抄録
Position lines of a satellite Doppler navigation are the lines that the cones and the earth sphere cut each other. They resemble hyperbolic lines. Differentiating the equation of position lines, we get the formula which gives the accuracy of the position lines. When the observations are repeated the fix position is obtained. Its accuracies are investigated along track and cross track. If height error exists the position lines are displaced. Then, we showed the family of position lines.
