A protocol similar to RS232 which permits data interchange on multidrop networks of up to 32 nodes using a single twisted pair cable. In order for this protocol to be used, each device on a network must have some level of intelligence in order establish o ...

Same as altimeter setting.

A measure, proposed by Angstrom, of the precipitation effectiveness of a region.

A unit of illuminance or illumination equal to one lumen per foot'. This is the illuminance provided by a light source of one candle at a distance of one foot.

A river gauge in which a weight suspended on a wire is lowered to the water surface from a bridge or other overhead structure to measure the distance from a point of known elevation to the water surface.

An instrument which measures the rate of evapotranspiration. It consists of a vegetation soil tank so designed that all water added to the tank and all water left after evapotranspiration can be measured.

Physical equipment used in data processing. Compare to firmware, software.

A graduated scale placed in a position so that the stage of a stream may be read directly from it. Staff gauges may be placed on bridge piers or pilings, etc., or placed on specially constructed supports.

Any and all forms of water particles, liquid or solid, that fall from the atmosphere and reach the ground.

A device used to hold liquid-in-glass maximum and minimum thermometers in the proper recording position inside an instrument shelter, and to permit them to be read and reset. See Townsend support.

By international agreement, a period during which greatly increased observation of world-wide geophysical phenomena is undertaken through the co-operative effort of participating nations. July 1957-December 1958 was the first such year. However, precedent ...

Same as pitot tube.

A pyrheliometer of the bimetallic type used to measure the intensity of direct solar radiation.

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

A recording anemometer.

Random Access Memory. The memory of a computer which can be read and written into at any location without passing through preceding locations.

The humidity transducinu element in a Diamond-Hinman radiosonde. Also called electrolytic strip.

An aviation weather forecast for a specific flight.

Water vapor content of the air. See absolute humidity, dew point, mixing ratio, relative humidity, specific humidity.

A device that combines several separate communications signals into one and outputs them on a single line.