Slide Title: Observing Cosmic Ray Air Showers

Slide Image: Here is a cartoon of a shower with the two methods of detection. The fluorescence detector -- sometimes called a fly's eye -- records the fluorescence light produced in the atmosphere as the shower cascades toward the earth. The surface detector is an array of particle detectors that records some of the billions of shower particles that hit the earth.

Image Source: Paul Mantsch

Slide Words:
Air shower measurements are made by two techniques
1) Surface Arrays
2) Fluorescence Telescopes (Fly's Eyes)

Slide Source: NSF and Paul Mantsch