z(km) σ 63.487 0.002 63.497 0.274 61.794 0.277 61.786 0.059 59.894 0.062 59.516 0.063 59.524 0.28 58.011 0.283 58.002 0.065 57.832 0.555 56.127 0.503 55.961 6.101 54.069 6.104 54.145 8.115 52.253 8.118 52.076 3.444 50.561 3.392 50.435 0.077 48.735 0.134 48.945 0.677 45.539 0.682 45.519 0.139