convert_rschw_to_rstar

subroutine convert_rschw_to_rstar(rp, drpdt, d2rpdt2)

Routine that converts the particle location and time derivatives in Schwarszschild coordinates to Tortoise coordinates.

Type	Intent		Name
real(kind=wp),	intent(inout)	::	rp	On input the particle location in Schwarschild coordinates, $r^{\mathrm{p}}$ . On output the particle location in Tortoise coordinates, $r_*^{\mathrm{p}}$ .
real(kind=wp),	intent(inout)	::	drpdt	On input the time derivative of the particle location in Schwarschild coordinates, $\frac{dr^{\mathrm{p}}}{dt}$ . On output the time derivative of the particle location in Tortoise coordinates, $\frac{dr_*^{\mathrm{p}}}{dt}$ .
real(kind=wp),	intent(inout)	::	d2rpdt2	On input the second time derivative of the particle location in Schwarschild coordinates, $\frac{d^2r^{\mathrm{p}}}{dt^2}$ . On output the second time derivative of the particle location in Tortoise coordinates, $\frac{d^2r_*^{\mathrm{p}}}{dt^2}$ .

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