FWReckon

MATLAB

[lat2,long2,BAZ] = FWReckon(lat1,long1,FAZ,rd,[EarthRadius])

Description

Function to compute a new LLA position given an LLA starting position, the forward Azimuth, and the down range using forward reckoning and great circles.

Parameters

Parameters	Description
lat1 [vector]	Starting latitude in degrees
long1 [vector]	Starting longitude in degrees
FAZ [vector]	Forward Azimuth in degrees (Azimuth from starting position to the new position)
rd [vector]	Desired down range (m)
EarthRadius [scalar/vector]	(Optional) Earth radius, single geometric earth radius (m) or 2 element vector, [Equatorial radius, Polar radius], of the geodetic earth radii (m). Defaults to mean earth radius.

Return Values

Return Values	Description
lat2 [vector]	New latitude in degrees
long2 [vector]	New longitude in degrees
BAZ [vector]	Back Azimuth in degrees (Azimuth from new position to starting position)

References

Uses T. Vincenty's method in Forward.for obtained from: ftp://www.ngs.noaa.gov/pub/pcsoft/for_inv.3d/source/forward.for
T. Vincenty, "Direct and Inverse Solutions of Geodesics on the Ellipsoid with Application of Nested Equations," Survey Review, vol. 23(176), pp. 88-93, 1975.

Group

Propagation Geometry

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