EM Propagation (METOC Impacts)
SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA ATMOSPHERIC PROPAGATION BRANCH
Pagination or Media Count:
LONG TERM GOALS Develop electromagnetic propagation models, that perform equally well over land and sea and in the presence of anomalous propagation conditions for both surface and airborne emitters, for use in operational or engineering propagation assessment systems. OBJECTIVES Develop an advanced unified hybrid radio propagation model based on parabolic equation and ray-optics methods for both surface-based and airborne applications. This model is named the Advanced Propagation Model APM and is the model used in the Advanced Refractive Effects Prediction System AREPS. Other objectives are to develop a propagation model for earth-satellite geometries suitable for inclusion into the Advanced Propagation Model APM or alternately, suitable for transition to the Advanced Refractive Effects Prediction System AREPS and the Naval Integrated Tactical Environmental Subsystem NITES II. As part of this development effort, an enhanced absorption model will be updated and rain attenuation models will be included within APM and the earth-to-satellite model ESPM. We will also perform a sensitivity study of the structure parameter using the Rough Evaporation Duct RED measurements. As a result of this study we will develop a suitable algorithm within APM accounting for turbulent effects in the marine boundary layer, providing a variance of the predicted instantaneous field strength.
- Radiofrequency Wave Propagation