Tobar, M.E.Ivanov, E.N.Stanwix, P.L.le Floch, J.M.Hartnett, J.G.2014-11-042014-11-0420082008 IEEE International Frequency Control Symposium, FCS, 2008, pp.729-73297814244179571075-6787http://hdl.handle.net/2440/86917We present results from an odd parity test of Lorentz invariance in electrodynamics, based on a rotating microwave interferometer with permeable material in one arm. The experiment has been operating continuously since September 2007. Results set a limit on the standard model extension (SME) scalar Lorentz violating parameter, kappa(tr), of -0.8plusmn3.6times10⁻⁷.en©2008 IEEEConference paper003001069810.1109/FREQ.2008.46230952-s2.0-55749083030136636