urn:nasa:pds:context:instrument:ksu-hpwel.chepil_wt 1.0 1.11.0.0 Product_Context 2019-02-01 1.0 Initial creation of the context product. urn:nasa:pds:context:facility:laboratory.ksu-hpwel instrument_to_facility 10.2136/sssaj1959.03615995002300060019x Chepil, W.S. (1959) Equilibrium of Soil Grains at the Threshold of Movement by Wind, Soil Science Society of America Journal, 23(6): 422-428. Zingg, A. and W.S. Chepil, (1950), Aerodynamics of Wind Erosion, Agr. En., Vol.31, June 1950, pp. 279-282, 284. Chepil Wind Tunnel at The High Plains Wind Erosion Laboratory, Kansas State University Atmospheric Sciences Historical wind tunnel build by W.S. Chepil at Kansas State University. The tunnel was 17.07 m in length with a cross-section area of 0.91 m x 0.91 m, with a boundary layer depth of approximately 0.30 m.