
The Defense Advanced Research Projects Agency (DARPA) awarded Spire Global a contract to design a satellite to carry sensors to measure the ionosphere. The contract is part of DARPA’s Ouija program that aims to use sensors on low-orbiting satellites to monitor high frequency radio wave propagation in the ionosphere. DARPA announced the Ouija program in April 2022. Its goal is to quantify the space HF noise environment, which is currently measured with ground-based measures. DARPA said that improved characterization of the ionosphere can support warfighter…