DLD-100C radar is the only monopulse secondary surveillance radar in China that has obtained the certificate of authority issued by the CAAC. The radar adopts series advanced technologies such as high-gain array antenna with large vertical aperture, single-pulse azimuth angle measurement, full-solid state and digital IF receiver, with S mode(EHS)、complete online BIT function、seamless automatic switchover function and two identical interrogator channels configuration. It can provide information of range, azimuth, code, altitude and special status of civil aviation aircrafts (with transponder), complies with ICAO specifications, and is used extensively in modern ATC systems. We can provide series of MSSR products, e.g. single-channel, dual-channel and miniature single-channel upon user requirement.