Computes the distance from the target at which to begin a descent, given a
desired descent angle (flight path angle).
A standard 3-degree glidepath is common for ILS and RNAV approaches.
The result is the horizontal distance in nautical miles from the target
point at which the descent should begin.
Parameters
currentAltitudeFt: number
Current altitude in feet MSL.
targetAltitudeFt: number
Target altitude in feet MSL.
descentAngleDeg: number
Desired descent angle in degrees (positive value).
Returns number
Distance from the target to begin descent, in nautical miles.
Computes the distance from the target at which to begin a descent, given a desired descent angle (flight path angle).
A standard 3-degree glidepath is common for ILS and RNAV approaches. The result is the horizontal distance in nautical miles from the target point at which the descent should begin.