CCAPP Postdoc Eric Grashorn and colleagues noted radio waves detected by ANITA, that were initially dismissed as noise, actually had a similar pattern in their distribution of frequencies.

Image: Locations of direct (black) and reflected (red) detection of ultrahigh energy cosmic ray events by the ANITA balloon experiment over Antarctica. The field of view is delineated by the dashed blue line.

Read the NewScientist Article:
Giant Antarctic Balloon Sees Surprise Cosmic Rays

Read the Journal Article:
Observation of Ultrahigh-Energy Cosmic Rays with the ANITA Balloon-Borne Radio Interferometer