Function topOfDescentFromRate

topOfDescentFromRate(
    currentAltitudeFt: number,
    targetAltitudeFt: number,
    descentRateFtPerMin: number,
    groundSpeedKt: number,
): number
Computes the distance from the target at which to begin a descent, given a desired descent rate in feet per minute and a groundspeed.
Parameters
- currentAltitudeFt: number
  Current altitude in feet MSL.
- targetAltitudeFt: number
  Target altitude in feet MSL.
- descentRateFtPerMin: number
  Desired descent rate in feet per minute (positive value).
- groundSpeedKt: number
  Groundspeed in knots.
Returns number
Distance from the target to begin descent, in nautical miles.
- Defined in descent.ts:47