Which statement about the Upgraded Early Warning Radar (UEWR) network is true?

• A. They are not related to SSPARS or PARCS.
• B. They include SSPARS at multiple sites and PARCS at Cavalier SFS, North Dakota.
• C. They replaced GEODSS entirely.
• D. They rely solely on space-based sensors.

Answer: (B)

The Upgraded Early Warning Radar network is part of the broader space surveillance architecture and works with other sensor systems. It specifically includes SSPARS radars at multiple sites to provide wide-area surveillance, and it uses PARCS at Cavalier Space Force Station in North Dakota for acquisition and perimeter radar tasks. This combination shows how UEWR integrates with existing sensor fleets rather than standing alone or replacing other systems.

Why the other statements don’t fit: the UEWR is indeed related to SSPARS and PARCS, not independent of them; GEODSS is not replaced entirely by UEWR—GEODSS remains an optical deep-space surveillance system; and UEWR relies on ground-based radars rather than solely on space-based sensors.