However, Mr Weeden believes Russia is still a long way from successfully deploying its ASAT technology against foreign targets.
He said: “That is probably a least a few years away”.
According to the expert, the Nudol interceptor can target satellites up to 1,240 miles (2,000km) – the upper limit of LEO.
Most US spy satellites are placed in geostationary orbits of about 22,200 miles (35,730km).
And according to Pavel Podvig, director of the Russian Nuclear Forces Project, there is no clear sign ASAT technology is has any useful real-world applications.
He said during the webinar: “Basically, with this kind of ASAT, or even with a more kind of advanced ASAT, it’s hard to imagine a military mission in which this capability would be useful.”