@spiceErrorCheck<EOL>def vperp(a, b):
a = stypes.toDoubleVector(a)<EOL>b = stypes.toDoubleVector(b)<EOL>vout = stypes.emptyDoubleVector(<NUM_LIT:3>)<EOL>libspice.vperp_c(a, b, vout)<EOL>return stypes.cVectorToPython(vout)<EOL>
Find the component of a vector that is perpendicular to a second
vector. All vectors are 3-dimensional.

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

:param a: The vector whose orthogonal component is sought. 
:type a: 3-Element Array of floats
:param b: The vector used as the orthogonal reference. 
:type b: 3-Element Array of floats
:return: The component of a orthogonal to b.
:rtype: 3-Element Array of floats