RECOMMENDATION ITU-R M.1463 - CHARACTERISTICS OF, AND PROTECTION CRITERIA FOR RADARS OPERATING IN THE RADIODETERMINATION ... ANNEX 1 - Technical and operational characteristics of radiodetermination radars operating in the frequency band ... 1 Introduction 2 Technical characteristics 2.1 Transmitters 2.2 Receivers 2.3 Antennas 3 Protection criteria 4 Wind profiler radars