Radar Scope-A-SCOPE, B-SCOPE, C-SCOPE, D-SCOPE, E-SCOPE, F-SCOPE, G-SCOPE, H-SCOPE, I-SCOPE, J-SCOPE, K-SCOPE, L-SCOPE, M-SCOPE, N-SCOPE, O-SCOPE, P-SCOPE, R-SCOPE, PPI, RHI
This tutorial section on radar basics covers following sub topics:
Main Page Terminology Measurements Doppler Radar FMCW RADAR BANDs RADAR SCOPE Weather Radar Ground radar RANGE and RESOLUTION Range calculator
This page covers radar scope which is used as display unit for various measurements. These CRT display units are of many types depending upon display range and other parameters. They are A-scope, B-scope, C-scope, D-scope, E-scope, F-SCOPE, G-SCOPE, H-SCOPE, I-SCOPE, J-SCOPE, K-SCOPE, L-SCOPE, M-SCOPE, N-SCOPE, O-SCOPE, P-SCOPE, R-SCOPE, Plan Position Indicator(PPI) and Range Height Indicator(RHI).
Plan Position Indicator(PPI)
Plan Position Indicator(PPI) display unit is circular in shape and is large. This PPI radar scope is used for surveillance and acquisition purpose. It displays range and azimuth(referred as bearing information). This polar kind of radar display indicates range using concentric circles and bearing all around the scope from 0 degree to 360 degree.
A-scope displays amplitude of echo on the vertical axis and range on the horizontal axis.
B-scope displays range on vertical axis and bearing information on horizontal axis. This radar scope is used in surface to air missile based tracking radars. It is rectangular in shape.
C-scope displays azimuth angle of target on horizontal axis and elevation angle on vertical axis.
D-scope is similar to C-scope.
E-scope is similar to RHI. It displays distance on horizontal axis and elevation angle on vertical axis.
F-scope is rectangular display. The vertical axis represents elevation angle and horizontal axis represents azimuth angle. The target appears as centralized blip on display panel when antenna looks at the target.
G-scope is similar to F-scope. The target appears laterally centralized blip when the antenna looks at the target in azimuth. Here vertical axis represents elevation angle and horizontal axis represents azimuth angle. Wings appear on the blip when the distance to the target is reduced.
H-scope is modified B-scope. The vertical axis represents range and horizontal axis represents azimuth angle. It provides elevation. The target appears as two closely placed blips on display panel. It appears as a short bright line. The slope is proportional to elevation angle.
In I-scope, target appear as a circle when the antenna looks at it. The radius of the circle gives range. If the antenna does not rightly point at the target then it appears as segment on the display.
J-scope is modified A-scope. Here time base is circle. The target appears as radial deflection from the time base.
K-scope is modified A-scope. Here target appears as pair of vertical deflections.
In L-scope , target appears as two horizontal blips from center or vertical.
M-scope is basically A-scope. It indicates range. The range is found by moving adjustable pedestal signal along base line until it coincides with horizontal position of echo signal deflection.
N-scope is a K-scope. Here, adjustable pedestal signal is used to measure range.
O-scope is basically A-scope. It gives range of the target. An adjustable notch is adjusted to measure range.
P-scope provides azimuth angle information.
R-scope is A-scope. It provides range information. It consists of a segment of time base expanded near the blip to achieve good accuracy in range.
Range Height Indicator (RHI)
Range Height Indicator (RHI) displays altitude on vertical axis and range of target on horizontal axis.