Walker said that the UK and US were "in discussion" in regard to placing the radars "possibly in Scotland or further south."
The radars will have around 10 to 15 "parabolic antenna [large satellite dishes] for tracking and four to six for transmitting" and will cover an area of around 1 square kilometer (0.4 square mile).
The project is called the Deep Space Advanced Radar Capability (DARC). It is being developed at the US Space and Missile Systems Center. In total, it is planned for three sites to be built: one in the UK, one in Australia, and another one in Texas.
The purpose of the base would be to "detect and track targets which could potentially be threats to our high-value assets" the colonel explained.
"It could be from the Chinese, it could be from the Russians, it could be anti-satellite or it could be debris in space," he added.
DARC will not be the first US spy base in the UK. Other US spy bases based in the UK include RAF Flyingdales on Snod Hill in the North York Moors which provides an early warning system for incoming ballistic missiles.