TeachMeFinance.com - explain PPINE
PPINE The term 'PPINE' as it applies to the area of the weather can be defined as ' Plan Position Indicates No Echoes, referring to the fact that a radar detects no precipitation within its range. An intensity-modulated display on which echo signals are shown in plain view with range and azimuth angle displayed in polar coordinates, forming a map-like display. Each PPI is taken at a single, fixed elevation angle, and thus forms a cone of coverage in space. PPIs may be run in sequence, creating a 'volume scan''.
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