MOD29P1N Product File Specification
Version: V6.0.0
Revision: 0
Date: 5 Nobember 2004
ESDT: MOD29P1N
Name: Daily Gridded Sea Ice Cover
Level: 3
Process ID: MOD_PR29A1
Point of Contact: George Riggs
SSAI
NASA, GSFC, Code 971
Greenbelt, MD 20771
301-614-5650
George.A.Riggs.1@gsfc.nasa.gov
Principal Investigator: Vincent V. Salomonson
NASA, GSFC, Code 900
Greenbelt, MD 20771
301-614-5631
Vincent.V.Salomonson@nasa.gov
Associate Investigator: Dorothy K. Hall
NASA, GSFC, Code 971
Greenbelt, MD 20771
301-614-5771
Dorothy.K.Hall@nasa.gov
Description:
This specification description of the MOD29P1N night gridded sea ice
product serves as a guide to the contents of the data product. A
listing of the ECS metadata and global attributes is given.
Descriptions of the SDS structures are given along with a listing of
the local attributes and brief description of the content of the SDS.
The sea ice product is archived in HDF-EOS format and consists of six
global metadata strings and two SDSs with local attributes. Map
projection currently supported is Lambert Azimuthal Equal Area
centered on either the North Pole or South Pole.
Spatial resolution of the data product is 1 km.
(A separate day product is produced.)
This night sea ice product is generated from MOD29PGN, the L2G sea ice
data product. A scoring algorithm based on solar zenith, distance
from nadir and observation coverage in a cell is used to select the
most favorable observation of the day. The QA corresponding to the
observation selected is also written in the data product. QA data is
based on temperature data unless otherwise noted.
Contents:
SDSs in the product:
Ice_Surface_Temperature
Ice_Surface_Temperature_Spatial_QA
Global Metadata names:
HDFEOSVersion
StructMetadata.0
MOD29InputGranuleNames
SCF Algorithm Version
CoreMetadata.0
ArchiveMetadata.0
*Start Global Attributes ===================================================
Name: Type: Num_Val: Source: Example value:
CoreMetadata.0 PVL-STRING
1 TK Variable
LocalGranuleID STRING 1 PGE Variable
SizeMBECSDataGranule DOUBLE 1 DSS Variable
ProductionDateTime DATETIME1 TK Variable
DayNightFlag STRING 1 PGE Variable
ReprocessingActual STRING 1 PGE "reprocessed"
LocalVersionID STRING 1 PGE "SCF 5.0.0"
ReprocessingPlanned STRING 1 PGE "further
update is anticipated"
ScienceQualityFlag STRING 1 DP Variable
AutomaticQualityFlagExplanation
STRING 1 PGE Variable
AutomaticQualityFlag STRING 1 PGE Variable
OperationalQualityFlagExplanation
STRING 1 PGE Variable
OperationalQualityFlag STRING 1 PGE Variable
ScienceQualityFlagExplanation
STRING 1 DP Variable
QAPercentMissingData INTEGER 1 PGE 0 - 100
QAPercentCloudCover INTEGER 1 PGE 0 - 100
ParameterName STRING M PGE "Ice_Surface_Temperature"
EquatorCrossingDate DATE M PGE Variable
EquatorCrossingTime TIME M PGE Variable
OrbitNumber INTEGER M PGE Variable
EquatorCrossingLongitude
DOUBLE M PGE Variable
VersionID INTEGER 1 MCF 6
ShortName STRING 1 MCF "MOD29P1N"
InputPointer STRING 3 PGE Variable
GRingPointLongitude DOUBLE 4 PGE Variable
GRingPointLatitude DOUBLE 4 PGE Variable
GRingPointSequenceNo INTEGER 4 PGE Variable
ExclusionGRingFlag STRING 1 PGE "N"
RangeEndingDate DATE 1 PGE Variable
RangeEndingTime TIME 1 PGE Variable
RangeBeginningDate DATE 1 PGE Variable
RangeBeginningTime TIME 1 PGE Variable
PGEVersion STRING 1 PGE Variable
AssociatedSensorShortName
STRING 1 MCF "MODIS"
AssociatedPlatformShortName
STRING 1 MCF "Terra"
AssociatedInstrumentShortName
STRING 1 MCF "MODIS"
**Product Specific Attibutues (PSA)**
AdditionalAttributeName.1 STRING 1 PGE QAPERCENTGOODQUALITY
ParameterValue.1 INTEGER 1 PGE 0 - 100
AdditionalAttributeName.2 STRING 1 PGE QAPERCENTOTHERQUALITY
ParameterValue.2 INTEGER 1 PGE 0 - 100
AdditionalAttributeName.3 STRING 1 PGE HORIZONTALTILENUMBER
ParameterValue.3 INTEGER 1 PGE Variable
AdditionalAttributeName.4 STRING 1 PGE VERTICALTILENUMBER
ParameterValue.4 INTEGER 1 PGE Variable
AdditionalAttributeName.5 STRING 1 PGE TILEID
ParameterValue.5 INTEGER 1 PGE Variable
AdditionalAttributeName.6 STRING 1 PGE SEAICEPERCENT
ParameterValue.6 INTEGER 1 PGE 0 - 100
**end PSAs**
End CoreMetadata.0 _________________________________
Name: Type: Num_Val:Source: Value:
ArchiveMetadata.0 PVL-STRING 1 TK
CharacteristicBinAngularSize DOUBLE 1 PGE Variable
CharacteristicBinSize DOUBLE 1 PGE Variable
GeoAnyAbnormal STRING 1 PGE Variable
GeoEstMaxRMSError DOUBLE 1 PGE Variable
DataColumns INTEGER 1 PGE Variable
DataRows INTEGER 1 PGE Variable
GlobalGridColumns INTEGER 1 PGE Variable
GlobalGridRows INTEGER 1 PGE Variable
NumberOfOverlapGranules INTEGER 1 PGE Variable
NumberOfInputGranules INTEGER 1 PGE Variable
CoverageCalculationMethod STRING 1 PGE Variable
AlgorithmPackageAcceptanceDate STRING 1 PGE Variable
AlgorithmPackageMaturityCode STRING 1 PGE Variable
AlgorithmPackageName STRING 1 PGE Variable
AlgorithmPackageVersion STRING 1 PGE Variable
LongName STRING 1 MCF "MODIS/Terra
Sea Ice Extent Daily L3 Global 1km EASE-Grid Day"
InstrumentName STRING 1 MCF "Moderate
Resolution Imaging Spectroradiometer"
PlatformShortName STRING 1 MCF "Terra"
LocalInputGranuleID STRING 1 PGE Variable
ProcessingCenter STRING 1 MCF "MODAPS"
ProcessingDateTime DATETIME1 PGE Variable
SPSOParameters STRING 1 PGE "none"
NorthBoundingCoordinate DOUBLE 1 PGE Variable
SouthBoundingCoordinate DOUBLE 1 PGE Variable
EastBoundingCoordinate DOUBLE 1 PGE Variable
WestBoundingCoordinate DOUBLE 1 PGE Variable
ProcessingEnvironment STRING 1 PGE Variable
DescrRevision STRING 1 MCF Variable
End ArchiveMetadata.0 _________________________________
StructMetadata.0 DFNT_CHAR8 32000
GROUP=SwathStructure
END_GROUP=SwathStructure
GROUP=GridStructure
GROUP=GRID_1
GridName="MOD_Grid_Seaice_1km"
XDim=951
YDim=951
UpperLeftPointMtrs=(-1430352.976500,2383921.627500)
LowerRightMtrs=(-476784.325500,1430352.976500)
Projection=GCTP_LAMAZ
ProjParams=(6371228,0,0,0,0,-90000000,0,0,0,0,0,0,0)
SphereCode=-1
GridOrigin=HDFE_GD_UL
GROUP=Dimension
END_GROUP=Dimension
GROUP=DataField
OBJECT=DataField_1
DataFieldName="Ice_Surface_Temperature"
DataType=DFNT_UINT16
DimList=("YDim","XDim")
CompressionType=HDFE_COMP_DEFLATE
DeflateLevel=9
END_OBJECT=DataField_1
OBJECT=DataField_2
DataFieldName="Ice_Surface_Temperature_Spatial_QA"
DataType=DFNT_UINT8
DimList=("YDim","XDim")
CompressionType=HDFE_COMP_DEFLATE
DeflateLevel=9
END_OBJECT=DataField_2
END_GROUP=DataField
GROUP=MergedFields
END_GROUP=MergedFields
END_GROUP=GRID_1
END_GROUP=GridStructure
GROUP=PointStructure
END_GROUP=PointStructure
END
HDFEOSVersion DFNT_CHAR string length PGE Variable
MOD29InputGranuleNames DFNT_CHAR string length PGE Variable
SCF Algorithm Version DFNT_CHAR string length PGE Variable
*End Global Attributes
===============================================================================
SDS Definition
SDS Name: Ice_Surface_Temperature
Description: Ice surface temperature (K) as
determined from the "best" observations from the
L2G sea ice data product.
Number Type: "DFNT_UINT16"
Rank: 2
Dimension sizes: (YDim, XDim)
Dimension Names:
Dimension0: "YDim"
Dimension1: "XDim"
SDS Local Attributes:
Name: Type: Num_Val: Source: Value:
HDF Predefined Attributes
by Reserved Label name_____
long_name DFNT_CHAR string length PGE "Ice surface temperature for daily tile"
units DFNT_CHAR string length PGE "degree_Kelvin"
format DFNT_CHAR string length PGE "F4.1"
coordsys DFNT_CHAR string length PGE "cartesian"
valid_range DFNT_UINT16 2 PGE 21000 - 31320
_FillValue DFNT_UNIT16 1 PGE 7
scale_factor DFNT_FLOAT64 1 PGE 0.01
scale_factor_err DFNT_FLOAT64 1 PGE 0.0
add_offset DFNT_FLOAT64 1 PGE 0.0
add_offset_err DFNT_FLOAT64 1 PGE 0.0
calibrated_nt DFNT_INT32 1 PGE 23
Custom Attributes_____
Key DFNT_CHAR string length PGE "0.0=missing, 1.0=no decision, 11.0=night,25.0=land, 37.0=inland water, 39.0=open ocean, 50.0=cloud, 243.0-273.0 expected IST range, 655.35=fill"
===============================================================================
SDS Definition
SDS Name: Ice_Surface_Temperature_Spatial_QA
Description: QA data corresponding to the sea ice temperature
observation selected for the day.
Number Type: "DFNT-UINT8"
Rank: 2
Dimension sizes: (YDim, XDim)
Dimension Names:
Dimension0: "YDim"
Dimension1: "XDim"
SDS Local Attributes:
Name: Type: Num_Val: Source: Value:
HDF Predefined Attributes
by Reserved Label name_____
long_name DFNT_CHAR string length PGE "Ice surface temperature spatial QA for daily tile"
units DFNT_CHAR string length PGE "none"
format DFNT_CHAR string length PGE "I3"
coordsys DFNT_CHAR string length PGE "cartesian"
valid_range DFNT_UINT8 2 PGE 0, 255
_FillValue DFNT_UNIT8 1 PGE 255
Custom Attributes_____
Key DFNT_CHAR string length PGE "0=good quality, 1=other quality, 253=land mask, 254=ocean mask, 255=fill"
===============================================================================