METHOD FOR DETERMINATION OF ASTRONOMIC COORDINATES BY ASTROLABE Russian patent published in 1998 - IPC

FIELD: astronomy. SUBSTANCE: method includes recording of time moments of star image observation which is performed at deviation of rated star zenith distance Z_pi from standard Z_r not exceeding half angle of field of vision. Time angular distance of two images of star ΔY_i is measured in field of vision at recorded moments of time. Operations are carried out for four and more stars at different azimuths A_i, and astronomic coordinates are determined as sums of initial coordinates ϕ_o, λ_o and corrections Δϕ and Δλ, to them. Corrections are determined by solution of system of equations Δϕ cosA_i+Δλ cosϕ_osinA_i+ΔZ+m(ΔY_i/2) = Z_pi-Z_r, where i ≥ 4; m, ΔZ - are image scale and systematic error, respectively, included in unknown quantities. EFFECT: higher results of measurement.