FIELD: navigation system.
SUBSTANCE: protection levels are calculated on the horizontal and vertical, compared with appropriate emergency limits. Calculation of levels of protection is carried out with due allowance for error position, which can be caused by current measurements, introduction of factors reflecting the confidence range on the horizontal and vertical, for taking into account errors caused by signal during propagation from navigation space vehicles (NSV), and also errors of ephemerical-time data or corrections of satellite hours and orbit, or in case of use of the correcting information transferred from a wide-band functional auxiliaries.
EFFECT: technical result consists in improvement of reliability of high-precision navigation determination and shorter time for alerting the user on the integrity of navigation.
3 cl, 9 dwg
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