Space is important from the point of view of civil and military.

Image 1) Large-size air-launched rockets can also have an ASAT capacity. 

Space is the last of frontiers. Even if there are rules up there, regular people cannot ever see satellites or they see only their cores. If, they have telescopes. 

Spaceborne positioning is important for GPS-homing, smart munitions. And those munitions are the most effective actors on the battlefield. Also, satellites are the ultimate tools for reconnaissance missions. Military communication satellites are delivering orders to strategic missile submarines. That makes those satellites military targets. 

And they can be like an eye that watches the ground. If military forces can destroy those communication satellites it can deny the SLBM submarines to get their launching codes. Destroying the positioning satellites makes the GPS ammunition ineffective. 

Image 2:) F-15 Releases ASAT

They fly high above Earth. So regular anti-aircraft systems cannot threaten satellites. 

The ground-based ASAT-capable missiles are very large tools. And they are "easy to destroy" if the weapon system can lock to those targets. The ASAT missiles also install in naval vessels. 

Submarine-based ASAT weapons can destroy things like positioning satellites. Many of those land- or sea-based missiles are modified SLBM- or ICBM weapons. But larger rockets like Delta IV and its variants can rise the ASAT weapons to orbital trajectory. 

But ASAT weapons can also install on aircraft. The system that bases F-15 and quite a small missile is interesting. The coordinates upload to the weapon itself. It's connected to the autopilot. Then the ASAT will drive the fighter to the right position and releases itself. And the pilot can fly the aircraft home. 

Image 3:) X-37B

Image 3B:) 

Miniature shuttle, by Virgin Galactic corporation. Similar shuttles can use in the same missions with X-37B.

And one mission of the miniature shuttles like X-37B might work as an ASAT weapon. The air-launched ASAT systems are easy to transport to the way of the targeted satellite's trajectory. Things like the Pegasus rocket can modify into an ASAT missile. And the killer satellite can wait at the orbital trajectory. The small-size satellites can use kinetic energy penetrators. 

Image 4:) Delta IV Medium lifts off. 

Or they can impact their targets like the NASAs Dart probe made to an asteroid.  Also, the positioning and recon satellites can equip with counter-strike systems. Those systems can look like the Israeli "Trophy" system. The counter-strike system itself can be a machine gun that uses "Gyrojet" ammunition. 

Gyrojet is a small rocket. And if that system uses a similar ignition system with the metal storm it denies recoil. In that kind of space machine gun, the back of the weapon is open. And that eliminates the recoil that causes problems for satellites. Maybe Gyrojet was not successful in the Vietnam jungle but the same concept can use in space weapons. 

The idea is that satellites can destroy incoming missiles by using that weapon. But these kinds of systems are also effective against other satellites. 

And the thing is this: weapon race will go to space. GPS satellites, along with spaceborne recon and communication systems, play vital roles in conflicts. So those satellites are a very good target for anti-satellite systems. 

https://www.boeing.com/defense/autonomous-systems/x37b/index.page

https://www.space.com/virgin-orbit-plan-aid-nato-europe

https://en.wikipedia.org/wiki/ASM-135_ASAT

https://en.wikipedia.org/wiki/Gyrojet

https://en.wikipedia.org/wiki/Trophy_(countermeasure)

Image 1:) https://www.space.com/virgin-orbit-plan-aid-nato-europe

Image 2:) https://en.wikipedia.org/wiki/ASM-135_ASAT

Image 3:) https://www.boeing.com/defense/autonomous-systems/x37b/index.page

Image 3B:) https://techstory.in/virgin-galactic-secures-faa-approval-to-commercialize-space-tourism/

Image 4:) https://en.wikipedia.org/wiki/Delta_IV

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