ATI's Propagation Effects for Radar
& Comm Systems course
- Fundamental Propagation Phenomena. Introduction to basic
propagation concepts including reflection, refraction, diffraction and
- 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 subrefraction,
supperrefraction and various types of ducting conditions. Discussion of
meteorological processes giving rise to these different refractive
- Atmospheric Measurement/Sensing Techniques. Discussion of methods
used to determine atmospheric refractivity with descriptions of different
types of sensors such as balloonsondes, rocketsondes, instrumented aircraft
and Remote Sensing.
- 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
- 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
- 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 atmosphere containing
rain or turbulent refractivity.
- Line-of-Sight Propagation Effects. Signal characteristics caused by
ducting and extreme subrefraction. Concurrent meteorological and radar
measurements and multi-year fading statistics.
- Over-Horizon Propagation Effects. Signal characteristics caused by
tropsocatter 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.
This course is not on the current schedule of open enrollment courses. If you are interested in attending this or another course as open enrollment, please contact us at (410) 956-8805 or at firstname.lastname@example.org and indicate the course name and number of students who wish to participate. ATI typically schedules open enrollment courses with a lead time of 3-5 months. Group courses can be presented at your facility at any time. For on-site pricing, request an on-site quote. You may also call us at (410) 956-8805 or email us at email@example.com.