P410s:
  exists from 9.06 to 97.74 degrees in the iasp91 model.
  with ray parameter from   11.115 down to    4.439 sec/deg.
  travel times from   207.77 to   859.15 sec.

  P going down as a P in the crust/mantle, layer 0 to 5, depths 0.0 to 2889.0, then turn
  P going up   as a P in the mantle, layer 5 to 4, depths 2889.0 to 410.0, then transmit up
  s going up   as a S in the crust/mantle, layer 3 to 0, depths 410.0 to 0.0, then end

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P410S (Ped410S):
  exists from 79.19 to 101.01 degrees in the iasp91 model.
  with ray parameter from   11.521 down to    8.323 sec/deg.
  travel times from  1274.47 to  1484.14 sec.

  P going down as a P in the crust/mantle, layer 0 to 3, depths 0.0 to 410.0, then transmit down
  S going down as a S in the mantle, layer 4 to 5, depths 410.0 to 2889.0, then turn
  S going up   as a S in the crust/mantle, layer 5 to 0, depths 2889.0 to 0.0, then end

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