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| Radial Vel 124nm Elev=0.5 deg 1 km²/pixel GSP: Greer SC 34.88N 82.22W 10/18/99 00:43 UTC Clear Mode VCP 32 Max: -71 kts +58 kts |
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NEXRAD Radial Velocity
NEXRAD is a Doppler radar, and it can track the velocity and direction of targets moving relative to the radar station. This is called the radial velocity. The following radial velocity image shows movement of the bird and insect targets from the previous base reflectivity image. From the radar tutorial remember that the green hues in the scale represent targets moving toward the radar, and the red hues in the scale represent targets moving away from the radar. Notice the line of grayish hues representing velocities close to zero that divides the green and red hues. Think of this line as an axis perpendicular to the direction of target movement. In this case see that most targets are moving south and south-southeast at 30-50 knots (the brightest greens and reds).
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