Radar Meteorology Glossary

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I

Index of Refraction

Ratio of velocity of electromagnetic energy in a vacuum to that in a specified medium.

Insects

Problems caused to radar products

Insects disperse microwaves. Insect echoes cannot be removed by the Doppler filter because of their moving with wind. Insects can, however, be useful as they provide Doppler wind soundings from clear air boundary layer.

Example Image

Insects

Isodop

A contour of constant Doppler radial velocity.

Isotropic Radiator

A radiator which transmits equal energy in all directions.