title: Get ECEF XYZ given starting coordinates, range, azimuth, and elevation
body: <p>I'm having a problem locating anything on converting RAE to XYZ.</p>
  
  <p>If I am on a WGS84 spheroid, at say position -742507, -5462738, 3196706 and I detect an object at a range of 30km, azimuth of 310, and elevation angle of 18 degrees how can I convert that to ECEF XYZ coordinates?</p>
  
  <p>Thanks.</p>