@spiceErrorCheck<EOL>def mtxm(m1, m2):
m1 = stypes.toDoubleMatrix(m1)<EOL>m2 = stypes.toDoubleMatrix(m2)<EOL>mout = stypes.emptyDoubleMatrix()<EOL>libspice.mtxm_c(m1, m2, mout)<EOL>return stypes.cMatrixToNumpy(mout)<EOL>
Multiply the transpose of a 3x3 matrix and a 3x3 matrix.

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

:param m1: 3x3 double precision matrix.
:type m1: 3x3-Element Array of floats
:param m2: 3x3 double precision matrix.
:type m2: 3x3-Element Array of floats
:return: The produce m1 transpose times m2.
:rtype: 3x3-Element Array of floats