Vladislav V Demyanov
Irkutsk State Transport University
Russia
Title: GNSS positioning availability control under space weather hazards
Biography
Biography: Vladislav V Demyanov
Abstract
A problem of real-time GNSS user positioning availability control under geomagnetic storms, solar radio flares and other irregular impacts is considered. A new methodology of positioning availability control under irregular external impacts is offered. The positioning availability value is defined as a full probability of event when we get a personal GNSS user’s required navigation parameters (RNP) taking in account the current Positioning Delusion of Precision (PDOP), ranging errors and positioning errors. On a basis of GNSS/LAAS network dataset we get current GNSS performance statistics, such as positioning error standard mean and standard deviation and a number of positioning failures within the observation period. The PDOP values are used in order to compute an ancillary alarm index of a probable sudden positioning deterioration under poor GNSS satellite vehicles (SV) geometry. The method can be recommended for some transportation applications which have strong RNP, such as aviation landing systems and automatic railroad traffic control.