// ORBITAL LOGISTICS AND PROPULSION TERM

Spectrum

The range of electromagnetic frequencies used for communication, including radio waves, microwaves, and light, which are essential for satellite operations.

Spectrum — illustration from Wikipedia
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TECHNICAL DEFINITION

Spectrum refers to the range of electromagnetic frequencies allocated for various communication purposes, including satellite uplinks, downlinks, and inter-satellite links, which is a finite and regulated resource critical for data transmission, telemetry, and command & control in space operations.

BACKGROUND

The National Aeronautics and Space Administration is an independent agency of the U.S. federal government responsible for the United States' civil space program and for research in aeronautics and space. Headquartered in Washington, D.C., NASA operates ten field centers across the U.S. and is organized into three mission directorates: Human Spaceflight, Research and Technology, and Science. Established in 1958, NASA succeeded the National Advisory Committee for Aeronautics (NACA) to give the U.S. space program a distinct civilian orientation focused on peaceful applications. Since then, it has led most American spaceflight programs, including Project Mercury, Project Gemini, the Apollo program, Skylab, the Space Shuttle, the International Space Station (ISS) and the ongoing multi-national Artemis program.

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SYNONYMS & ALIASES

  • Radio spectrum
  • frequency band
  • electromagnetic spectrum
  • bandwidth

USAGE NOTE

Access to specific spectrum frequencies is highly regulated and crucial for satellite operators.

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