A military satellite is a type of spacecraft specifically designed for defense and security purposes. These satellites are used for various functions, including reconnaissance, communication, navigation, and surveillance. They help military forces gather intelligence and monitor activities on the ground and in the air. Military satellites operate in different orbits, such as low Earth orbit (LEO) and geostationary orbit (GEO). They provide real-time data and support operations by enabling secure communication between troops and command centers. Examples of military satellite systems include the Global Positioning System (GPS) and Milstar for secure communications.