Feedback
Science
Western Wildfires
photo

WorldView-3 Satellite Sees Wildfire Beneath the Smoke

Image: Happy Camp Complex fire
An infrared image captured by a sensor aboard DigitalGlobe's WorldView-3 satellite shows the extent of the Happy Camp Complex fire in California as of last week. Authorities said on Wednesday that the fire burned more than 70,000 acres and was 15 percent contained. This image is a false-color composite made from three of the eight shortwave infrared bands that coincidentally give an orange color to the fire. DigitalGlobe

DigitalGlobe promised that the shortwave infrared sensor on its WorldView-3 satellite could see through smoke to track wildfires, and one of its latest images has delivered on that pledge: The picture, captured from an altitude of 383 miles (617 kilometers) last week, reveals the burn line around the Happy Camp Complex fire in California's Klamath National Forest.

In the visible spectrum, WorldView-3 could see little more than the smoke rising from the blaze. But the color-coded view from three of the SWIR sensor's eight infrared bands shows exactly how far the fire had spread. An interactive slider image included in Digital Globe's blog post graphically demonstrates the difference.

Image: Heat map
A heat map of the Happy Camp Complex fire, based on infrared imagery from DigitalGlobe's WorldView-3 satellite, shows where the fire is most intense. DigitalGlobe

Because infrared imagery tracks heat, WorldView-3 was able to produce a "heat map" showing where the fire was burning the hottest. That kind of capability can guide firefighters as they battle wildfires.

The SWIR camera is just one of the things that makes WorldView-3 the world's most advanced commercial satellite for Earth imaging: The RV-sized spacecraft is also capable of snapping pictures with 1-foot (30-centimeter) pixel resolution — which is sharp enough to tell whether you've left your car door open. Its "super-spectral" images can track the biological health of forests and farms, or map the footprints of urban development.