NASA Fire/Hotspot Data

FIRMS recently integrated ultra real-time (URT) MODIS and VIIRS active fire data, within a minute of satellite observation, from multiple direct readout ground stations in the continental US (CONUS).

This data is based on a one-week period as of the upload date and has been submitted for analysis in forest fire research.

It includes:

• MODIS (MODIS Active Fire and Thermal Anomalies)
• VIIRS 375m data from NOAA-20 (VIIRS Active Fire and Thermal Anomalie)
• VIIRS 375m data from S-NPP (VIIRS Active Fire and Thermal Anomalie)

Attributes

Latitude:
Center of 1 km fire pixel, but not necessarily the actual location of the fire as one or more fires can be detected within the 1 km pixel.

Longitude:
Center of 1 km fire pixel, but not necessarily the actual location of the fire as one or more fires can be detected within the 1 km 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 1 km 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 1 km fire pixels, but MODIS pixels get bigger toward the edge of scan. Scan and track reflect actual pixel size.

Acq_Date[Acquisition Date]:
Data of MODIS acquisition.

Acq_Time[Acquisition Time]:
Time of acquisition/overpass of the satellite (in UTC).

Satellite:

• A = Aqua
• T = Terra

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).

Bright_T31[Brightness temperature 31 (Kelvin)]:
Channel 31 brightness temperature of the fire pixel measured in Kelvin.

FRP[Fire Radiative Power (MW - megawatts)]:
Depicts the pixel-integrated fire radiative power in MW (megawatts).

Type[Inferred hot spot type]:

• 0 = presumed vegetation fire
• 1 = active volcano
• 2 = other static land source
• 3 = offshore

DayNight:

• D= Daytime fire
• N= Nighttime fire