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The National Science Foundation (NSF) plans to install a new Atmospheric Watch Observatory (AWO) to upgrade its research facilities at Summit Station, Greenland. The AWO welded-steel lower frame exceeds the size and weight limits for airlift transport; therefore, the only option to transport it to Summit is the Greenland Inland Traverse (GrIT) by using the newly developed Air Ride Cargo Sleds (ARCS). The study objectives were to determine whether GrIT can safely transport the AWO structure to Summit Station. The study addressed three assembly cases by estimating the transport-induced stresses and structural deformation by using the finite element method (FEM). The present analyses results strongly suggest that a preassembled AWO can safely travel to Summit via GrIT, which would allow NSF to realize cost and schedule savings. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents. DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR. ERDC/CRREL TR-18-16 iii

Dynamic modeling of Atmospheric Watch Observatory (AWO) transport by Greenland Inland Traverse (GrIT)