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Software/Hardware Complex VHF Signal Properties Prediction for Ground, Sea and Air Paths


The complex is designed to facilitate:

  • control the radiometeorology of the radio signal propagation path,
  • assessment and prediction of statistical characteristics of radio signals,
  • prediction of the range of radio and radio-location observability of radio sources, transmission range, disruption of radio signal trajectory due to atmospheric inhomogeneity,
  • signal imitation for testing of algorithms and programs designed for signal processing devices.


Minimum input data for prediction:

  • operation frequency and transmitting antenna parameters (wavelength of 3 m to 3 cm; width of the receiving beam of transmitting antenna 0.1-20°),
  • parameters of signal propagation medium,
  • matrix of heights and electrical characteristics of the terrain
  • Typical calculation time for a standard computer is within 5—15 minutes for paths of up to 250 km and a wavelength of at least 3 cm
  • Accuracy of signal loss assessment is 4-5 dB


  1. A source of information about the propagation medium was selected (sounding apparatus, the internet, ITU recommendations, radioclimatic atlases, including proprietary developments of TUSUR)
  2. Calculation methods were selected (approximate rapid methods or accurate numerical methods based on a parabolic wave equation, and their combinations)
  3. Assessment of radio source properties based on the received signals


The complex can be integrated into the following systems, both for civil and military purposes:

  • centralized telecommunications control systems, electronic intelligence, radar ranging and radio monitoring systems,
  • mobile surveillance systems on aircraft, ships and surface facilities,
  • signal prediction systems for ground, sea and space paths.