Space Regulatory Glossary Spectrum

EIRP

/iː aɪ ɑːr piː/ noun (abbr.) Effective Isotropic Radiated Power

1. Effective Isotropic Radiated Power. The total power that a satellite or earth station antenna would need to radiate uniformly in all directions to produce the same signal strength as the actual directional antenna in its direction of maximum gain. Measured in dBW.
2. A critical parameter in every FCC satellite filing and ITU coordination analysis. EIRP limits are set to control interference between satellite systems and are a key constraint in spectrum sharing arrangements.

Related terms

interference Unwanted radio frequency energy that disrupts or degrades a satellite communication link. Interference can originate… transponder A device on a communications satellite that receives an uplink signal, amplifies it, shifts it to a different… FCC The Federal Communications Commission. The U.S. federal agency responsible for regulating interstate and international…

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