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Definition

End of Life

EOL

The planned end of a spacecraft's operational mission. EOL power and thermal analysis accounts for degradation of solar panels, batteries, and thermal coatings over the mission lifetime.

Related terms

Downlink

Data transmission from a spacecraft to a ground station. Downlink budget analysis determines if the signal is strong eno...

Eclipse

The period during an orbit when the spacecraft is in the shadow of the central body and cannot generate solar power. Ecl...

Geostationary OrbitGEO

A circular orbit at approximately 35,786 km altitude with zero inclination and an orbital period matching Earth's rotati...

Ground Segment

The collection of ground-based systems that support a space mission, including ground stations, mission control centers,...

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