pint.derived_quantities.p_to_f

pint.derived_quantities.p_to_f(p: Quantity, pd: Quantity, pdd: Quantity | None = None)

Converts P, Pdot to F, Fdot (or vice versa)

Convert period, period derivative and period second derivative (if supplied) to the equivalent frequency counterparts. Will also convert from F to P.

Parameters:

• p (astropy.units.Quantity) – pulsar period (or frequency), \(P\) (or \(f\))

• pd (astropy.units.Quantity) – period derivative (or frequency derivative), \(\\dot P\) (or \(\\dot f\))

• pdd (astropy.units.Quantity, optional) – period second derivative (or frequency second derivative), \(\\ddot P\) (or \(\\ddot f\))

Returns:

• f (astropy.units.Quantity) – pulsar frequency (or period), \(f\) (or \(P\))

• fd (astropy.units.Quantity) – pulsar frequency derivative (or period derivative), \(\\dot f\) (or \(\\dot P\))

• fdd (astropy.units.Quantity) – if pdd is supplied, then frequency second derivative (or period second derivative), \(\\ddot f\) (or \(\\ddot P\))