What weakness do all space-based missile defense systems share?

• A. They are static defenses, which adversaries can observe, analyze, and calculate ways to defeat or avoid.
• B. They are vulnerable to extreme temperature changes as the satellites pass in and out of sunlight.
• C. Orbital perturbations throw off their aim, making them inaccurate.
• D. None of these answers are correct; space-based missile defense systems have no weaknesses.

Answer: (A)

Space-based missile defenses sit in fixed orbital paths, so their positions, timing, and sensor footprints are highly observable and predictable. That visibility lets an adversary with space awareness map exactly when and where an intercept could occur and design countermeasures to defeat or avoid it—such as deploying decoys, spoofing, saturating the system, or even targeting the satellites themselves. In contrast, the other options describe challenges that engineers design to overcome (thermal cycling, orbital perturbations) and are not universal or intrinsic weaknesses of space-based defenses. So the shared weakness is the predictability and trackability of these assets because of their fixed orbits.