Equatorial Vortex Experiment

The Equatorial Vortex Experiment (EVEX) is a NASA-funded sounding rocket mission to better understand and predict the electrical storms in Earth's upper atmosphere.

A NASA Terrier Oriole sounding rocket was launched at 3:39 a.m. EDT on 7 May 2013 from Roi Namur, Republic of the Marshall Islands.

Payload for each rocket included two canisters of samarium and a dual frequency RF Beacon (NRL CERTO).

[3] In June 2017, a Terrier-Improved Malemute two-stage sounding rocket was launched from NASA's Wallops Flight Facility in Virginia.

The artificial clouds released by this rocket helped scientists track the movement of Earth's ionosphere.