Two-Body Celestial Fix

Estimated position-error (covariance-based) of a two-body celestial fix given sight crossing angle and per-sight random error.

CelestialFixSights

Loading calculator…

This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\sigma_{fix} = \frac{\sigma_{LOP} \sqrt{2}}{\sin \theta}

Symbol	Meaning	Unit
$\theta$	Angle between LOPs	deg
$\sigma_{LOP}$	Per-sight error (1σ)	nm

Source: Bowditch Pub.9 Ch.22

Estimated position-error (covariance-based) of a two-body celestial fix given sight crossing angle and per-sight random error.