Description
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. If the specified body is a member of the Earth-Moon system, the counterpart not specified will also be considered in shadow evaluation.
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 millisecond timing precision mode. Millisecond timing precision mode is deprecated and will be removed in a future release. We recommend that you migrate your Mission Plans to nanosecond timing precision mode.
Click here to see the documentation for this object in nanosecond timing precision mode.
Overload List
Signatures |
Return Value |
Description |
Determines the entry time, exit time, and duration of a Spacecraft's pass through the shadow of the spacecraft's central body. |
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Determines the entry time, exit time, and duration of a Spacecraft's pass through the shadow of a CelestialObject specified by celestialObject. |
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Determines the entry time, exit time, and duration of a Spacecraft's pass through the shadow of a CelestialObject specified by celestialObjectName. |
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Determines the entry time, exit time, and duration of a Spacecraft's pass through the shadow of a CelestialObject specified by celestialObjectID. |
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Determines the entry time, exit time, and duration of a Spacecraft's pass through the shadow of the spacecraft's central body. |
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Spacecraft.ShadowTimes(CelestialObject celestialObject, Array EventTime, Array EventType) |
Determines the entry time, exit time, and duration of a Spacecraft's pass through the shadow of a CelestialObject specified by celestialObject. |
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Spacecraft.ShadowTimes(String celestialObjectName, Array EventTime, Array EventType) |
Determines the entry time, exit time, and duration of a Spacecraft's pass through the shadow of a CelestialObject specified by celestialObjectName. |
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Spacecraft.ShadowTimes(Variable celestialObjectID, Array EventTime, Array EventType) |
Determines the entry time, exit time, and duration of a Spacecraft's pass through the shadow of a CelestialObject specified by celestialObjectID. |
See also
Coverage and Contact Analysis Guide