Rothermel, J., L.D. Olivier, R.M. Banta, R.M. Hardesty, J.N. Howell, D.R. Cutten, S.C. Johnson, R.T. Menzies, and D.M. Tratt (1998), Remote sensing of multi-level wind fields with high-energy airborne scanning coherent Doppler lidar, Opt. Express, 2, 40-50.