Integration of InfraMAP with Near-Real-Time Atmospheric Characterizations and Applications to Infrasound Modeling
Abstract
Predicting the long-range propagation of infrasound relies on characterization of the propagation medium, namely, the global atmosphere from the ground to altitudes above 100 km. The ability to realistically model infrasound propagation depends on the fidelity of the atmospheric characterization. The analysis tool kit InfraMAP (Infrasound Modeling of Atmospheric Propagation) offers a range of options for specifying the propagation environment. The baseline capability utilizes global climatological models of temperature, wind, and air composition. Of particular interest herein is the recently developed capability to incorporate near-real-time atmospheric updates, such as the output from numerical weather prediction models, to supplement climatological characterization of the environment. New InfraMAP modules support integration of propagation models (ray-tracing, parabolic equation) with two versions of near-real-time atmospheric characterizations. First, output from the Navy's synoptic model NOGAPS (Navy Operational Global Atmospheric Prediction System) can be imported into InfraMAP and merged with the baseline climatological models, HWM-93 and NRL-MSISE-00. Second, output from the NRL-G2S specification can be imported and used to characterize the entire propagation environment. The primary objective of this research effort is development of an enhanced InfraMAP software tool kit that enables higher-fidelity infrasound propagation modeling by incorporating near-real-time atmospheric characterizations. A validation effort is also being undertaken to improve confidence in the modeling techniques and provide calibration in support of operational needs. Anticipated uses of the software include the following: in-depth analysis of events and scenarios of particular monitoring interest; sensitivity analyses; and detailed infrasound localization and detection studies. (5 figures, 9 refs.)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 13, 2003
- Accession Number
- ADA418449
Entities
People
- David E. Norris
- Robert G. Gibson
Organizations
- BBN Technologies