code: def vperp(a, b):
      
      a = stypes.toDoubleVector(a)
      b = stypes.toDoubleVector(b)
      vout = stypes.emptyDoubleVector(3)
      libspice.vperp_c(a, b, vout)
      return stypes.cVectorToPython(vout)
docs: 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