1. What's New in Collection 6 MODIS Active Fire / Hotspot Data?

What's New in Collection 6 MODIS Active Fire / Hotspot Data?

Collection 6 represents the best available MODIS active fire / thermal anomalies product. Key changes, as they relate to the active fire / hotspots distributed by FIRMS are listed below. For the most up to date information, please refer to the MODIS Collection 6 Active Fire Product User's Guide Revision A.

  1. Processing has been extended to oceans and other large water bodies to detect offshore gas flaring.
  2. Reduced incidence of false alarms caused by small forest clearings.
  3. Improved detection of small fires.
  4. Expanded sun-glint rejection.
  5. Slightly improved cloud masking.
  6. Slight adjustment of detection confidence calculation.
  7. FRP retrieval now performed using Wooster et al. (2003) approach.
  8. DayNight field added to the attribute table
  9. Version field updated to a string field in the attribute table

Download Collection 6 MODIS Active Fire Data. Collection 6 will eventually replace collection 5 data but both collections will be produced in parallel for at six months to enable users to transition to the new product.

Please note:

  • The FIRMS Fire Email Alerts will be updated to distribute Collection 6 and VIIRS 375 m data.
  • For data older than the last 7 days, please use the Archive Download Tool.

Attribute fields for NRT MODIS C6 fire data distributed by FIRMS

Attribute Short Description Long Description
Latitude Latitude Center of 1km fire pixel but not necessarily the actual location of the fire as one or more fires can be detected within the 1km pixel.
Longitude Longitude Center of 1km fire pixel but not necessarily the actual location of the fire as one or more fires can be detected within the 1km pixel.
Brightness Brightness temperature 21 (Kelvin) Channel 21/22 brightness temperature of the fire pixel measured in Kelvin.
Scan Along Scan pixel size The algorithm produces 1km fire pixels but MODIS pixels get bigger toward the edge of scan. Scan and track reflect actual pixel size.
Track Along Track pixel size The algorithm produces 1km fire pixels but MODIS pixels get bigger toward the edge of scan. Scan and track reflect actual pixel size.
Acq_Date Acquisition Date Date of MODIS acquisition.
Acq_Time Acquisition Time Time of acquisition/overpass of the satellite (in UTC).
Satellite Satellite A = Aqua and T = Terra.
Confidence Confidence (0-100%) This value is based on a collection of intermediate algorithm quantities used in the detection process. It is intended to help users gauge the quality of individual hotspot/fire pixels. Confidence estimates range between 0 and 100% and are assigned one of the three fire classes (low-confidence fire, nominal-confidence fire, or high-confidence fire).
Version Version (Collection and source) Version identifies the collection (e.g. MODIS Collection 6) and source of data processing: Near Real-Time (NRT suffix added to collection) or Standard Processing (collection only).
"6.0NRT" - Collection 6 NRT processing.
"6.0" - Collection 6 Standard processing. Find out more on collections and on the differences between FIRMS data sourced from LANCE FIRMS and University of Maryland.
Bright_T31 Brightness temperature 31 (Kelvin) Channel 31 brightness temperature of the fire pixel measured in Kelvin.
FRP Fire Radiative Power Depicts the pixel-integrated fire radiative power in MW (megawatts).

DayNight Day / Night D = Daytime, N = Nighttime

Last Updated: Nov 8, 2016 at 3:57 PM EST

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