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Definition

Engineering Change Proposal

ECP

A formal request to modify a baselined design or specification. ECPs go through review boards to assess cost, schedule, and technical impact before approval.

Related terms

Eclipse

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

End of LifeEOL

The planned end of a spacecraft's operational mission. EOL power and thermal analysis accounts for degradation of solar ...

Eccentricity

A dimensionless orbital element describing how much an orbit deviates from a perfect circle. Values range from 0 (circul...

Escape Velocity

The minimum speed needed for an object to break free of a gravitational body's influence without further propulsion. Fro...

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