title: ÐÑÐµÐ½ÐºÐ° Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ¾Ð² Ð¿ÑÐ¸Ð½Ð¸Ð¼Ð°ÐµÐ¼ÑÑ ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð² Ð² ÑÐ¸ÑÑÐµÐ¼Ð°Ñ ÑÐ¿ÑÑÐ½Ð¸ÐºÐ¾Ð²Ð¾Ð¹ Ð³ÐµÐ¾Ð»Ð¾ÐºÐ°ÑÐ¸Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Estimation of received signals parameters in satellite geolocation systems
Creators: name: ÐÐ°ÐºÑÐ¸Ð¼Ð¾Ð², ÐÑÑÐµÑÐ»Ð°Ð²
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: ÑÐ¿ÑÑÐ½Ð¸ÐºÐ¾Ð²Ð°Ñ Ð³ÐµÐ¾Ð»Ð¾ÐºÐ°ÑÐ¸Ñ
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Ð¾ÑÐ»Ð°Ð±Ð»ÐµÐ½Ð¸Ðµ Ð¿Ð¾ Ð·ÐµÑÐºÐ°Ð»ÑÐ½Ð¾Ð¼Ñ ÐºÐ°Ð½Ð°Ð»Ñ
satellite geolocation
repeater satellite
radio emission source
a two-stage time difference of arrival method for determining coordinates
estimation of the RMS of the difference in delay and RMS of coordinates
estimation of the maximum likelihood
unknown signal
analysis band
parameters of the received signal
attenuation by the satellite channel

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¾ÑÐµÐ½ÐºÐµ ÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ Ð¼ÐµÑÑÐ¾Ð¿Ð¾Ð»Ð¾Ð¶ÐµÐ½Ð¸Ñ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° ÑÐ°Ð´Ð¸Ð¾Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ (ÐÐ Ð) Ð² ÑÐ¿ÑÑÐ½Ð¸ÐºÐ¾Ð²Ð¾Ð¹ Ð³ÐµÐ¾Ð»Ð¾ÐºÐ°ÑÐ¸Ð¸. Ð¦ÐµÐ»ÑÑ ÑÐ°Ð±Ð¾ÑÑ ÑÐ²Ð»ÑÐµÑÑÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐ¸ ÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ ÐºÐ¾Ð¾ÑÐ´Ð¸Ð½Ð°Ñ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° ÑÐ°Ð´Ð¸Ð¾Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ Ð¾Ñ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ¾Ð² Ð¿ÑÐ¸Ð½ÑÑÐ¾Ð¹ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð² ÑÐ¿ÑÑÐ½Ð¸ÐºÐ¾Ð²Ð¾Ð¹ Ð³ÐµÐ¾Ð»Ð¾ÐºÐ°ÑÐ¸Ð¸.
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description: This work is devoted to assessing the radio source (RS) localization accuracy in a satellite geolocation system. The goal of the work is to study the dependence of the radio source localization accuracy versus the incoming realizations parameters in satellite geolocation. 
The RS coordinates are estimated on the basis of a two-step time difference of arrival method. At the first step, the difference between delays of the received signals is estimated based on the maximum likelihood criterion, which reduces to finding the maximum of the cross-correlation function between the received reali-zations from the main and adjacent satellite transponders. At the second step, the system of equations is solved by the iterative method, which leads to an estimate of the RS coordinates.
As a result, a model was developed to assess the radio source localization accuracy in the satellite geolocation for the Russian satellites, RS and the ground station of the satellite geolocation system located in the Russian Federation. On the basis of the developed model, the dependences of the root mean square error of the RS position versus the attenuation in the adjacent channels, the signal band, the analysis interval and the analysis band under conditions of an unknown signal were determined. 
Based on the obtained dependencies, it was concluded that the discrepancy between the analysis band and the signal band leads to accuracy decrease, and an increase in the signal band and the analysis interval increase the RS coordinates determination accuracy.