'This is easily visualized by considering a two-component error rectangle. If the two components, x and y, have upper limits at the boundary of the rectangle of Bx and By, then four possibilities exist: x < Bx. and y ^Bj, x>Bx and y > By, x< Bx and y > By, and x>B„ and y < By. However, only the first combination results in the point defined by (x,y) being inside the box. The probability of this occurring is clearly less than either the probability of x< Bx or the probability of y < By.

Fig. 11-10. Probability Interpretation of Error Ellipse From Fig. 11-9

Fig. 11-10. Probability Interpretation of Error Ellipse From Fig. 11-9

Table 11-1.

Probability (or Location of the Attitude with Gaussian Measurement Errors

Table 11-1.

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