Acknowledgement

Summary form only given, as follows. On behalf of the IEEE Antennas and Propagation Group the Chairman, Administrative Committee would like to express our appreciation to the Administrative Committee of the Military Electronics Group for making it possible to share the material in this issue. The idea for the issue originated with G-MIL, and the work of assembling the material was carried out by the Guest Editor, Dr. John D. Kraus, under the auspices of that Group. However, knowing that the subject matter of Radio Astronomy is of immediate interest to our members, the Administrative Committee of the Military Electronics Group generously extended an invitation to us to participate in the publication and dissemination of this material. The offer was gratefully accepted. We present here an excellent example of cooperation between the compatible Groups of the IEEE.