CONTENTS

Policy on Intellectual Property Right (IPR)     iii
RECOMMENDATION  ITU-R  M.1796     1
Characteristics of and protection criteria for terrestrial radars operating in the radiodetermination service in the frequency band 8 500-10 500 MHz     1
Scope     1
Annex 1  Technical and operational characteristics of radars in the radiodetermination service in the frequency band 8 500-10 500 MHz     2
1 Introduction  2
2 Technical characteristics  3
        2.1 Transmitters  22
        2.2 Receivers  22
        2.3 Antennas  22
3 Additional technical and operational characteristics of shipborne radionavigation systems in the 9 300-9 500 MHz band     23
4 Additional information relevant to maritime radionavigation radars  23
        4.1 Performance requirements and interference effects  23
5 Future radiodetermination systems  24
Annex 2   Protection criteria for radars     25
1 Protection criteria  25
        1.1 Continuous noise-like interference  25
                  1.1.1 Aggregation of interference contributions  26
        1.2 Pulsed interference  27
2 Shipborne radionavigation radars protection criteria  27
Annex 3  Results of interference trials     28
1 Interference to noise (I/N) radar trials  28
        1.1 Characteristics of specific radars under test 28
        1.2 Radar receiver interference suppression features  29
        1.3 Interfering signals and targets  29
        1.4 Non-fluctuating target generation  30
        1.5 Test results  30
                  1.5.1 Radar D   30
                  1.5.2 Radar E  31
        1.6 Summary of trials results  32