16th SPCS Defenders of critical satellite communications

More than 1,800 unclassified spacecraft are being tracked as they orbit earth, according to Space-tracl.org, the public data base for such items. They are communicating with receivers on the ground as well as each other.
Who is watching to make sure none of those signals are nefarious, aimed at disrupting communications between the satellites and the warfighters in various theaters who rely on those signals to conduct their missions?