Orbital weapons systems

The UNN's Orbital Weapon Systems, also known as the UNN Railgun Platform is a system of orbital defense satellites built to protect earth from an outside attack. It is one of the United Nations Navy's most poweful weapons.
Railguns are large, powerful mass drivers, cannons that use electroconductive rails and the Lorentz Effect to accelerate a dense metal slug at very high speeds, relying on mass and sheer speed to punch clean through ships rather than warheads like with missiles. These weapons require significant power (presumably supplied by a fusion power-plant) to fire and must charge briefly before firing.
The entire weapons platform is 81 meters long with the visible barrel taking up two-thirds of the satellite's total length. This cannon is the peak of the UNN's railgun armament, able to accurately hit ships at up to 2 AU's away and leaving even vessels with missile armaments helpless.
At the rear end of the platform is a number of medium thruster modules designed to compensate for the cannon's recoil, as well as keeping it from falling into Earth's gravity. RCS thrusters are positioned across the chassis to turn and aim the weapon, while also used to help move it around.
Seemingly automatically operated and remotely fed firing solutions from a command station, the satellite is built to be compact, being not much larger (if at all) than a Truman-class's Farren-pattern railgun turret. Without the need for rooms to carry a crew or supplies, it simply houses a reactor, a control unit, a magazine, and of course, its sole armament.

Item type

Weapon, Ranged

Current Location

Earth

Manufacturer

United Nations Navy

Owning Organization

The United Nations

Dimensions

81m