Low Earth Orbiting LUT

Overview
A Low Earth Orbiting LUT (LEOLUT') is a Local User Terminal (LUT) designed to track the low earth orbit search and rescue (LEOSAR) satellites as they pass across the sky and receive the distress signals relayed by them. The LEOLUT usually consists of a tracking-enabled antenna, a processor, and communications equipment.

Source

 * NOAA, "Frequently Asked Questions" (full-text).