What is side scanning radar?
Side-looking airborne radar (SLAR) is an aircraft- or satellite-mounted imaging radar pointing perpendicular to the direction of flight (hence side-looking). The platform of the radar moves in direction of the x-axis. The radar “looks” with the looking angle θ (or so called off-nadir angle).
Why does the radar need to look to a side?
5.45, side-looking radars point the antenna beam sideways, hence avoiding the left-right ambiguity of nadir-looking systems. The backscattered energy in side-looking observations is typically lower than in the nadir-looking radars, i.e., side-looking radars require in general higher transmit power.
What is SLAR system?
The Side-Looking Airborne Radar (SLAR) is an image-producing system that derives its name from the fact that the radar beam is transmitted from the side of the aircraft during data acquisition. SLAR is an active sensor; the system provides its own source of illumination in the form of microwave energy.
What is Side Scan fish finder?
Side-imaging fish finders allow you to scan the water from side to side for schools of fish and underwater structures. However, if you’re into shallow-water fishing, side-imaging technology allows for more extensive coverage. Side imaging also impacts the type of fish you’re able to detect.
What is dual side scan sonar?
A sidescan sonar uses high-frequency sound pulses that are bounced off the sea floor to create an image of the sea floor morphology shape) and show differences in seabed texture and substrate types. Typically, a sidescan sonar consists of two transducers mounted in a towed body or ‘fish’.
What is real aperture radar?
Real aperture radar (RAR) is a form of radar that transmits a narrow angle beam of pulse radio wave in the range direction at right angles to the flight direction and receives the backscattering from the targets which will be transformed to a radar image from the received signals.
What is radar azimuth?
The first piece of information is the angle of the radar beam with respect to north; called the “azimuth angle”. The second is the angle of the beam with respect to the ground; called the “elevation angle”. The third piece of information needed is the distance (D) from radar to target.
What is range resolution in SAR?
Resolution of ERS SAR The ERS SAR has a bandwidth of 15.6 MHz, an antenna length of 10 m and a look angle of 23˚. The ground range resolution is about 25 m and the maximum azimuth resolution is 5 m. In practice, one averages several “looks” together to improve the quality of the amplitude (backscatter) image.
What are SAR satellites?
Capella’s constellation of synthetic aperture radar (SAR) satellites provides 24-hour all-weather Earth observation. What makes SAR unique is its ability to penetrate atmospheric conditions, providing near real-time visibility in cloud covered areas, both day and night.
What is side-looking airplane radar (SLAR)?
Side-looking airborne radar (SLAR) is an aircraft- or satellite-mounted imaging radar pointing perpendicular to the direction of flight (hence side-looking).
What is the side-looking viewing geometry of imaging radar system?
Figure 1: Side-looking viewing geometry of imaging radar system. The platform (aircraft or satellite) of a side-looking airborne radar (SLAR) travels forward in the flight direction with the nadir directly beneath the platform. The microwave beam is transmitted obliquely at right angles to the direction of flight illuminating a swath.
What is the difference between side-looking and nadir-looking radars?
The backscattered energy in side-looking observations is typically lower than in the nadir-looking radars, i.e., side-looking radars require in general higher transmit power. Real aperture radars (RARs) and SARs are typically operated in side-looking geometries.
What is the looking angle of a radar?
The radar “looks” with the looking angle θ (or so called off- nadir angle). The angle α between x-axis and the line of sight (LOS) is called cone angle, the angle φ between the x-axis and the projection of the line of sight to the (x; y)-plane is called azimuth angle.