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Firefly



The small satellite, with a big mission, is appropriately named "Firefly." Sponsored by the National Science Foundation (NSF), the pint-sized satellite will study the most powerful natural particle accelerator on Earth, lightning, when it launches from the Marshall Islands aboard an Air Force Falcon 1E rocket vehicle next year. In particular, Firefly will focus on Terrestrial Gamma-ray Flashes (TGFs), a little understood phenomenon first discovered by NASA's Compton Gamma-Ray Observatory in the early 1990s.

Although no one knows why, it appears these flashes of gamma rays that were once thought to occur only far out in space near black holes or other high-energy cosmic phenomena are somehow linked to lightning.

Using measurements gathered by Firefly's instruments, Goddard scientist Doug Rowland and his collaborators, Universities Space Research Association in Columbia, Md., Siena College, located near Albany, N.Y., and the Hawk Institute for Space Studies in Pocomoke City, Md., hope to answer what causes these high-energy flashes. In particular, they want to find out if lightning triggers them or if they trigger lightning. Could they be responsible for some of the high-energy particles in the Van Allen radiation belts, which damage satellites? Firefly is expected to observe up to 50 lightning strokes per day, and about one large TGF every couple days.

Animations

link to gallery item Firefly Beauty Pass
Firefly Beauty Pass
link to gallery item Firefly Deployment
Firefly Deployment
link to gallery item Firefly in Orbit
Firefly in Orbit
link to gallery item Radiation in Electric Fields Over Thunderstorms
Radiation in Electric Fields Over Thunderstorms
link to gallery item Electrons Populate the Radiation Belts
Electrons Populate the Radiation Belts

Edited Features

link to gallery item Firefly Teaser
Firefly Teaser


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