An airborne telescope-camera system is described which is used for high-speed, high spatial resolution photography of reentry vehicles during atmospheric reentry. The limits to spatial resolution in the field of the system are identified and the theoretical performance of the system is analyzed in terms of modulation transfer functions. The predicted resolution. of 2.0-2.5 arc sec agrees with a measured field performance of about 2.5 arc sec, and such performance is currently maintained in the field for a period of one year.
Gerald M. Daniels,
Gordon L. Dryden,
"An Airborne Telescope-Camera System for High-Resolution Reentry Vehicle Photography," Optical Engineering 13(2), 130298 (1 April 1974). https://doi.org/10.1117/12.7971680