Sferics receiver: Difference between revisions

Revision as of 15:05, 20 February 2012

sferics receiver

(Also called lightning direction finder.) An instrument that measures, electronically, the direction of arrival, intensity, and rate of occurrence of atmospherics; a type of radio direction finder, it is most commonly used to detect and locate cloud-to-ground lightning discharges from distant thunderstorms.

In its simplest form the instrument consists of two orthogonally crossed antennas that measure the electromagnetic field changes produced by a lightning discharge and determine the direction from which the changes arrived. Negative and positive polarity cloud-to-ground discharges can be distinguished. Cloud-to-cloud discharges can be distinguished based on characteristics of the received signal, and the geometry of nearby discharge channels may be determined.
See also narrow- sector recorder, lightning detection network.

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-<div class="definition"><div class="short_definition">(<br/>''Also called'' lightning direction finder.) An instrument that measures, electronically,  the direction of arrival, [[intensity]], and rate of occurrence of [[atmospherics]]; a type of [[radio direction  finder]], it is most commonly used to detect and locate [[cloud-to-ground lightning discharges]]  from distant thunderstorms.</div><br/> <div class="paragraph">In its simplest form the instrument consists of two orthogonally crossed [[antennas]] that measure  the [[electromagnetic field]] changes produced by a [[lightning discharge]] and determine the direction  from which the changes arrived. Negative and positive [[polarity]] cloud-to-ground discharges can  be distinguished. [[Cloud-to-cloud discharges]] can be distinguished based on characteristics of the  received [[signal]], and the geometry of nearby discharge channels may be determined. <br/>''See also'' [[narrow-  sector recorder]], [[lightning detection network]].</div><br/> </div>
+<div class="definition"><div class="short_definition">(''Also called'' lightning direction finder.) An instrument that measures, electronically,  the direction of arrival, [[intensity]], and rate of occurrence of [[atmospherics]]; a type of [[radio direction  finder]], it is most commonly used to detect and locate [[cloud-to-ground lightning discharges]]  from distant thunderstorms.</div><br/> <div class="paragraph">In its simplest form the instrument consists of two orthogonally crossed [[antennas]] that measure  the [[electromagnetic field]] changes produced by a [[lightning discharge]] and determine the direction  from which the changes arrived. Negative and positive [[polarity]] cloud-to-ground discharges can  be distinguished. [[Cloud-to-cloud discharges]] can be distinguished based on characteristics of the  received [[signal]], and the geometry of nearby discharge channels may be determined. <br/>''See also'' [[narrow-  sector recorder]], [[lightning detection network]].</div><br/> </div>
 </div>