obspy.taup.slowness_layer.bullen_radial_slowness

bullen_radial_slowness(layer, p, radius_of_planet, check=True)[source]

Calculate time and distance increments of a spherical ray.

The time and distance (in radians) increments accumulated by a ray of spherical ray parameter p when passing through this layer. Note that this gives half of the true range and time increments since there will be both an upgoing and a downgoing path. Here we use the Mohorovicic or Bullen law: p=A*r^B

The layer and p parameters must be either 0-D, or both of the same shape.

Parameters:

  • layer (ndarray, dtype = obspy.taup.helper_classes.SlownessLayer) – The layer(s) in which to calculate the increments.

  • p (ndarray, dtype = float) – The spherical ray paramater to use for calculation, in s/km.

  • radius_of_planet (float) – The radius of the planet to use, in km.

  • check (bool) – Check that the calculated results are not invalid. This check may be disabled if the layers requested are expected not to include the specified ray.

Returns:

Time (in s) and distance (in rad) increments.

Return type:

tuple(ndarray)