_1
granule_pnt_1
num_observations_500m
sur_refl_b03_1
sur_refl_b04_1
sur_refl_b05_1
sur_refl_b06_1
sur_refl_b07_1
QC_500m_1
obscov_500m_1
iobs_res_1
q_scan_1
The following datafields are only present if the L2G MOD09GHK inputs contains
the 500m band 1 and 2 data fields: "500m Surface Reflectance Band 1" and
"500m Surface Reflectance Band 2".
sur_refl_b01_1
sur_refl_b02_1
If the "L2GStorageFormat1km" metadata value is "full", the following
datafields are also present:
state_1km_f
SensorZenith_f
SensorAzimuth_f
Range_f
SolarZenith_f
SolarAzimuth_f
gflags_f
orbit_pnt_f
granule_pnt_f
If the "L2GStorageFormat500m" metadata value is "full", the following
datafields are also present:
sur_refl_b03_f
sur_refl_b04_f
sur_refl_b05_f
sur_refl_b06_f
sur_refl_b07_f
QC_500m_f
obscov_500m_f
iobs_res_f
q_scan_f
and if the L2 MOD09 inputs contains the 500m band 1 and 2 data fields:
sur_refl_b01_f
sur_refl_b02_f
If the "L2GStorageFormat1km" metadata value is "compact", the following
datafields are also present:
state_1km_c
SensorZenith_c
SensorAzimuth_c
Range_c
SolarZenith_c
SolarAzimuth_c
gflags_c
orbit_pnt_c
granule_pnt_c
nadd_obs_row_1km
If "L2GStorageFormat500m" metadata value is "compact", the following
datafields are also present:
sur_refl_b03_c
sur_refl_b04_c
sur_refl_b05_c
sur_refl_b06_c
sur_refl_b07_c
QC_500m_c
obscov_500m_c
iobs_res_c
q_scan_c
nadd_obs_row_500m
and if the L2 MOD09 inputs contains the 500m band 1 and 2 data fields:
sur_refl_b01_c
sur_refl_b02_c
Each datafield 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 datafields also contain the following 5 attributes:
add_offset (float64)
add_offset_err (float64)
calibrated_nt (int32)
scale_factor (float64)
scale_factor_err (float64)
Nadir Data Resolution (STRING - either "500m" or "1km")
QA index (STRING)
===========================================================================
Name Data Dimensions
Type
num_observations_1km INT8 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
Description:
The number of 1km observations per pixel contained within
this L2G file. In addition, if the value is less than zero,
it means that intersections were not computed for this cell.
If it is -1, it is part of the fill region of the grid. If it
is -2, it is in the area identified as 'non-production' in the
Land Production Mask.
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 22 "Number of observations"
units STRING 4 "none"
valid_range INT8 2 0, 127
_FillValue INT8 1 -1
===========================================================================
Name Data Dimensions
Type
state_1km_1 UINT16 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
state_1km_f UINT16 "Additional Layers:MODIS_Grid_1km_3D",
"YDim:MOD_Grid_L2g_3D",
"XDim:MOD_Grid_L2g_3D"
state_1km_c UINT16 "TotalAdditionalObservations1km"
metadata value
Description:
1km Reflectance Data State QA
"state_1km_1" is for storing the first layer of observations
and is always stored.
"state_1km_f" and "state_1km_c" are for storing the
additional layers of observations. "state_1km_f" is for the
full format and is stored only if "L2GStorageFormat1km" is "full".
"state_1km_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
Note: Bits are listed from the MSB (bit 15) to the LSB (bit 0).
Bit(s) Description
15 internal snow mask; snow (1) or no snow (0)
14 BRDF correction performed; yes (1) or no (0)
13 Pixel is adjacent to cloud; yes (1) or no (0)
12 MOD35 snow/ice flag; yes(1) or no(0)
11 internal fire algorithm flag; fire (1) or no fire (0)
10 internal cloud algorithm flag; cloud (1) or no cloud (0)
8-9 cirrus detected; none (00), small (01), average (10),
high (11)
6-7 aerosol quantity; climatology (00), low (01) average (10),
high (11)
3-5 land/water flag; class definitions:
000 -- shallow ocean
001 -- land
010 -- ocean coastlines and land shorelines
011 -- shallow inland water
100 -- ephemeral water
101 -- deep inland water
110 -- continental/moderate ocean
111 -- deep ocean
2 cloud shadow; yes (1) or no (0)
0-1 cloud state; clear (00), cloudy (01), mixed (10), not
set, assumed clear (11)
Note that all bit flags in this SDS can be applied
to the respective 500m and 250m reflectance data.
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 58 Variable
units STRING 9 "bit field"
valid_range UINT16 2 0, 57335
_FillValue UINT16 1 65535
Nadir Data Resolution
STRING 3 "1km"
QA index STRING 1500 Variable
Note: The attribute "long_name" is
"1km Reflectance Data State QA - first layer" for "state_1km_1",
"1km Reflectance Data State QA - additional layers, full"
for "state_1km_f", or
"1km Reflectance Data State QA - additional layers, compact"
for "state_1km_c".
===========================================================================
Name Data Dimensions
Type
SensorZenith_1 INT16 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
SensorZenith_f INT16 "Additional Layers:MODIS_Grid_1km_3D",
"YDim:MODIS_Grid_1km_3D",
"XDim:MODIS_Grid_1km_3D"
SensorZenith_c INT16 "TotalAdditionalObservations1km"
metadata value
Description:
Zenith angle to sensor.
"SensorZenith_1" is for storing the first layer of observations
and is always stored.
"SensorZenith_f" and "SensorZenith_c" are for storing the
additional layers of observations. "SensorZenith_f" is for the
full format and is stored only if "L2GStorageFormat1km" is "full".
"SensorZenith_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 42 Variable
units STRING 6 "degree"
valid_range INT16 2 0, 18000
_FillValue INT16 1 -32767
scale_factor FLOAT64 1 0.01
Note: The attribute "long_name" is
"Sensor zenith - first layer" for "SensorZenith_1",
"Sensor zenith - additional layers, full"
for "SensorZenith_f", or
"Sensor zenith - additional layers, compact"
for "SensorZenith_c".
===========================================================================
Name Data Dimensions
Type
SensorAzimuth_1 INT16 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
SensorAzimuth_f INT16 "Additional Layers:MODIS_Grid_1km_3D",
"YDim:MODIS_Grid_1km_3D",
"XDim:MODIS_Grid_1km_3D"
SensorAzimuth_c INT16 "TotalAdditionalObservations1km"
metadata value
Description:
Azimuth angle to sensor.
"SensorAzimuth_1" is for storing the first layer of observations
and is always stored.
"SensorAzimuth_f" and "SensorAzimuth_c" are for storing the
additional layers of observations. "SensorAzimuth_f" is for the
full format and is stored only if "L2GStorageFormat1km" is "full".
"SensorAzimuth_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 43 Variable
units STRING 6 "degree"
valid_range INT16 2 -18000, 18000
_FillValue INT16 1 -32767
scale_factor FLOAT64 1 0.01
Note: The attribute "long_name" is
"Sensor azimuth - first layer" for "SensorAzimuth_1",
"Sensor azimuth - additional layers, full"
for "SensorAzimuth_f", or
"Sensor azimuth - additional layers, compact"
for "SensorAzimuth_c".
===========================================================================
Name Data Dimensions
Type
Range_1 UINT16 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
Range_f UINT16 "Additional Layers:MODIS_Grid_1km_3D",
"YDim:MODIS_Grid_1km_3D",
"XDim:MODIS_Grid_1km_3D"
Range_c UINT16 "TotalAdditionalObservations1km"
metadata value
Description:
Distance to sensor.
"Range_1" is for storing the first layer of observations
and is always stored.
"Range_f" and "Range_c" are for storing the
additional layers of observations. "Range_f" is for the
full format and is stored only if "L2GStorageFormat1km" is "full".
"Range_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 34 Variable
units STRING 6 "meters"
valid_range UINT16 2 27000, 65535
_FillValue UINT16 1 0
scale_factor FLOAT64 1 25.0
Note: The attribute "long_name" is
"Range - first layer" for "Range_1",
"Range - additional layers, full" for "Range_f", or
"Range - additional layers, compact" for "Range_c".
===========================================================================
Name Data Dimensions
Type
SolarZenith_1 INT16 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
SolarZenith_f INT16 "Additional Layers:MODIS_Grid_1km_3D",
"YDim:MODIS_Grid_1km_3D",
"XDim:MODIS_Grid_1km_3D"
SolarZenith_c INT16 "TotalAdditionalObservations1km"
metadata value
Description:
Zenith angle to sun.
"SolarZenith_1" is for storing the first layer of observations
and is always stored.
"SolarZenith_f" and "SolarZenith_c" are for storing the
additional layers of observations. "SolarZenith_f" is for the
full format and is stored only if "L2GStorageFormat1km" is "full".
"SolarZenith_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 41 Variable
units STRING 6 "degree"
valid_range INT16 2 0, 18000
_FillValue INT16 1 -32767
scale_factor FLOAT64 1 0.01
Note: The attribute "long_name" is
"Solar zenith - first layer" for "SolarZenith_1",
"Solar zenith - additional layers, full" for "SolarZenith_f", or
"Solar zenith - additional layers, compact" for "SolarZenith_c".
===========================================================================
Name Data Dimensions
Type
SolarAzimuth_1 INT16 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
SolarAzimuth_f INT16 "Additional Layers:MODIS_Grid_1km_3D",
"YDim:MODIS_Grid_1km_3D",
"XDim:MODIS_Grid_1km_3D"
SolarAzimuth_c INT16 "TotalAdditionalObservations1km"
metadata value
Description:
Azimuth angle to sun.
"SolarAzimuth_1" is for storing the first layer of observations
and is always stored.
"SolarAzimuth_f" and "SolarAzimuth_c" are for storing the
additional layers of observations. "SolarAzimuth_f" is for the
full format and is stored only if "L2GStorageFormat1km" is "full".
"SolarAzimuth_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 42 Variable
units STRING 6 "degree"
valid_range INT16 2 -18000, 18000
_FillValue INT16 1 -32767
scale_factor FLOAT64 1 0.01
Note: The attribute "long_name" is
"Solar azimuth - first layer" for "SolarAzimuth_1",
"Solar azimuth - additional layers, full" for "SolarAzimuth_f", or
"Solar azimuth - additional layers, compact" for "SolarAzimuth_c".
===========================================================================
Name Data Dimensions
Type
gflags_1 UINT8 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
gflags_f UINT8 "Additional Layers:MODIS_Grid_1km_3D",
"YDim:MODIS_Grid_1km_3D",
"XDim:MODIS_Grid_1km_3D"
gflags_c UINT8 "TotalAdditionalObservations1km"
metadata value
Description:
Geolocation flags.
Bit(s) Description
0-2 fill (zero)
3 sensor range validity flag; valid (0) or invalid (1)
4 digital elevation model quality flag; valid (0) or
missing/inferior (1)
5 terrain data validity flag; valid (0) or invalid (1)
6 ellipsoid intersection flag; valid intersection (0) or
no intersection (1)
7 input data flag; valid (0), invalid (1)
"gflags_1" is for storing the first layer of observations
and is always stored.
"gflags_f" and "gflags_c" are for storing the
additional layers of observations. "gflags_f" is for the
full format and is stored only if "L2GStorageFormat1km" is "full".
"gflags_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 46 Variable
units STRING 6 "bit field"
valid_range UINT8 2 0, 248
_FillValue UINT8 1 255
Note: The attribute "long_name" is
"Geolocation flags - first layer" for "gflags_1",
"Geolocation flags - additional layers, full" for "gflags_f", or
"Geolocation flags - additional layers, compact" for "gflags_c".
===========================================================================
Name Data Dimensions
Type
orbit_pnt_1 INT8 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
orbit_pnt_f INT8 "Additional Layers:MODIS_Grid_1km_3D",
"YDim:MODIS_Grid_1km_3D",
"XDim:MODIS_Grid_1km_3D"
orbit_pnt_c INT8 "TotalAdditionalObservations1km"
metadata value
Description:
Pointer to the orbit information for each 1km observation. This value
is zero relative, with zero (0) refering to the first orbit in the
"OrbitCalculatedSpatialDomain" HDF EOS inventory metadata group.
"orbit_pnt_1" is for storing the first layer of observations
and is always stored.
"orbit_pnt_f" and "orbit_pnt_c" are for storing the
additional layers of observations. "orbit_pnt_f" is for the
full format and is stored only if "L2GStorageFormat1km" is "full".
"orbit_pnt_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 42 Variable
units STRING 6 "none"
valid_range INT8 2 0, 15
_FillValue INT8 1 -1
Note: The attribute "long_name" is
"Orbit pointer - first layer" for "orbit_pnt_1",
"Orbit pointer - additional layers, full" for "orbit_pnt_f", or
"Orbit pointer - additional layers, compact" for "orbit_pnt_c".
===========================================================================
Name Data Dimensions
Type
granule_pnt_1 UINT8 "YDim:MODIS_Grid_1km_2D",
"XDim:MODIS_Grid_1km_2D"
granule_pnt_f UINT8 "Additional Layers:MODIS_Grid_1km_3D",
"YDim:MODIS_Grid_1km_3D",
"XDim:MODIS_Grid_1km_3D"
granule_pnt_c UINT8 "TotalAdditionalObservations1km"
metadata value
Description:
Pointer to the granule information for each 1km observation. This value
is zero relative, with zero (0) refering to the first overlap granule in the
"GranulePointerArray" HDF EOS ArchiveMetadata group.
"granule_pnt_1" is for storing the first layer of observations
and is always stored.
"granule_pnt_f" and "granule_pnt_c" are for storing the
additional layers of observations. "orbit_pnt_f" is for the
full format and is stored only if "L2GStorageFormat1km" is "full".
"orbit_pnt_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 42 Variable
units STRING 6 "none"
valid_range UINT8 2 0, 254
_FillValue UINT8 1 255
Note: The attribute "long_name" is
"Granule pointer - first layer" for "granule_pnt_1",
"Granule pointer - additional layers, full" for "granule_pnt_f", or
"Granule pointer - additional layers, compact" for "granule_pnt_c".
===========================================================================
Name Data Dimensions
Type
nadd_obs_row_1km INT32 "DataRows1km" metadata value
Description:
The number of additional observations in each row in the
compact storage form of the L2G grid.
This field is only stored if "L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 41 "Number of additional observations
per row"
units STRING 4 "none"
valid_range INT32 2 0, INT32_MAX
_FillValue INT32 1 -1
===========================================================================
Name Data Dimensions
Type
num_observations_500m INT8 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
Description:
The number of 500m observations per pixel contained within
this L2G file. In addition, if the value is less than zero,
it means that intersections were not computed for this cell.
If it is -1, it is part of the fill region of the grid. If it
is -2, it is in the area identified as 'non-production' in the
Land Production Mask.
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 22 "Number of observations"
units STRING 4 "none"
valid_range INT8 2 0, 127
_FillValue INT8 1 -1
===========================================================================
Name Data Dimensions
Type
suf_refl_b01_1 INT16 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
suf_refl_b01_f INT16 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
suf_refl_b01_c INT16 "TotalAdditionalObservations500m"
metadata value
Description:
MODIS Land Surface Reflectance for Band 1.
"suf_refl_b01_1" is for storing the first layer of observations
and is always stored.
"sur_refl_b01_f" and "sur_refl_b01_c" are for storing the
additional layers of observations. "suf_refl_b01_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"suf_refl_b01_c" is for the compact format and is stored only if
"L2GStorageFormat1km" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 60 Variable
units STRING 11 "reflectance"
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28672
add_offset FLOAT64 1 0.0
add_offset_err FLOAT64 1 0.0
calibrated_nt INT32 1 5
scale_factor FLOAT64 1 10000.0
scale_factor_err FLOAT64 1 0.0
Nadir Data Resolution
STRING 4 "500m"
Note: The attribute "long_name" is
"500m Surface Reflectance Band 1 - first layer" for "sur_refl_b01_1",
"500m Surface Reflectance Band 1 - additional layers, full"
for "sur_refl_b01_f", or
"500m Surface Reflectance Band 1 - additional layers, compact"
for "sur_refl_b01_c".
===========================================================================
Name Data Dimensions
Type
suf_refl_b02_1 INT16 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
suf_refl_b02_f INT16 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
suf_refl_b02_c INT16 "TotalAdditionalObservations500m"
metadata value
Description:
MODIS Land Surface Reflectance for Band 2.
"suf_refl_b02_1" is for storing the first layer of observations
and is always stored.
"sur_refl_b02_f" and "sur_refl_b02_c" are for storing the
additional layers of observations. "suf_refl_b02_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"suf_refl_b02_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 60 Variable
units STRING 11 "reflectance"
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28672
add_offset FLOAT64 1 0.0
add_offset_err FLOAT64 1 0.0
calibrated_nt INT32 1 5
scale_factor FLOAT64 1 10000.0
scale_factor_err FLOAT64 1 0.0
Nadir Data Resolution
STRING 4 "500m"
Note: The attribute "long_name" is
"500m Surface Reflectance Band 2 - first layer" for "sur_refl_b02_1",
"500m Surface Reflectance Band 2 - additional layers, full"
for "sur_refl_b02_f", or
"500m Surface Reflectance Band 2 - additional layers, compact"
for "sur_refl_b02_c".
===========================================================================
Name Data Dimensions
Type
suf_refl_b03_1 INT16 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
suf_refl_b03_f INT16 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
suf_refl_b03_c INT16 "TotalAdditionalObservations500m"
metadata value
Description:
MODIS Land Surface Reflectance for Band 3.
"suf_refl_b03_1" is for storing the first layer of observations
and is always stored.
"sur_refl_b03_f" and "sur_refl_b03_c" are for storing the
additional layers of observations. "suf_refl_b03_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"suf_refl_b03_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 60 Variable
units STRING 11 "reflectance"
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28672
add_offset FLOAT64 1 0.0
add_offset_err FLOAT64 1 0.0
calibrated_nt INT32 1 5
scale_factor FLOAT64 1 10000.0
scale_factor_err FLOAT64 1 0.0
Nadir Data Resolution
STRING 4 "500m"
Note: The attribute "long_name" is
"500m Surface Reflectance Band 3 - first layer" for "sur_refl_b03_1",
"500m Surface Reflectance Band 3 - additional layers, full"
for "sur_refl_b03_f", or
"500m Surface Reflectance Band 3 - additional layers, compact"
for "sur_refl_b03_c".
===========================================================================
Name Data Dimensions
Type
suf_refl_b04_1 INT16 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
suf_refl_b04_f INT16 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
suf_refl_b04_c INT16 "TotalAdditionalObservations500m"
metadata value
Description:
MODIS Land Surface Reflectance for Band 4.
"suf_refl_b04_1" is for storing the first layer of observations
and is always stored.
"sur_refl_b04_f" and "sur_refl_b04_c" are for storing the
additional layers of observations. "suf_refl_b04_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"suf_refl_b04_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 60 Variable
units STRING 11 "reflectance"
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28672
add_offset FLOAT64 1 0.0
add_offset_err FLOAT64 1 0.0
calibrated_nt INT32 1 5
scale_factor FLOAT64 1 10000.0
scale_factor_err FLOAT64 1 0.0
Nadir Data Resolution
STRING 4 "500m"
Note: The attribute "long_name" is
"500m Surface Reflectance Band 4 - first layer" for "sur_refl_b04_1",
"500m Surface Reflectance Band 4 - additional layers, full"
for "sur_refl_b04_f", or
"500m Surface Reflectance Band 4 - additional layers, compact"
for "sur_refl_b04_c".
===========================================================================
Name Data Dimensions
Type
suf_refl_b05_1 INT16 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
suf_refl_b05_f INT16 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
suf_refl_b05_c INT16 "TotalAdditionalObservations500m"
metadata value
Description:
MODIS Land Surface Reflectance for Band 5.
"suf_refl_b05_1" is for storing the first layer of observations
and is always stored.
"sur_refl_b05_f" and "sur_refl_b05_c" are for storing the
additional layers of observations. "suf_refl_b05_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"suf_refl_b05_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 60 Variable
units STRING 11 "reflectance"
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28672
add_offset FLOAT64 1 0.0
add_offset_err FLOAT64 1 0.0
calibrated_nt INT32 1 5
scale_factor FLOAT64 1 10000.0
scale_factor_err FLOAT64 1 0.0
Nadir Data Resolution
STRING 4 "500m"
Note: The attribute "long_name" is
"500m Surface Reflectance Band 5 - first layer" for "sur_refl_b05_1",
"500m Surface Reflectance Band 5 - additional layers, full"
for "sur_refl_b05_f", or
"500m Surface Reflectance Band 5 - additional layers, compact"
for "sur_refl_b05_c".
===========================================================================
Name Data Dimensions
Type
suf_refl_b06_1 INT16 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
suf_refl_b06_f INT16 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
suf_refl_b06_c INT16 "TotalAdditionalObservations500m"
metadata value
Description:
MODIS Land Surface Reflectance for Band 6.
"suf_refl_b06_1" is for storing the first layer of observations
and is always stored.
"sur_refl_b06_f" and "sur_refl_b06_c" are for storing the
additional layers of observations. "suf_refl_b06_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"suf_refl_b06_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 60 Variable
units STRING 11 "reflectance"
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28672
add_offset FLOAT64 1 0.0
add_offset_err FLOAT64 1 0.0
calibrated_nt INT32 1 5
scale_factor FLOAT64 1 10000.0
scale_factor_err FLOAT64 1 0.0
Nadir Data Resolution
STRING 4 "500m"
Note: The attribute "long_name" is
"500m Surface Reflectance Band 6 - first layer" for "sur_refl_b06_1",
"500m Surface Reflectance Band 6 - additional layers, full"
for "sur_refl_b06_f", or
"500m Surface Reflectance Band 6 - additional layers, compact"
for "sur_refl_b06_c".
===========================================================================
Name Data Dimensions
Type
suf_refl_b07_1 INT16 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
suf_refl_b07_f INT16 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
suf_refl_b07_c INT16 "TotalAdditionalObservations500m"
metadata value
Description:
MODIS Land Surface Reflectance for Band 7.
"suf_refl_b07_1" is for storing the first layer of observations
and is always stored.
"sur_refl_b07_f" and "sur_refl_b07_c" are for storing the
additional layers of observations. "suf_refl_b07_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"suf_refl_b07_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 60 Variable
units STRING 11 "reflectance"
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28672
add_offset FLOAT64 1 0.0
add_offset_err FLOAT64 1 0.0
calibrated_nt INT32 1 5
scale_factor FLOAT64 1 10000.0
scale_factor_err FLOAT64 1 0.0
Nadir Data Resolution
STRING 4 "500m"
Note: The attribute "long_name" is
"500m Surface Reflectance Band 7 - first layer" for "sur_refl_b07_1",
"500m Surface Reflectance Band 7 - additional layers, full"
for "sur_refl_b07_f", or
"500m Surface Reflectance Band 7 - additional layers, compact"
for "sur_refl_b07_c".
===========================================================================
Name Data Dimensions
Type
QC_500m_1 UINT32 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
QC_500m_f UINT32 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
QC_500m_c UINT32 "TotalAdditionalObservations500m"
metadata value
Description:
MODIS Land Surface Reflectance 500m Quality Assurance.
Note: Bits are listed from the MSB (bit 31) to the LSB (bit 0).
Bit(s) Description
31 adjacency correction performed; yes(1) or no (0)
30 atmospheric correction performed; yes (1) or no (0)
26-29 band 7 data quality, four bit range;
0000 ( 0) -- highest quality
1000 ( 8) -- dead detector; data interpolated in L1B
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) -- correction out of bounds, pixel constrained to
extreme allowable value
1110 (14) -- L1B data faulty
1111 (15) -- not processed due to deep ocean or clouds
22-25 band 6 data quality, four bit range;
(SAME AS ABOVE)
18-21 band 5 data quality, four bit range;
(SAME AS ABOVE)
14-17 band 4 data quality, four bit range;
(SAME AS ABOVE)
10-13 band 3 data quality, four bit range;
(SAME AS ABOVE)
6-9 band 2 data quality, four bit range;
(SAME AS ABOVE)
2-5 band 1 data quality four bit range;
(SAME AS ABOVE)
0-1 MODLAND QA bits;
corrected product produced:
00 -- ideal quality all bands,
01 -- less than ideal quality some or all bands;
corrected product not produced due to:
10 -- cloud effects all bands,
11 -- other reasons some or all bands may be fill value;
Note that a value of (11) overrides a value of (01)
"QC_500m_1" is for storing the first layer of observations
and is always stored.
"QC_500m_f" and "QC_500m_c" are for storing the
additional layers of observations. "QC_500m_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"QC_500m_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 59 Variable
units STRING 9 "bit field"
valid_range UINT32 2 0, 4294966019
_FillValue UINT32 1 787410671
Nadir Data Resolution
STRING 4 "500m"
QA index STRING 1800 Variable
Note: The attribute "long_name" is
"500m Reflectance Band Quality - first layer" for "QC_500m_1",
"500m Reflectance Band Quality - additional layers, full"
for "QC_500m_f", or
"500m Reflectance Band Quality - additional layers, compact"
for "QC_500m_c".
==========================================================================
Name Data Dimensions
Type
obscov_1 INT8 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
obscov_f INT8 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
obscov_c INT8 "TotalAdditionalObservations500m"
metadata value
Description:
Observation coverage is an estimate of the amount of intersection
between observation footprint and grid cell.
"obscov_1" is for storing the first layer of observations
and is always stored.
"obscov_f" and "obscov_c" are for storing the
additional layers of observations. "obscov_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"obscov_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 49 Variable
units STRING 7 "percent"
valid_range INT8 2 0, 100
_FillValue INT8 1 -1
add_offset FLOAT64 1 0.0
add_offset_err FLOAT64 1 0.0
calibrated_nt INT32 1 5
scale_factor FLOAT64 1 0.01
scale_factor_err FLOAT64 1 0.0
Note: The attribute "long_name" is
"Observation coverage - first layer" for "obscov_1",
"Observation coverage - additional layers, full" for "obscov_f", or
"Observation coverage - additional layers, compact" for "obscov_c".
===========================================================================
Name Data Dimensions
Type
iobs_res_1 UINT8 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
iobs_res_f UINT8 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
iobs_res_c UINT8 "TotalAdditionalObservations500m"
metadata value
Description:
Layer number of corresponding observation in the 1km resolution grid.
Zero relative.
"iobs_res_1" is for storing the first layer of observations
and is always stored.
"iobs_res_f" and "iobs_res_c" are for storing the
additional layers of observations. "iobs_res_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"iobs_res_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 63 Variable
units STRING 7 "none"
valid_range UINT8 2 0, 254
_FillValue UINT8 1 255
Note: The attribute "long_name" is
"observation number in coarser grid - first layer" for "iobs_res_1",
"observation number in coarser grid - additional layers, full"
for "iobs_res_f", or
"observation number in coarser grid - additional layers, compact"
for "iobs_res_c".
===========================================================================
Name Data Dimensions
Type
q_scan_1 UINT8 "YDim:MODIS_Grid_500m_2D",
"XDim:MODIS_Grid_500m_2D"
q_scan_f UINT8 "Additional Layers:MODIS_Grid_500m_3D",
"YDim:MODIS_Grid_500m_3D",
"XDim:MODIS_Grid_500m_3D"
q_scan_c UINT8 "TotalAdditionalObservations500m"
metadata value
Description:
The 250m scan value information states whether the corresponding
250m observations from the same orbit are available for the 500m
observation, and also states whether the 250m observations are from
the same or a different scan.
The 250m samples are for each of four quadrents:
0 -- first 250m line (row), first 250m sample (column);
1 -- first 250m line, second 250m sample;
2 -- second 250m line, first 250m sample;
3 -- second 250m line, second 250m sample.
The first line/sample is in the upper left (north-west) corner of the
image.
Note: Bits are numbered from left (MSB) to right (LSB).
Bit(s) Description
0 missing observation in quadrent 4 [+0.5 row, +0.5 column];
yes (1) or no (0)
1 missing observation in quadrent 3 [+0.5 row, -0.5 column];
yes (1) or no (0)
2 missing observation in quadrent 2 [-0.5 row, +0.5 column];
yes (1) or no (0)
3 missing observation in quadrent 1 [-0.5 row, -0.5 column];
yes (1) or no (0)
4 scan of observation in quadrent 4 [+0.5 row, +0.5 column];
same (1) or different (0)
5 scan of observation in quadrent 3 [+0.5 row, -0.5 column];
same (1) or different (0)
6 scan of observation in quadrent 2 [-0.5 row, +0.5 column];
same (1) or different (0)
7 scan of observation in quadrent 1 [-0.5 row, -0.5 column];
same (1) or different (0)
"q_scan_1" is for storing the first layer of observations
and is always stored.
"q_scan_f" and "q_scan_c" are for storing the
additional layers of observations. "q_scan_f" is for the
full format and is stored only if "L2GStorageFormat500m" is "full".
"q_scan_c" is for the compact format and is stored only if
"L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 56 Variable
units STRING 7 "none"
valid_range UINT8 2 0, 254
_FillValue UINT8 1 255
Note: The attribute "long_name" is
"250m scan value information - first layer" for "q_scan_1",
"250m scan value information - additional layers, full"
for "q_scan_f", or
"250m scan value information - additional layers, compact"
for "q_scan_c".
===========================================================================
Name Data Dimensions
Type
nadd_obs_row_500m INT32 "DataRows500m" metadata value
Description:
The number of additional observations in each row in the
compact storage form of the L2G grid.
This field is only stored if "L2GStorageFormat500m" is "compact".
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 41 "Number of additional observations
per row"
units STRING 4 "none"
valid_range INT32 2 0, INT32_MAX
_FillValue INT32 1 -1
=========================================================================