The lowest value of a measured quality at which a sensor meets its accuracy specification.

A thermopile used in some types of radiation instruments. See solarimeter.

A type of cistern barometer in which the level of mercury in the cistern is adjusted to the zero point of the scale before each reading.

A warm, dry wind on the lee side of a mountain range, the warmth and dryness due to adiabatic compression upon descent.

Lowest altitude in the atmosphere over a given location at which the air temperature is 0

Same as water year.

The mean difference between the readings of a given instrument and those of a standard instrument.

A rain gauge which is placed under trees or foliage to determine the rainfall in that location. By comparing this catch with that from a rain gauge set in the open. the amount of rainfall which has been intercepted by foliage can be determined.

A thermometer, invented by James Six in 1782, which simultaneously indicates the maximum and minimum temperatures attained during a given interval of time. A U-tube min/max thermometer

In general. the severe wind of an intense tropical cyclone (hurricane or typhoon). The term has no further technical connotation, but, unfortunately, is easily conftlsed with the strictly defined hurricane-force wind,

The study of waters (including oceans, lakes, and rivers) embracing either: (a) their physical characteristics, from the standpoint of the oceanographer or limnologist; or (b) the elements affecting safe navigation, from the point of view of the mariner. ...

Of equal or constant pressure, with respect to either space or time.

A buoyant balloon rising freely in the atmosphere, as opposed to a captive balloon.

See constant-level balloon.

The point (physical and/or electrical) where two distinct data processing elements meet.

A mercury barometer in which the tube is U-shaped and the upper and lower mercury surfaces have the same diameter.

A seasonal wind of persistent direction, characterized by a pronounced change in direction between seasons.

The most common of the principal rainbow phenomena, which appears as an arc of about 42

A line drawn through all points on a map having the same amount of cloudiness.

An addition to a rawinsonde system which allows determination of the slant range to the radiosonde.