@spiceErrorCheck<EOL>def dvsep(s1, s2):
assert len(s1) is <NUM_LIT:6> and len(s2) is <NUM_LIT:6><EOL>s1 = stypes.toDoubleVector(s1)<EOL>s2 = stypes.toDoubleVector(s2)<EOL>return libspice.dvsep_c(s1, s2)<EOL>
Calculate the time derivative of the separation angle between
two input states, S1 and S2.

http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/dvsep_c.html

:param s1: State vector of the first body.
:type s1: 6-Element Array of floats
:param s2: State vector of the second body.
:type s2: 6-Element Array of floats
:return: The time derivative of the angular separation between S1 and S2.
:rtype: float