PLAN POSITION INDICATOR
Radar Glossary
Radar — Plan Position Indicator
Information on Plan Position Indicator
The plan position indicator (PPI) is possibly the best
known of all radar displays where the targets are shown
in a plan format. The display, therefore, resembles a map
with the radar site at the centre of the display.
Range is indicated by displacement from the centre of the
display and the radial displacement from the vertical represents the
target’s azimuth angle.
A variation on the plan position indicator
is called the sector PPI where only the relevant sector
is shown on the display.
A sector plan position indicator (sector PPI) is often employed by radars with extremely
high antenna scan rates but limited azimuth coverage. An example
of such a radar is a maritime patrol radar that
may employ a sector PPI display when the radar switches
from a 360o surveillance mode to concentrating on a specific
sector in which a periscope is detected.
Other topics in our resources on Radar related to Plan Position Indicator include:
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