Section 7 True and False Echoes on Display
7-6
Memo
Under rain, the targets that enter within sea clutter may be more difficult to detect.
7.3.3 Coping with sea clutter and rain/snow clutter
Under the conditions of rough ocean due to bad weather, the use of S band radar is effective because
of its comparatively low influence from sea clutter and low attenuation against raindrops. When an X
band radar is used, the use of short pulse is effective by reducing the applied pulse width since a
reduction of the pulse width reduces the influence of interfering waves and also increases the effect of
interfering wave rejection function. The effect of interfering wave control can be enhanced further by
setting various items of Radar signal information.
By using the observation scene selection function, the optimum setting values can also be retrieved
according to various conditions such as weather (the setting value for Storm or Rain is recommended
for stormy weather).
For the description of the observation scene button, refer to "5.3.7
Adjusting to optimal images
(Selection of observation scenes)". While these settings are effective, targets, particularly, those that
move at high speed may not be recognised visually.
0
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Detection range while it is not raining (NM)
D
et
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tion r
ange
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Precipitation of 16mm/hr Pulse length 0.05µs
Precipitation of 4mm/hr Pulse length 0.05µs
Precipitation of 16mm/hr Pulse length 0.8µs
Precipitation of 4mm/hr Pulse length 0.8µs
Decreased Target Detection Range by X Band Radar due to Precipitation
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Detection range while it is not raining (NM)
Precipitation of 16mm/hr Pulse length 0.05µs
Precipitation of 4mm/hr Pulse length 0.05µs
Precipitation of 16mm/hr Pulse length 0.8µs
Precipitation of 4mm/hr Pulse length 0.8µs
Decreased Target Detection Range by S Band Radar due to Precipitation
D
et
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tion r
ange
w
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N
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Содержание JMR-5410-4X
Страница 2: ......
Страница 22: ...xx NQE 3167 Power Control Unit NCT 4106A NSK Unit NBA 5111 Rectifier Warning Label Warning Label Warning Label ...
Страница 25: ...xxiii NKE 2255 7 9 6HS Scanner Unit Warning Label ...
Страница 27: ...xxv NKE 2103 4 4HS Scanner Unit NKE 2103 6 6HS Scanner Unit NKE 2255 7 9 6HS Scanner Unit ...
Страница 54: ...Contents 20 ...
Страница 68: ...Section 1 Overview 1 14 Outline Drawing of Radar Antenna NKE 2632 A ...
Страница 70: ...Section 1 Overview 1 16 Outline Drawing of Radar Antenna NKE 2043 NKE 2043 ...
Страница 72: ...Section 1 Overview 1 18 Outline Drawing of Radar Antenna NKE 2103 4 4HS ...
Страница 74: ...Section 1 Overview 1 20 Outline Drawing of Radar Antenna NKE 2255 7 ...
Страница 76: ...Section 1 Overview 1 22 Outline Drawing of Radar Antenna NKE 2255 6HS ...
Страница 78: ...Section 1 Overview 1 24 Outline drawing of 19inch Display NWZ 214 NWZ 214 ...
Страница 80: ...Section 1 Overview 1 26 Outline Drawing of Process Unit NDC 1678 NDC 1678 ...
Страница 82: ...Section 1 Overview 1 28 Outline Drawing of Trackball Operation Unit NCE 5605 Option ...
Страница 84: ...Section 1 Overview 1 30 Outline Drawing of Junction Box NQE 1143 ...
Страница 86: ...Section 1 Overview 1 32 Outline Drawing of 19inch Desktop Frame CWB 1659 ...
Страница 88: ...Section 1 Overview 1 34 Outline Drawing of Interswitch Unit NQE 3141 8A Option ...
Страница 126: ......
Страница 214: ...Section 4 Range and Bearing Measurement Methods 4 32 ...
Страница 244: ...Section 5 Basic Operation of the Radar 5 30 ...
Страница 324: ...Section 8 Monitoring a Dragging Anchor 8 8 ...
Страница 374: ...Section 11 Setting up Screen View 11 20 ...
Страница 380: ...Section 12 Setting up Alerts 12 6 Polygon tab Set a polygon alarm issuing range This function cannot be used now ...
Страница 520: ...Section 15 Maintenance Inspection 15 70 ...
Страница 546: ...Section 16 Failures and After Sale Services 16 26 ...
Страница 590: ...Appendix A Radar Antenna Display Unit Block Diagrams A 8 A 1 8 NKE 2255 7 9 6HS ...
Страница 592: ...Appendix A Radar Antenna Display Unit Block Diagrams A 10 A 1 10 NKE 2063A ...
Страница 596: ...Appendix A Radar Antenna Display Unit Block Diagrams A 14 A 2 3 NCE 5794 operation unit ...
Страница 622: ...Appendix D Menu List and Materials D 8 Tools VHF Call VHF1 Call VHF2 Call VHF3 Call ...
Страница 687: ......