METHOD FOR MEASURING THE LEVEL OF RADIO OBSERVABILITY AND APPARATUS FOR IMPLEMENTATION THEREOF Russian patent published in 2021 - IPC G01S13/88 

FIELD: measuring.

SUBSTANCE: group of inventions relates to means for measuring the level of radio observability. Substance: useful signals from navigation spacecrafts (NS) emitting navigation signals are detected from one or more deployed global navigation satellite systems. Three-dimensional registration of the signal reception point is performed. The approximate parameters of the orbit and the coordinates of the NS are determined based on almanacs. Criterial selection of the NS is performed. The value of the elevation coordinate of the selected NS relative to the reception point is determined based on ephemerides. The NS signal amplitude is calculated. The dependence of the calculated signal amplitude on the elevation coordinate is plotted. Compliance with the condition of reaching the maximum coordinates of the NS is verified. The level of radio observability is calculated on the based on the plotted dependence of the signal amplitude on the elevation coordinate. The apparatus for measuring the level of radio observability is comprised of an antenna (A) and a receiver (1) for receiving signals from navigation spacecrafts of a global navigation satellite system, a navigation and computing unit (2) for measuring the amplitude and relative positioning of the navigation spacecrafts and the receiver, a computing and recording unit (3) for calculating the level of radio observability. A navigation spacecraft from the deployed global navigation satellite system is used as the signal source. Search and detection of the navigation signal, three-dimensional registration of the reception point, processing of almanacs, criterial selection of navigation spacecrafts, processing of ephemerides and signal amplitude of the navigation spacecrafts, tracking of the navigation spacecrafts and issuance of the relative coordinates of the navigation spacecrafts and the signal amplitude to the computing and recording unit (3) are conducted in the navigation and computing unit (2).

EFFECT: simplification of tools for measuring the level of radio observability.

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