https://space.skyrocket.de/doc_lau/mesos.htm
https://www.rocketryforum.com/threads/project-mesos-a-two-stage-flight-to-293-488-ft.175175/
Video downloaded Used rectilinear lenses, horizontal curve very visible and horizon much more limited than it would be on flat earth. Backbone mod to both GoPros 4.35MM 16MP LOW DISTORTION M12 https://www.back-bone.ca/product/4-35mm-16mp/ Amazing wide angle lens with no ‘fisheye’ distortion.