Propagation Effects for Radar & Communication Systems Training examines the atmospheric effects that influence the propagation characteristics of radar and communication signals at microwave and millimeter frequencies for both earth and earth-satellite scenarios. These include propagation in standard, ducting, and sub-refractive atmospheres, attenuation due to the gaseous atmosphere, precipitation, and ionospheric effects. Propagation estimation techniques are given such as the Tropospheric Electromagnetic Parabolic Equation Routine (TEMPER) and Radio Physical Optics (RPO).
Formulations for calculating attenuation due to the gaseous atmosphere and precipitation for terrestrial and earth-satellite scenarios employing International Telecommunication Union (ITU) models are reviewed. Case studies are presented from experimental line-of-sight, over-the-horizon, and earth-satellite communication systems. Example problems, calculation methods, and formulations are presented throughout the course for purpose of providing practical estimation tools.
- 3 days of Propagation Effects for Radar & Communication Systems Training with an expert instructor
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- We can adapt this Propagation Effects for Radar & Communication Systems course to your group’s background and work requirements at little to no added cost.
- If you are familiar with some aspects of this Propagation Effects for Radar & Communication Systems course, we can omit or shorten their discussion.
- We can adjust the emphasis placed on the various topics or build the Propagation Effects for Radar & Communication Systems course around the mix of technologies of interest to you (including technologies other than those included in this outline).
- If your background is nontechnical, we can exclude the more technical topics, include the topics that may be of special interest to you (e.g., as a manager or policy-maker), and present the Propagation Effects for Radar & Communication Systems course in a manner understandable to lay audiences.
Upon completing this Propagation Effects for Radar & Communication Systems course, learners will be able to meet these objectives:
The target audience for this Propagation Effects for Radar & Communication Systems course:
The knowledge and skills that a learner must have before attending this Propagation Effects for Radar & Communication Systems course are:
- Basic technical knowledge
- Fundamental Propagation Phenomena. Introduction to basic propagation concepts including reflection, refraction, diffraction, and absorption.
- Propagation in a Standard Atmosphere. Introduction to the troposphere and its constituents. Discussion of ray propagation in simple atmospheric conditions and explanation of effective-earth radius concept.
- Non-Standard (Anomalous) Propagation. Definition of sure fraction, super refraction, and various types of ducting conditions. Discussion of meteorological processes giving rise to these different refractive conditions.
- Atmospheric Measurement/Sensing Techniques. Discussion of methods used to determine atmospheric refractivity with descriptions of different types of sensors such as balloon sondes, rocket sondes, instrumented aircraft, and remote sensors.
- Quantitative Prediction of Propagation Factor or Propagation Loss. Various methods, current and historical for calculating propagation are described. Several models such as EREPS, RPO, TPEM, TEMPER, and APM are examined and contrasted.
- Propagation Impacts on System Performance. General discussions of enhancements and degradations for communications, radar, and weapon systems are presented. Effects covered include radar detection, track continuity, monopulse tracking accuracy, radar clutter, and communication interference and connectivity.
- Degradation of Propagation in the Troposphere. An overview of the contributors to attenuation in the troposphere for terrestrial and earth-satellite communication scenarios.
- Attenuation Due to the Gaseous Atmosphere. Methods for determining attenuation coefficient and path attenuation using ITU-R models.
- Attenuation Due to Precipitation. Attenuation coefficients and path attenuation and their dependence on rain rate. Earth-satellite rain attenuation statistics from which system fade margins may be designed. ITU-R estimation methods for determining rain attenuation statistics at variable frequencies.
- Ionospheric Effects at Microwave Frequencies. Description and formulation for Faraday rotation, time delay, range error effects, absorption, dispersion, and scintillation.
- Scattering from Distributed Targets. Received power and propagation factor for bistatic and monostatic scenarios from the atmosphere containing rain or turbulent refractivity.
- Line-of-Sight Propagation Effects. Signal characteristics caused by ducting and extreme sub-refraction. Concurrent meteorological and radar measurements and multi-year fading statistics.
- Over-Horizon Propagation Effects. Signal characteristics caused by troposcatter and ducting and relation to concurrent meteorology. Propagation factor statistics.
- Errors in Propagation Assessment. Assessment of errors obtained by assuming lateral homogeneity of the refractivity environment.