MODIS Thermal Anomalies/Fire Version 6 File Specification
Document Creation: 08.02.2013
PGE Version : 6.0.1
PGE Release : 08.??.2013
This document specifies the format for the Terra MODIS Level 3 Thermal
Anomalies/Fire 8-Day Global 1km SIN Grid product (MOD14A2).
Point of Contact:
Louis Giglio (PI)
University of Maryland
NASA Goddard Space Flight Center, Code 606.3
Greenbelt, MD 20771
lgiglio@umd.edu
(301) 405-0064
Chris Justice
University of Maryland
cjustice@umd.edu
1. ECS Granule Metadata
1.1 CoreMetadata.0
ECS Core metadata are stored in a single HDF attribute as a large string of
PVL text.
Name ECS Type
---- --------
LocalGranuleID string
SizeMBECSDataGranule double
ProductionDateTime DATETIME
DayNightFlag string
ReprocessingActual string
ReprocessingPlanned string
LocalVersionID string
ScienceQualityFlag string
AutomaticQualityFlagExplanation string
AutomaticQualityFlag string
OperationalQualityFlagExplanation string
OperationalQualityFlag string
ScienceQualityFlagExplanation string
QAPercentMissingData integer
QAPERCENTOUTOFBOUNDSDATA integer
QAPERCENTINTERPOLATEDDATA integer
EquatorCrossingDate DATE
EquatorCrossingTime TIME
OrbitNumber integer
EquatorCrossingLongitude double
VersionID integer
ShortName string
GRingPointLongitude double
GRingPointLatitude double
GRingPointSequenceNo integer
ExclusionGRingFlag string
RangeEndingDate DATE
RangeEndingTime TIME
RangeBeginningDate DATE
RangeBeginningTime TIME
InputGranule string
InputPointer string
PGEVersion string
AncillaryInputPointer string
AncillaryInputType string
AssociatedSensorShortName string
AssociatedPlatformShortName string
AssociatedInstrumentShortName string
The following will be the AdditionalAttributes set:
AdditionalAttribute.1 = QAPERCENTGOODQUALITY (integer)
AdditionalAttribute.2 = QAPERCENTOTHERQUALITY (integer)
AdditionalAttribute.3 = HORIZONTALTILENUMBER (integer)
AdditionalAttribute.4 = VERTICALTILENUMBER (integer)
AdditionalAttribute.5 = TileID (integer)
1.2 ArchiveMetadata.0
ECS Archive metadata are also stored in a single HDF attribute as a large
string of PVL text.
Name ECS Type
---- --------
AlgorithmPackageAcceptanceDate string
AlgorithmPackageMaturityCode string
AlgorithmPackageName string
AlgorithmPackageVersion string
GEOANYABNORMAL string
INSTRUMENTNAME string
SystemFileName string
AncillarySystemFileName string
LongName string
ProcessingCenter string
SPSOParameters string
NorthBoundingCoordinate double
SouthBoundingCoordinate double
EastBoundingCoordinate double
WestBoundingCoordinate double
CHARACTERISTICBINSIZE double
InstrumentScansProcessed integer
PercentLand integer
scistate integer
sciabnorm integer
CloudPixels integer
NoFirePixels integer
UnknownPixels integer
WaterPixels integer
DESCRrevision string
ProductionHistory string
ProcessingEnvironment string
2. Product-Specific Granule Metadata
The following fields are stored as individual HDF attributes. Many are
duplicates of the ECS Core and Archive metadata fields to prevent users from
having to parse metadata stored in the confusing PVL format mandated by the
ECS.
Name Type Description
---- ---- -----------
FirePix int32 Number of fire pixels detected in tile.
CloudPix int32 Number of cloud pixels over land in
tile.
UnknownPix int32 Number of pixels classified as "unknown"
in tile.
MissingPix int32 Number of pixels classified as "missing"
in tile.
MaxT21 float32 Maximum fire-pixel band 21 brightness
temperature (kelvins).
ProcessVersionNumber string Internal version number (e.g. "5.1.0").
StartDate string Start date of 8-day product period;
format is YYYY-MM-DD.
EndDate string End date of 8-day product period; format
is YYYY-MM-DD.
HorizontalTileNumber int16 Tile horizontal coordinate (range 0 - 35)
VerticalTileNumber int16 Tile vertical coordinate (range 0 - 17)
3. Structural Metadata
This string will be populated automatically by HDF-EOS.
Grid Structure: MODIS_Grid_Daily_Fire
Data Fields:
FireMask, QA
Dimensions:
Dimension Name Value
YDim:MODIS_Grid_Daily_Fire "Data Rows"
XDim:MODIS_Grid_Daily_Fire "Data Columns"
Corner Locations:
Corner Values
UpperLeftPointMtrs (Variable, Variable)
LowerRightPointMtrs (Variable, Variable)
Geographic Grid Projection Parameters:
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
4. Scientific Data Sets
Name Type Dimensions
----- ---- ----------
FireMask uint8 XDim, YDim
Description:
The FireMask SDS is an 8-day composite containing essentially the maximum value
of the individual Level 2 pixel classes that fell into each 1-km grid cell over
the 8-day compositing period.
Note: For Collection 5 and earlier, the FireMask SDS was _precisely_ a
maximum value composite of the Level 2 fire product pixel classes. For
Collection 6 this rule had to be modified slightly because of the potential
for fire pixels to be detected over water (i.e., offshore gas flares).
Consequently, non-fire water pixels (class 3) will now override
cloud pixels (class 4) occuring over water, just as non-fire land pixels
(class 5) have always been assigned higher priority than cloud pixels occuring
over land.
SDS Attributes:
Attribute Type Quantity Value
--------- ---- -------- --------
valid_range uint8 2 0, 9
_FillValue uint8 1 0
Value Description
----- -----------
0 missing input data
1 not processed (obsolete; not used in post-launch product)
2 not processed (other reason)
3 non-fire water
4 cloud
5 non-fire land
6 unknown
7 fire (low confidence)
8 fire (nominal confidence)
9 fire (high confidence)
-----------------------------------------------------------------------------
Name Type Dimensions
-------- ------- -----------------
QA uint8 XDim, YDim
Description:
The QA SDS is a 1200 by 1200 8-bit unsigned integer array. Only six unique QA
values are possible, with the meanings shown below:
Bit Description
--- -----------
0-1 land/water state
00 = water
01 = coast
10 = land
11 = missing data
2 day/night observation (0 = night, 1 = day)
For missing-data grid cells (bit pattern 11 in bits 0-1) bit 2 will always
be clear.
SDS Attributes:
Attribute Type Quantity Value
------------ ------- ------------ --------
valid_range uint8 2 0, 6
units string 9 bit field