MOD14A1 v006

MODIS/Terra Thermal Anomalies/Fire Daily L3 Global 1 km SIN Grid

PI: Louis Giglio


The Terra Moderate Resolution Imaging Spectroradiometer (MODIS) Thermal Anomalies and Fire Daily (MOD14A1) Version 6 data are generated every eight days at 1 kilometer (km) spatial resolultion as a Level 3 product. MOD14A1 contains eight consecutive days of fire data conveniently packaged into a single file.

The Science Dataset (SDS) layers include the fire mask, pixel quality indicators, maximum fire radiative power (MaxFRP), and the position of the fire pixel within the scan. Each layer consists of daily per pixel information for each of the eight days of data acquisition.

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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


Characteristic Description
CollectionTerra MODIS
File Size0.6 MB
Temporal ResolutionDaily
Temporal Extent2000-02-18 to Present
Spatial ExtentGlobal
Coordinate SystemSinusoidal
File FormatHDF-EOS
Geographic Dimensions1200 km x 1200 km


Characteristic Description
Number of Science Dataset (SDS) Layers4
Columns/Rows1200 x 1200
Pixel Size1000 m


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
MaxFRP Maximum Fire Radiative Power Megawatts 32-bit unsigned integer 0 N/A 0 to 180000 0.1
Sample Position of fire pixel within scan Number 16-bit unsigned integer N/A N/A 0 to 1353 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 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.

The Quality Assessment (QA) bit flags for the quality layer are provided in Table 6 on page 24 of the User Guide.

Known Issues

For complete information about the MOD14A1 known issues please refer to the MODIS Land Quality Assessment website.


Using the Data

Access Data


DOI: 10.5067/MODIS/MOD14A1.006

About the Image

Terra MODIS fire data from the MOD14A1 product over the western United States, August 13, 2018.

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