TABLE 2 (end) System 1 System 2 System 3 System 4 Characteristics Units 5 MHz 13 MHz 25 MHz 42 MHz Transmitter emission bandwidth 3 dB kHz 26 54 105 128 20 dB 58 70 150 170 Suppression of harmonics Yes (1) Range depends on a number of environmental factors: external noise, significant wave height, current speed, location of radar (such as proximity to water, nearby obstructions), and the operating frequency. (2) Range reduces significantly during night time. (3) While the sweep bandwidth is adjustable (higher bandwidth produces higher resolution data), the systems are normally operated at the typical sweep bandwidths specified due to limited available bandwidth, and the need to coexist with other radio systems. (4) Specifies the frequency for optimum performance from a scientific perspective. Entire frequency range not needed for operations. (5) RBW stands for resolution bandwidth. TABLE 3 Characteristics of generic oceanographic frequency modulated continuous wave (FMCW) radars System 5 System 6 System 7 System 8 System 9 Characteristics 8 MHz 12 MHz 16 MHz 25 MHz 42 MHz Function Very long-range Long range Standard High-resolution Best resolution short oceanographic oceanographic oceanographic oceanographic range measurements measurements measurements measurements measurements Maximum operational 150-300 (average 100-150 (average 50-100 (average 30-60 (average during 10-20 (average during km (measurement) range during daytime)(1) during daytime)(1) during daytime)(1) daytime)(1) daytime)(1) Range resolution km 3-12 1-3 1-3 0.5-2 0.15-0.5 High resolution mode: High resolution mode: 0.5 km 0.25 km Sweep bandwidth kHz 50-12.5 150-50 300-50 600-75 300-1 000
TABLE 2 (end) Characteristics Units System 1 5 MHz System 2 13 MHz System 3 25 MHz System 4 42 MHz Transmitter emission bandwidth 3 dB 20 dB kHz 26 58 54 70 105 150 128 170 Suppression of harmonics Yes (1) Range depends on a number of environmental factors: external noise, significant wave height, current speed, location of radar (such as proximity to water, nearby obstructions), and the operating frequency. (2) Range reduces significantly during night time. (3) While the sweep bandwidth is adjustable (higher bandwidth produces higher resolution data), the systems are normally operated at the typical sweep bandwidths specified due to limited available bandwidth, and the need to coexist with other radio systems. (4) Specifies the frequency for optimum performance from a scientific perspective. Entire frequency range not needed for operations. (5) RBW stands for resolution bandwidth. TABLE 3 Characteristics of generic oceanographic frequency modulated continuous wave (FMCW) radars Characteristics System 5 8 MHz System 6 12 MHz System 7 16 MHz System 8 25 MHz System 9 42 MHz Function Very long-range oceanographic measurements Long range oceanographic measurements Standard oceanographic measurements High-resolution oceanographic measurements Best resolution short range measurements Maximum operational (measurement) range km 150-300 (average during daytime)(1) 100-150 (average during daytime)(1) 50-100 (average during daytime)(1) 30-60 (average during daytime)(1) 10-20 (average during daytime)(1) Range resolution km 3-12 1-3 1-3 High resolution mode: 0.5 km 0.5-2 High resolution mode: 0.25 km 0.15-0.5 Sweep bandwidth kHz 50-12.5 150-50 300-50 600-75 300-1 000
R-REC-M.1874-1-201302-I!!MSW-E.docx