Through the HFGeo Program, the Intelligence Advanced Research Projects Activity plans to figure out how to overcome ionospheric variations, high noise environments and ionospheric polarization that impacts quality of emitters.
IARPA falls within the Office of the Director of National Intelligence.
The agency also said multipath induced signal fading and simultaneous multiple angles-of-arrival make it difficult to accurately geolocate HF sources.
The HPGeo Program aims to provide the IARPA with new antenna concepts and multi-dimensional adaptive signal processing, according to the post.
IARPA also wants industry to help determine ionosphere states and integrate technologies into geolocation and characterization applications.
The Defense Advanced Research Projects Agency recently issued a call to industry for help in reusing old satellite parts in creating new satellite constellations.