![© Navico Company Confidential 2 A Short History of Radar ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Digital Radar Processing and the New Low Power Radars
- 1. Navico BR24 Radar Odin Sletten Technical Sales Engineer Navico Denmark
- 3. In 1935, The British invented and patented the first radar for aircraft defence
- 6. Blurs and distorts objects, making it difficult to interpret surroundings and navigate safely
- 7. Obscures objects closest to the boat, where visibility is most important for collision avoidance
- 8. Difficulty distinguishing targets from clutter - requires experience to safely operate
- 9. Inconvenient installation and operation
- 10. Magnetron takes several inconvenient minutes to warm up
- 11. Magnetron has a limited life, and is expensive to replace
- 12. Large cables and connectors
- 13. Power consumption is impractical for small boats and most sailboats
- 16. Radar is finally easy enough for a novice – identifies targets clearly with no ‘tune control’, as sea and rain clutter rejection is 5-10 times better than a pulse radar
- 18. © Navico Company Confidential 8 Comparison and Main bang main bang 4 kW HD pulse radar, 1/8 NM range BroadBand Radar, 1/16 NM range
- 19. © Navico Company Confidential 9 Comparison and Main bang main bang suppression 4 kW HD pulse radar, 1/8 NM range Broadband Radar, 1/16 NM range
- 20. © Navico Company Confidential 10 Close Range Performance
- 21. © Navico Company Confidential 11 Approximate position of boat Close Range Performance Moored boat Foot bridge 4 kW HD pulse radar Broadband Radar
- 22. © Navico Company Confidential 12 Superb Resolution Pile moorings Moored boat 4 kW HD Pulse Radar BroadBand Radar
- 23. © Navico Company Confidential 13 Seaclutter Performance Two boats, towing into the harbour 4 kW HD pulse radar, 1/2nm Sea clutter rejection 50% BroadBand Radar ¼ NM No sea clutter rejection applied
- 24. What makes the difference?
- 26. The pulse propagates outwards in a direction determined by the angle of the rotating radar antenna at the time of transmission.
- 27. The radar then switches to receive mode to listen for reflections.
- 28. If the pulse reflects off an object, it will return to the receiver with a delay proportional to the distance of the object from the transmitter.
- 30. Transmits a ‘rising tone’ (Tx wave) with linear increasing frequency
- 31. The wave propagates out from the transmitter retaining the frequency it had when it was transmitted
- 32. If it reflects off an object, it will return to the receiver, still at the frequency it had when originally transmitted
- 36. Eliminates 2-3 minutes warm-up time typical of magnetron pulse radars
- 37. Conserves power; operating power drain is ~30% less than the best 2 kW radar (<1/20 in standby mode) – extremely beneficial for sailboats and smaller power boats
- 42. Extremely low power - less than 1/10th of the transmitted emissions of a mobile phone; install in any position, even on the smallest of boats
- 46. Extremely low power - less than 1/10th of the transmitted emissions of a mobile phone; install in any position, even on the smallest of boats
- 47. Super small custom 13.5 mm RJ45 connector and round 9 mm pre-connected radar cable allows simple bridge tube installations
- 50. No blind spot at center (mainbang)
- 51. Totally safe, 0.1 W TX – install anywhere
- 52. InstantOn – no warm up time
- 53. Lower power consumption, no standby power
- 54. Five times better sea and rain clutter performance
- 56. © Navico Company Confidential 30 Long Range Performance Scanner height Target Object at sea level Small boat (2 m high) Big launch (6 m high) 2 metres 3.1 miles 6.3 miles 8.5 miles 3 metres 3.8 miles 7.0 miles 9.2 miles 4 metres 4.4 miles 7.5 miles 9.8 miles Maximum range for any radar under ideal circumstances: __________________________________________________________________________ So….. there is no possible way a radar on a small/medium boat can see a large launch at more than 10 miles But… It may be possible to see rain or high land features beyond 10 miles.
- 57. © Navico Company Confidential 31 Further Enhancement Navico’s R&D teams have developed technologies, which bring interference from other radar and onboard reflectors to a minimum or even totally eliminates them. This also means we are not depending on already patented technologies, which would have influenced the price of the radar.
- 59. 50% less than a 4 kW radar
- 60. Power consumption in standby is only 1.6 W
- 63. Easy to operate. No tuning or adjusting required
- 64. Very low sidelobe effects
- 65. Totally safe, 0.1 W TX – install anywhere
- 66. No magnetron that wears out over time
- 67. Easy to install – 9 mm cable and very small connector