Same as aneroid barometer. Holostelic means wholly made of solids, while aneroid means devoid of liquid.

Instrument for measuring the depth to which the soil is frozen.

The maximum difference in output for any given input (within the specified range) when the value is approached first with increasing, and then with decreasing, input signals. Caused by energy absorption in the elements of the measuring instrument. Usually ...

Wind with a speed between 7 and 10 knots (8 and 12 mph), Beaufort scale number 3.

A vent used with pressure sensors to reduce the effect of wind on the pressure inlet. It is normally mounted remotely and connected to the sensor using airtight tubing.

Thermometer for measuring the temperature in the soil at different depths.

The lowest value of a measured quality at which a sensor responds. Compare to tracking.

A sudden brief increase in the speed of the wind, followed by a lull or slackening. Compare to peak gust.

A self-recording psychrometer.

modulated radiosonde-A radiosonde which transmits the indications of the meteorological sensing elements in the form of pulses spaced in time. The meteorological data are evaluated from the intervals between the pulses. Also called timeinterval radiosonde ...

Having a specific relationship to a time base or clock. In synchronous communications, data characters are sent according to a timing signal which synchronizes the two communicating devices.

The sum of solar and terrestrial radiation.

A hypothetical temperature characterized by a complete absence of heat and defined as 0 K, -273.15 C, or -459.67 F.

Temperature based on an absolute scale.

In radiometry, a measure of the intrinsic radiant intensity emitted by a radiator in a given direction.

An early and once universal name for the mercury barometer.

Very small precipitation drops (diameters less than 0.5 mm) that appear to float with air currents while falling in an irregular path. Unlike fog droplets, drizzle falls to the ground.

A measure of the intrinsic luminous intensity emitted by a source in a given direction. Luminance is a measure only of light. The comparable term for electromagnetic radiation in general is radiance.

Any horizontal wind velocity tangent to the contour line of a constant pressure surface (or to the isobar of a geopotential surface) at the point in question.

The transducer's output when the maximum sensed value is applied to the transducer's input. For example, the F.S. output of a 4-20 mA transmitter is 20 mA, whereas its span is only 16mA.