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Definition

Downlink

Data transmission from a spacecraft to a ground station. Downlink budget analysis determines if the signal is strong enough to be received with acceptable bit error rate.

Related terms

Critical Design ReviewCDR

A phase gate review that evaluates the detailed design to ensure it satisfies the requirements and can proceed to fabric...

Delta-VΔV

The change in velocity required for an orbital maneuver. A fundamental measure of the propulsive effort needed to transf...

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 ...

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