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Definition

Technical Performance Measure

TPM

A key technical parameter tracked across the lifecycle against a defined threshold and objective, with planned values at each review gate. Common TPMs: mass, power, availability, range, latency.

Related terms

Test Readiness ReviewTRR

A phase gate review confirming that the test program, test procedures, test facilities, and test articles are ready for ...

Thermal Control SystemTCS

The subsystem that maintains spacecraft temperatures within acceptable ranges. Uses passive methods (coatings, MLI, radi...

Two-Line Element SetTLE

A standardized 70-character text format for representing the orbital elements of an Earth-orbiting object at a specific ...

True Anomaly

The angle from periapsis to the spacecraft's current position, measured at the focus of the orbital ellipse. Tracks wher...

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