Solar flare alerts help research rockets catch brief observing windows
A newly published study describes how satellite-based alerts helped launch teams target an ongoing solar flare with research rockets. The system combines a flare’s location with an estimate of its remaining duration, matching a short flight to a fleeting target. Its operational demonstration took place in Alaska in 2024, with an enhanced version supporting another flight in May.
Science··Evening
Alerts connect flare duration with launch decisions
A real-time solar-flare alert system has helped teams choose when to launch research rockets. A peer-reviewed paper published on 4 November in The Astrophysical Journal describes the system developed by Juliana T. Vievering and colleagues. Sounding rockets carry instruments above the atmosphere to observe radiation absorbed below, but have only a few minutes for measurements. A flare must last long enough for the instruments to arrive and point at it.[1]
Satellite measurements guide a short countdown
The tools combine prompt satellite measurements to detect a flare’s onset, locate it and estimate its remaining lifetime. X-ray observations from US weather satellites help inform the countdown. NASA’s Solar Dynamics Observatory, a spacecraft studying the Sun, supplies observations of hot plasma and changing radiation. Automated alerts complement visual checks, with the launch decision resting with teams using several streams of information.[1]
Alaska flights supplied an operational test
The system supported two solar-observing rocket flights from Poker Flat, a launch range near Fairbanks in Alaska, United States, on 17 April 2024. Teams paused and restarted countdowns as measurements changed, then observed a flare during its decay. NASA says an enhanced version also helped another flight observe three small flares on 14 May. Data delays, interruptions and mission-specific alert criteria remain practical constraints on operating the system.[1]
