Determines the entry time, exit time, and duration of a Spacecraft's pass through the shadow of a central body. Events are reported for Penumbra, Umbra, or Annular shadow condition geometries.
The shadow times are determined using a conical shadow. The algorithm to determine the times a Spacecraft is in any portion of the occulting body is shown in the diagram below.
Algorithm used to determine if a Spacecraft is in the occulting body's shadow.
Note: This method uses a spherical model for the occulting body. Use the options available in the VisibilityCalculator to exercise more control over the analysis.
Timing Precision Mode
This page describes functionality in nanosecond timing precision mode.