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-call Stevenson -call Kattenbach: steies pain "movies" from Skylab -show Dick the Skylab FDF -MET/lat- long in HP41C.... +FDF "map" 1) get feet for angular fields of view: [[handwritten diagram]] d=htanθ take h = 1700 feet (pattern altitude at EFD [[40' with arrow pointing to EFD]]). (DFL 410 viewing angle: [[3 columned table]] |30°|d = 959'|(3.9 nmi)| |45°|d = 1660'|(6.8 nmi)| |60°|d = 2875'|(11.7 nmi) suggest looking down Rwy 22 while in 17/35 pattern using runaway markings. how far away (on Earth) is horizon from 150 nmi orbit? [[handwritten diagram]] sinθ=R/R+h θ=73.35° (to horizon) ∴ φ=16.65° arc subtended by φ=1000 nmi (distance on Earth that can be seen) (x=993 nmi):