// ORBITAL LOGISTICS AND PROPULSION TERM

Equatorial Orbit

An equatorial orbit is a path a satellite takes directly above the Earth's equator, meaning it circles the Earth at zero degrees of inclination.

Equatorial Orbit — illustration from Wikipedia
Image via Wikipedia

TECHNICAL DEFINITION

An equatorial orbit is a specific type of Earth orbit where a satellite's orbital plane lies within the Earth's equatorial plane, characterized by an inclination of 0 degrees, commonly used for communications and Earth observation.

BACKGROUND

The International Space Station (ISS) is a space station in low Earth orbit (LEO). It is the product of the International Space Station program and is operated by five partner space agencies: NASA, Roscosmos (Russia), ESA (Europe), JAXA (Japan), and CSA (Canada). It is the first space station built, maintained and crewed through international cooperation and the largest human spacecraft ever constructed. It is an orbital research station, where scientific experiments in microgravity are conducted and the space environment is studied. Since 2 November 2000, it has hosted the longest continuous presence of humans in space. Alongside Tiangong, it is one of the only two currently operational space stations.

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SYNONYMS & ALIASES

  • Zero-inclination orbit
  • equatorial plane orbit

USAGE NOTE

Satellites in equatorial orbits are ideal for continuous coverage of equatorial regions.

DEVELOPERS

Organizations developing technology related to Equatorial Orbit.

  • SpaceX

    Develops and operates advanced rockets and spacecraft, regularly launching payloads into Geostationary Transfer Orbit (GTO) for eventual placement in Geostationary Earth Orbit (GEO), a specific equatorial orbit.

  • Arianespace

    A leading launch service provider that frequently launches heavy payloads, primarily communication satellites, into Geostationary Transfer Orbit (GTO) from its equatorial launch site in Kourou, French Guiana.

  • Boeing Satellite Systems

    A major manufacturer of geostationary communication satellites, which are specifically designed to operate in an equatorial orbit.

  • Airbus Defence and Space

    A prominent developer and manufacturer of geostationary communication and earth observation satellites, utilizing equatorial orbits for critical missions.

  • Lockheed Martin Space

    Designs and builds a variety of satellites, including advanced geostationary communication and weather satellites that operate in equatorial orbits.

  • Intelsat

    Operates one of the world's largest fleets of communication satellites in geostationary orbit, driving the development and adoption of technologies for equatorial satellite operations.

  • ISRO (Indian Space Research Organisation)

    Develops and launches a range of communication and meteorological satellites into Geostationary Earth Orbit (GEO) from its near-equatorial launch site, and develops the associated launch vehicle and satellite technologies.

  • Maxar Technologies

    A developer of both geostationary communication satellites and advanced Earth observation satellites that can utilize equatorial or near-equatorial orbits for specific imaging and data collection missions.

  • SES

    A global content connectivity provider operating a large fleet of geostationary (GEO) satellites, requiring continuous innovation in satellite technology for equatorial orbits.

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