Surface to Orbital Weaponry

Surface to Orbital Weaponry, or StO for short, refers to any kind of weapon designed and/or used to reach orbit from the surface of a planet. Such weapons are usually designed to defend said planets from orbital invasions and are capable of hitting and damaging warships in space. These weapons are usually extremely powerful as a result. The most common kind of StO weapons are usually in that of a large cannon, usually a railgun or plasma cannon, built on the surface of a planet usually in the form of a large fortress. However, other kinds of StO weapons exist such as StO missile batteries which launch anti-ship missiles from silos or miniature StO cannons formed as part of an artillery battery. These are usually much better hidden at the cost of being less capable and/or cheaper to construct and maintain. 
Some StO cannons are also built as large military bases coupled with an airbase or airfield either internally or as an external part of the base. Most usually are built with or along side several point defense weapons for short range defense such as SAMs and AA weapons. 
Many galactic governments and civilizations have employed StO weaponry as their main form of defense on important planets, or in some cases, moons. 
== Known StO cannons ==
=== United Earth Federation ===
StO Cannon Vyriy / Installation Vyriy - Earth (Europe, Poland-Belarus-Ukraine)
StO Cannon Shangri-La - Earth (North America, East Coast)
StO Cannon Olympus / Fort Olympus - Earth (North America, West Coast)
StO Cannon Aztlán - Earth (South America)
StO Cannon Zerzura / Fort Zerzura - Earth (Central Africa, Chad-Libya) [Notes: Under the command of Central Africa Region Command)
StO Cannon Avalon / Installation Avalon - Earth (Southern Africa) [Notes: Under the command of South Africa Region Command)
StO Cannon Penglai - Earth (East Asia, China)
StO Cannon Lemuria / Fort Lemuria - (Pacific Ocean/Central Pacific Ocean)