Environmental Impact Assessment of U.S. Air Force Launches from Kodiak, Alaska

摘要

A comparison between noise predictions made with the RNOISE computation model and actual monitoring data, for two USAF atmospheric interceptor technology (ait) Program launches from the Kodiak Launch Complex (KLC), is presented. Maximum A-weighted sound pressure levels (L(sub AMAX)) recorded at locations within 2 km of the launch site ranged from approximately 103 to 105 dB for the two launch vehicles. A-weighted sound exposure levels (ASEL) from the same area ranged from approximately 109 dB to 113 dB. At 5.7 km from the launch site, in the vicinity of a haulout for endangered Steller sea lions, the measured ait-1 L(SUB AMAX) was reduced to approximately 78 dB while the ASEL was approximately 88 dB. The latter values agreed well with A-weighted sound levels predicted using RNOISE for the same location.