0
You're talking about the uncertainty of the bearing.
It varies with the design of the sonar equipment.
Wiki User
∙ 15y ago
Bearing resolution in sonar refers to the ability to distinguish between two closely spaced objects in terms of their direction relative to the sonar transducer. It depends on factors like the beamwidth, signal processing techniques, and the frequency of the sonar system. Higher bearing resolution allows for better target discrimination and localization.
Add your answer:
Earn +20 pts
What difference does frequency have in sonar?
Frequency in sonar refers to the number of sound waves emitted per second. Higher frequencies provide better resolution and detail in detecting objects, but have shorter range and are absorbed more easily by water. Lower frequencies can travel long distances underwater, but have poorer resolution. The choice of frequency in sonar depends on the specific application and desired trade-offs.
What is SONAR frequency range?
SONAR uses frequencies typically ranging from 10 kHz to 100 kHz for underwater communication and detection. The frequency used depends on factors such as the depth of the water being surveyed and the desired resolution of the SONAR system. Lower frequencies like 10 kHz are used for deep water surveying, while higher frequencies like 100 kHz offer better resolution for shallower depths.
How has sonar technology evolved from past to present?
Sonar technology has evolved from passive sonar systems used in World War I to active sonar systems that emit sound waves and detect their reflections. Modern sonar systems use advanced signal processing and computer algorithms for higher precision and improved target detection capabilities. Additionally, new developments in underwater acoustics have led to the use of multibeam sonar systems for mapping and imaging the seafloor with high resolution.
What are the limits of a sonar?
The range of a sonar system is typically limited by the power of the sound source and the sensitivity of the receiver. Depth limitations can also be affected by water temperature, salinity, and turbidity, which can absorb or scatter sound waves. Additionally, the resolution of a sonar system may be limited by factors such as the frequency of the sound waves and the size of the transducer.
What the frequencies of sonar are?
Sonar frequencies typically range from around 20 kHz to several hundred kHz. Lower frequencies can travel long distances in water, but higher frequencies provide better resolution for detailed imaging. The choice of frequency depends on the specific application and environmental conditions.
What is the technique used by submarines to locate their enemies?
They use sonar to find the enemy. Passively, they listen for the sounds of the other ships, which will give them a bearing to the target. Active sonar will ping the enemy and provide a range as well.
Do sonar produces ultrasound waves to map and locate objects underwater?
Yes, sonar uses sound waves, including ultrasound waves, to map and locate objects underwater. The system sends out sound pulses that bounce off objects and return to the sensor, allowing it to calculate distances and create images of the underwater environment.
What will happen if you increase the frequency in the sonar?
You may be able to have smaller antennae for the same resolution. If you use the same size of antenna, then spatial resolution will increase, provided the equipment has been so designed.
How does a ship use sonar?
There are two types of SONAR (Sound Navigation and Ranging) used...active and passive. Passive SONAR is simply listening under water using hydrophones. With passive SONAR a vessel can determine the bearing (direction) of whatever is creating the noise right away. Using triangulation (multiple bearings at timed intervals) passive SONAR can now determine range, bearing, and speed. But this can be time consuming. Pro - stealth Con - time consuming Active SONAR requires emitting a noise underwater that is on multiple frequencies. Not just a single loud 'ping' like in the movies. As the sound reaches an object underwater the noise bounces back to the vessel that emitted the sounds. Sounds travel at given speeds, and using a calculation you can almost immediately determine range along with bearing. A second quick active SONAR burst and you now have speed. But, now everyone listening knows you are there as well. Pro - quick results Con - exposes yourself
Will Scan resolution have a direct bearing on print resolution?
No, only on the quality. If you have a picture that is in low quality, perhaps because you scanned it that way, printing in high resolution won't be able to improve the image quality.
How did sonar effect the world war 1 outcome?
It didn't; Submarine Sonar wasn't developed until the '30's, and during WWII it saw limited use aboard submarines. Back then, it was essentially a bearing / speed indicator for a target, but not much more.
Can a sonar machine identify the object showing up on the sonar?
Sonar (which stands for SOund NAvigation and Ranging) can be made to identify the object it pings on - if active sonar; if passive sonar, identify the object making the sound it picks up. The higher the frequency of the active sonar ping, the better the resolution - but the shorter the range. At higher resolutions, it is not hard for the sonar to identify the object it pings on. At lower frequencies, the range is greater but it is harder for the sonar to identify what is being pinged. Another benefit of active sonar is the range and direction of the target can be discerned. Passive sonar just listens to the ambient water. Identification of the sound source can be made if the frequencies of the target making the sound are known and identified in a database. One problem with passive sonar is that it is hard to know the range of the target making the sound, although the direction will be known. Water temperature and depth have a great effect on sonar, so this must be taken into account when calculating distance. Sonar is used in the Military, Geological Surveying, and the Medical field.
What function does a periscope do on a submarine?
Periscopes have several primary functions: 1. Visual verification & identification of current Sonar targets. 2. Navigational fixes by using visual references (near shore or by use of attached sextant for star fixes). 3. Aiding in target tracking/range calculation. 4. Bearing, Speed, Angle on the Bow and Range match with Sonar and Fire Control prior to weapon shot. 5. Visual detection of any targets not picked up by Sonar due to poor sound conditions. Due to the way sound propagates in the ocean, it is possible to perform a Sonar sweep and not have any close-aboard (collision range) targets on sonar. However, when coming to Periscope Depth, if there is a thermal layer blocking sonar and any targets, it is essential to get a quick ID, range and bearing to any close-aboard target that may have been undetected by sonar. This is why the periscope is so important when ascending to PD. The Con officer can then order the helmsman to steer clear or emergency dive to avoid any close-aboard contacts. Visual verification, bearing and range are matched against Sonar's target information for 3 reasons: 1. You don't want to shoot anything you're not supposed to. 2. Sound propagation and ocean properties can alter the actual received target bearing, and hence the estimated range. 3. Visual verification, bearing and range via periscope ensures the best target solution for the torpedo before shooting. Of course this only applies to surface targets, and not submerged submarines. In such cases, a sonar-only target solution is used and fed into the torpedo guidance system prior to shooting.
Which method of studying the ocean floors gives some degree of proximity but is efficient in terms of time as well?
sonar sonar sonar sonar SONAR
Which method of studying the ocean floor gives some degree of proximity but is efficient in terms of time as well?
sonar sonar sonar sonar SONAR
Which is more expensive a boat with sonar or a satellite with sonar?
sattelite with sonar
What is the full word for sonar?
sonar
