MOD14A2 v006

MODIS/Terra Thermal Anomalies/Fire 8-Day L3 Global 1 km SIN Grid


PI: Louis Giglio

Description

The Terra Moderate Resolution Imaging Spectroradiometer (MODIS) Thermal Anomalies and Fire 8-Day (MOD14A2) Version 6 data are generated at 1 kilometer (km) spatial resolultion as a Level 3 product. The MOD14A2 gridded composite contains the maximum value of the individual fire pixel classes detected during the eight days of acquisition.

The Science Dataset (SDS) layers include the fire mask and pixel quality indicators.

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Characteristics

Improvements/Changes from Previous Versions

  • Refinements to internal cloud mask, which sometimes flags heavy smoke as clouds.
  • Fix for frequent false alarms occurring in the Amazon that are caused by small (~1 km²) clearings within forests.
  • Fix to correct a bug that causes incorrect assessment of cloud and water pixels adjacent to fire pixels near the scan edge.
  • Detect small fires using dynamic thresholding.
  • Process ocean and coastline pixels to detect fire from oil rigs.
  • The Version 6 fire mask has the potential to detect fire over water pixels. Therefore, class 3 pixel values have been changed to be classified as “non-fire water pixels”.

Product Maturity

Validation at stage 3 has been achieved for all MODIS Thermal Anomalies and Fire products. Further details regarding MODIS land product validation for the MOD14 data products are available from the MODIS land team validation site.

Collection and Granule

Collection

Characteristic Description
CollectionTerra MODIS
DOI10.5067/MODIS/MOD14A2.006
File Size~0.4 MB
Temporal ResolutionMulti-Day
Temporal Extent2000-02-18 to Present
Spatial ExtentGlobal
Coordinate SystemSinusoidal
DatumN/A
File FormatHDF-EOS
Geographic Dimensions1200 km x 1200 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers2
Columns/Rows1200 x 1200
Pixel Size1000 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
FireMask Confidence of fire Class Flag 8-bit unsigned integer 0 N/A 1 to 9 N/A
QA Pixel quality indicators Bit Field 8-bit unsigned integer N/A N/A 0 to 6 N/A

MOD14 Fire Mask Pixel Classes

Value Description
0 Not processed (missing input data)
1 Not processed (obsolete; not used since Collection 1)
2 Not processed (other reason)
3 Non-fire water pixel
4 Cloud (land or water)
5 Non-fire land pixel
6 Unknown (land or water)
7 Fire (low confidence, land or water)
8 Fire (nominal confidence, land or water)
9 Fire (high confidence, land or water)

Product Quality

The Quality Assurance (QA) layer is stored in an efficient bit-encoded manner. The unpack_sds_bits executable from the LDOPE Tools is available to the user community to help parse and interpret the quality layer.

In addition to data access and transformation processes, AppEEARS also has the capability to unpack and interpret the quality layer.

The bit flags for the QA layer are provided in Table 6 on page 24 of the User Guide.

Known Issues

For complete information about the MOD14A2 known issues please refer to the MODIS Land Quality Assessment website.

Documentation

Using the Data

E-Learning

Working with Land Remote Sensing Data in a GIS Environment

Getting Started with MODIS Version 6 Thermal Anomalies and Fire Data Part 1: All About Accessing the Data.

Getting Started with MODIS Version 6 Thermal Anomalies and Fire Data Part 2: Using the Data

Getting Started with MODIS Version 6 Thermal Anomalies and Fire Data Part 3: Interpreting Quality Information

Observing Land from Space: Interacting with Geospatial Data from NASA's LP DAAC

An Introduction to the NASA AppEEARS Area Sampler

Tools

Citation

DOI: 10.5067/MODIS/MOD14A2.006

About the Image

Terra MODIS fire data from the MOD14A2 product over the western United States, Aug 13 - 20, 2018.

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