METHOD TO DETERMINE SECURITY LIMIT WITH COMPENSATION FOR COMPUTATION DELAYS Russian patent published in 2010 - IPC G01S5/08 

FIELD: space navigation.

SUBSTANCE: proposed method relates to determining security limit PL_pos(t+Δt) around moving body computed for future time interval t+Δt from satellite data coming from constellation of satellites. Proposed method comprises selecting security threshold related with location in future time interval P_ir, distributing said threshold between security threshold related with location P_{ir pos} and that threshold related with speed P_{ir v}. Then, location and speed is determined for moving body at given moment t, statistical errors related with location and speeds are computed for said given moment. Proceeding from results obtained and security thresholds related with location and speeds, determined are security limit, PL_pos(t), related with location at given moment and security, limit PL_pos(t+Δt), related with speed at given moment to compute security limit so that where γ is maximum possible acceleration of moving body.

EFFECT: higher reliability of determination.

6 cl, 2 dwg