According to numerous sources the Iranians have 29 TOR missile systems which fire the SA-15. It’s sort of a tank chassis with radar, a three man crew, and either 8 or 16 missiles depending on model. The missile is popped out of its tube by a gas cartridge and then ignites its engine. This is the eight missile model.
Although they work best if integrated into a regional fire control network they are capable of independent action so in theory at least just the senior of the three guys in the crew could have made the call to launch.