"Its purpose would be to fly over enemy territory, provide data to allied forces and even jam or disrupt enemy capability.

The system is dubbed High-Altitude Extended-Range Long Endurance Intelligence Observation System, or HELEIOS (not to be confused with the HELIOS laser) and is part of the US Army’s wider Multidomain Sensing System family."

https://southfront.org/us-high-altitude-spy-and-jamming-sensor/