Skip to main content
Try the DemoSign InSign Up
← Back to Glossary
Definition

Positive Train Control

PTC

US rail safety system mandated by the Rail Safety Improvement Act of 2008. Prevents train-to-train collisions, derailments from excessive speed, and incursions into work zones.

Related terms

Payload

The instrument or system that performs the mission's primary function. For Earth observation: cameras or sensors. For co...

Perigee

The point in an orbit closest to the central body. For Earth orbits, the lowest altitude above Earth's surface....

Phase Gate

A review milestone where a program's readiness to proceed to the next development phase is evaluated. Standard gates inc...

Power Budget

An accounting of electrical power generation (solar panels, batteries) and consumption (subsystems, payload, heaters) ac...

See this concept in action

Extant Portal implements mission engineering concepts as interactive tools.

Start Your PilotSee Features