Resource damage: Physical sabotage

An attacker can physically damage a satellite, with harmful commands or attacking it with another vehicle. Heaters and flow valves of the propulsion subsystem can be moved. Proximity operations with other satellites are possible (kinetic kill vehicles, radiofrequency jammers, lasers, chemical sprayers, high-power microwaves, and robotic mechanisms). Other possible attacks are against critical software subsystems or internal timers. ^{[1] [2]}