Because providing collision avoidance and other warnings to civilian satellites is not a core activity of the military. Logically, NORAD Air Defense Sector con

Because providing collision avoidance and other warnings to civilian satellites is not a core activity of the military. Logically, NORAD Air Defense Sector controllers have the radar data to provide traffic advisories to civilian airliners flying outside FAA radar coverage, but they rarely do so. If an unknown aircraft is detected above 18,000ft (i.e possible collision hazard to airline traffic) without a transponder and within the US Air Defense Identification Zone, ADS controllers may attempt contact on emergency guard frequency 121.5, which is commonly monitored by airliners. There are also USAF/USN controllers responsible for specific sectors that may attempt contact. ADS would likely scramble jet fighters too.