FIELD: measuring.
SUBSTANCE: invention relates to methods of measuring the coefficient of reflection of a radio signal from the earth's surface in tasks of flight research and testing of radio communication channels and navigation of mobile objects (airplanes, helicopters, UAVs) and can be used to optimize parameters of test flights based on measurement results of the actual reflection coefficient (ARC) of the test UHF radio signal from the earth surface of the test route and predicting changes in the test radio signal in real test conditions of aviation radio systems using a mathematical model of radio wave propagation. Flight tests (FT) of systems of aviation radio communication, radio navigation and their antennae in aircraft are final and obligatory stage in process of their development and creation. One of the important tasks of the FT is the evaluation of the capabilities of their operation in conditions of interfering reflections from environmental objects, primarily from the surface of the earth, having a significant effect on the accuracy and reliability of determining technical characteristics (range and quality of radio communication, measurement errors of navigation parameters, etc.) in given conditions of test paths.
EFFECT: improving the adequacy and accuracy of determining characteristics of aeronautical radio communication systems, radio navigation and their antennae during flight tests based on measuring the ARC of a radio signal from the earth's surface under test flight conditions (season, precipitation, types of vegetation, state of the test path, relative coordinates of the source and receiver, et cetera) with determination of dimensions of effective reflection area (eighth Fresnel zone) and implementation of predictive estimation of parameters of test radio signal for optimization of flight modes of aircraft under conditions of test route using double-beam model of its propagation.
1 cl, 6 dwg
