Space Regulatory Glossary Industry

ESIM

/ˈiːsɪm/ noun (abbr.) Earth Stations in Motion

1. Earth Stations in Motion. The FCC licensing category for satellite terminals that operate while moving: earth stations on vessels (ESVs), earth stations aboard aircraft (ESAA), and vehicle-mounted earth stations (VMES).
2. ESIMs are blanket-licensed by terminal type rather than fixed location under 47 CFR 25.228, and each category requires a U.S. point of contact available around the clock with authority to cease emissions.

Read: How Ground Station Licensing Works

Related terms

earth station A ground-based facility equipped to communicate with one or more satellites. Earth stations transmit uplink signals and… Part 25 Title 47 CFR Part 25, the section of the Code of Federal Regulations governing satellite communications in the United… FCC The Federal Communications Commission. The U.S. federal agency responsible for regulating interstate and international…

Mentioned in The Downlink

• How Ground Station Licensing Works: A Complete Guide

  Earth station types, FCC licensing steps, frequency coordination, ESIMs, and common mistakes. A plain-language guide to ground station licensing.

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