Spacecraft.MltDescendingNode Property

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Description

Returns the Mean Local time (MLT) of the Spacecraft's sub-satellite point at each Descending Node crossing. This method will return a null data value (-999) until the Spacecraft crosses a descending node. See the help file for a description on how FreeFlyer calculates the MLTDN.

FreeFlyer calculates the Mean Local time of the Spacecraft's sub-satellite point at the Descending node in the following manner:

MLTDN = GMT + TimeToNode + LDN * 24.0 hours / 360.0 deg

where:

•GMT: Number of hours past midnight at the Spacecraft's current epoch in the UT1 time system (between 0 and 24.0 hours)

•TimeToNode: Travel time to the Descending Node (in hours)

•LDN: Geographic East longitude of the Descending Node (between -180 and 180 degrees)

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.

Attributes

Type:	number
Access:	read
Units:	hr

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

Syntax

myVariable1 = mySpacecraft1.MltDescendingNode;