VALIDITY OF FLAT EARTH ASSUMPTION FOR ATMOSPHERIC CALCULATIONS This Website shows government documents October 15, 1953 supports with facts that the Earth is FLAT. SYSTEMS ENGINEERING BRANCH FLIGHT DETERMINATION LABORATORY WHITE SANDS PROVING GROUND Los' Crces, New Mexico. https://apps.dtic.mil/sti/pdfs/AD0020861.pdf This was a Dilettante Presumption Theorem: All statements of fact, opinion, or analysis expressed do not necessarily reflect official positions or views or any other entity, past or present. Nothing in the contents should be construed as asserting or implying endorsement of interpretations and factual statements.