Study of Spatial Resolution and Muon Tomographic Imaging Properties of Glass RPCs, Q. Li, Peking University, China − Prototyping glass Resistive Plate Chambers (RPC) with LC delay-line readout method were constructed and tested.  Detection efficiencies for cosmic rays of about 95% were obtained for both avalanche and streamer modes of operation.  A narrow profile for avalanche signal mode is obtained, which lead to an intrinsic spatial resolution less than 1.0 mm FWHM.  Spatial resolution test results show that the glass RPCs are very promising detectors for Muon Tomography for discriminating high-Z nuclear materials in containers or vehicles.  We meanwhile report imaging results of a Muon Tomography Station prototype based on glass RPCs.