isoecho contour mode

isoecho contour mode
A mode of operation of a monochromatic weather radar. When the button for this mode is pressed, areas of precipitation corresponding to red on a color screen turn black. This leaves the lighter green portion around the black area, allowing changes in rainfall intensity to be better evaluated. A thin line of green indicates a rapid change in rainfall rates (steep rainfall gradient), and such an area should not be penetrated because of the inferred high degree of turbulence.

Aviation dictionary. 2014.

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  • isoecho — A circuit in weather radar that reverses signal strength above a specified intensity level. In this mode, there is a void on the scope where echoes are most intense, and a turbulent cloud area appears as either dark or colored. The width of this… …   Aviation dictionary

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