EXPERIMENTAL MEASUREMENTS OF THE GROUND CLOUD EFFLUENTS AND CLOUD GROWTH FOR THE MAY 20, 1975, TITAN IIIC LAUNCH AT AIR FORCE EASTERN TEST RANGE, FLORIDA

摘要

The report summarizes the effluent measurements and tests of ground cloud behavior made during the May 20, 1975, Titan IIIC (Air Force 777) launch from the Air Force Eastern Test Range (launch complex 40), Florida. The launch took place at 1404 universal time (1004 eastern daylight time). The launch vehicle effluent monitoring experiments were carried out jointly by Langley Research Center, Marshall Space Flight Center, and Kennedy Space Center, all of the National Aeronautics and Space Administration (NASA).nThe experiment included surface level and airborne in situ cloud measurements of the exhaust effluents from the Titan IIIC solid rocket boosters. Simultaneous visible spectrum photographic pictures of the ground cloud as well as infrared imaging of the cloud were obtained to study the cloud rise, growth, and direction of travel within the Earth's surface mixing layer. The predictions of cloud growth, direction of travel, and expected surface level effluent concentrations prepared with the NASA multilayer diffusion model were made prior to launch and after launch using measured meteorological conditions. Prelaunch predictions were used to position the effluent monitoring instru¬ments, and the postlaunch predictions were compared with the measured data.