Under contract AF33(657)-11053 sponsored by Aeronautical Systems Division, Air Force Systems Command, USAF, a Nortronics developed stellar-inertial navigation system operating in a C-131B aircraft tracked the Echo I sat-ellite for a total of 17 minutes in daylight and darkness. Real-time data were produced which were comparable to that from ground tracking stations.
Jame s F. Lynch,
Fred A. Clark,
"Airborne Optical Satellite Tracking", Proc. SPIE 0008, Airborne Photo-Optical Instrumentation, (1 August 1967); doi: 10.1117/12.970986; https://doi.org/10.1117/12.970986