How does pulse width affect range resolution?

Range and resolution are determined by the pulse repetition frequency (PRF), pulse width (PW), and transmit power. A wide PW generally provides better range, but poor resolution. Conversely, a narrow PW has less range, but better resolution.

What happens when you increase the width of a pulse?

Increasing the pulse width increases the amount of energy reflected off the target and thereby increases the range at which an object can be detected. Radars measure range based on the time between transmission and reception, and the resolution of that measurement is a function of the length of the received pulse.

What affects radar accuracy?

The maximum range of a radar system depends in large part on the average power of its transmitter and the physical size of its antenna. There are specialized radars with (fixed) antennas, such as some HF over-the-horizon radars and the U.S. Space Surveillance System (SPASUR), that extend more than one mile (1.6 km).

What is range accuracy in radar?

Practically, the accuracy depends on the size of the individual range-cells in signal processing. ICAO recommends[3] a range cell size of 1/128 NM, i.e. about 14.5 m, for air traffic control air surveillance radar, which corresponds to a time interval of almost 10 nanoseconds.

What is the range accuracy of the radar?

What is pulse width of radar?

The pulse length is usually called the PULSE WIDTH in radar systems. The pulse interval, or the time from the beginning of one pulse to the beginning of the next, is determined by the number of pulses which are transmitted in a given period of time. In radar, we measure all time in seconds (or fractions of seconds).

What factors affect radar performance in which the ability of a radar to resolve between two targets on the same bearing but a slightly different ranges?

Range resolution is the ability of a radar to resolve between two targets on the same bearing, but at slightly different ranges. The principal factors that affect range resolution are pulse width, receiver gain, and indicator range scale.

What is the relation between scanner width and horizontal beam width?

A point target thus appears as an arc subtending an angle equal to HBW, at the centre of the PPI. This is called Beam Width Distortion. The value of the HBW of a RADAR set depends on the scanner, the larger the horizontal size, the smaller the HBW and vice versa.

What effect does changing PRF have on radar?

Conversely, higher PRFs produce shorter maximum ranges, but broadcast more pulses, and thus radio energy, in a given time. This creates stronger reflections that make detection easier. Radar systems must balance these two competing requirements.

Does pulse width affect radar sensitivity and range resolution?

The radar system’s pulse width, minimum detectable signal (MDS), receiver bandwidth and range resolution are all related. Changing the radar transmitter’s pulse width changes the radar’s sensitivity and range resolution. Unfortunately, those changes oppose each other.

What is pulse length and pulse interval in radar?

The pulse length is usually called the PULSE WIDTH in radar systems. The pulse interval, or the time from the beginning of one pulse to the beginning of the next, is determined by the number of pulses which are transmitted in a given period of time. In radar, we measure all time in seconds (or fractions of seconds).

What are the two types of resolution in radar?

Resolution is usually divided into two categories; range resolution and bearing resolution. Range resolution is the ability of radar system to distinguish between two or more targets on the same bearing but at different ranges.

What factors affect the performance of weather radar?

Radar Performance The actual performance of a weather system is a combination of many factors. Peak power, receiver sensitivity, pulse rate, pulse width and antenna size to name a few. The following pages describe the effect those factors have on radar performance.