From Glossary of Meteorology


  1. The difference between the maximum and minimum of a given set of numbers; in a periodic process it is twice the amplitude, that is, the wave height.

  2. The distance between two objects, usually an observation point and an object under observation.

  3. A maximum distance attributable to some process, as in visual range or the range of an aircraft.

  4. The difference between high and low water in a tidal cycle.

    Ranges greater than 4 m are sometimes termed macrotidal and those less than 2 m are termed microtidal. Intermediate ranges are termed mesotidal.

  5. In radar, lidar, and sodar, the radial distance measured outward from the location of the transmitter; ordinarily the distance to a target.