Spacecraft.FOVInterference(Star, Spacecraft, Variable, Sensor, Array, Array) Method

Description

Returns the time of entry into an area of interference, the time of exit from the area of interference, and the duration of interference. Interference is defined to be the period when both an object of interest and an interfering object are within the field-of-view of a Spacecraft sensor, and the interfering object lies within a user-specified cone about the Spacecraft to object-of-interest vector.

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.

Note: This is an interval method. See the Interval Methods page for more information.

Note: This method has a state. See the Methods and Properties with State page for more information.

Method Signature

Spacecraft.FOVInterference(	Star objectOfInterest,
	Spacecraft interferenceObject,
	Variable coneAngle,
	Sensor sensor,
	Array EventTime,
	Array EventType)

Arguments

objectOfInterest
Description:	The Star object in which the calling Spacecraft's sensor is interested. An element of a StarField object can be specified, i.e. myStarField[0].

interferenceObject
Description:	The Spacecraft object that will impose interference on the calling Spacecraft's sensor if it is positioned such that it meets the criteria above.

coneAngle
Description:	This is the half angle of the cone in degrees for which the interference is determined.
Units:	deg
Valid Range:	-360 ≤ coneAngle ≤ 360

sensor
Description:	Sensor to consider when evaluating interference.

EventTime

Description:

The time that the event occurred.

The FF_Preferences.IntervalEventReportingBehavior property controls whether the start of propagation is reported as an event. By default, if the interference starts before the beginning of the propagation span, FreeFlyer will label the start of the propagation as the start of the interference.

EventType
Description:	The type of the event that occurred. Event Type == 1 is entry into Contact. Event Type == 2 is exit from Contact.

Return Value

Type:

number

Returns the number of elements filled into EventType and EventTime arrays

Syntax

myVariable1 = mySpacecraft1.FOVInterference(myStar1, mySpacecraft2, myVariable2, mySensor1, myArray1, myArray2);