Convert Cartesian (ECEF) Coordinates to lat, lon, alt

ECEF2LLA - convert earth-centered earth-fixed (ECEF) cartesian coordinates to latitude, longitude, and altitude.

USAGE:
[lat,lon,alt] = ecef2lla(x,y,z)

lat = geodetic latitude (radians)
lon = longitude (radians)
alt = height above WGS84 ellipsoid (m)
x = ECEF X-coordinate (m)
y = ECEF Y-coordinate (m)
z = ECEF Z-coordinate (m)

Notes: This function assumes the WGS84 model. Latitude is customary geodetic (not geocentric).

Michael Kleder, April 2006