Lightning Properties Determined From Single Station WidebandElectric Field Measuremnts
Lightning Properties Determined From Single Station WidebandElectric Field Measuremnts
批准号:
8807449
负责人:
Martin Uman
金额:
$14.91万
依托单位:
依托单位国家:
美国
项目类别:
Continuing grant
财政年份:
1988
资助国家:
美国
项目状态:
已结题
起止时间:
1988-10-15 至 1991-09-30
中文摘要
将对三次风暴期间发生的闪电电场的模拟磁带记录进行分析,以确定(1)与持续电流的开始(2)与云和地面放电中的k过程(3)与地面放电的初步击穿(4)与云的初始部分相关的电场脉冲的发生时间和特征(5)地面放药时带飞镖和阶梯引线。这些数据的独特之处在于,(1)记录在模拟磁带上的100个地闪(约350个斯托克)的场已经被两台或多台电视摄像机精确定位;(2)这些磁带上的回波场已经被事先分析过,并公布了结果,以保证信号是“正常的”和高质量的。
英文摘要
Analog tape records of the lightning electric fields which occurred during three storms will be analyzed for the time-of- occurrence and characteristics of electric field pulses associated (1) with the initiation of continuing current (2) with K-processes in both cloud and ground discharges (3) with preliminary breakdown in ground discharges (4) with the initial portion of cloud discharges, and (5) with dart and stepped leaders in ground discharges. The unique aspects of these data, already in hand, are (1) that 100 ground flashes (about 350 stokes) whose fields are recorded on the analog tapes have already been accurately located by two or more television cameras and (2) that the return stroke fields on these tapes have been previously analyzed and the results published providing assurance that the signals are "on-scale" and of good quality.
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会议论文
U.S.-Switzerland Cooperative Research in the Modeling of Lightning
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批准号:9123484
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项目类别:Standard Grant
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资助金额:$1.35万
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财政年份:1992
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负责人:Martin Uman
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依托单位:
SGER: Measurement of the Horizontal Component of the Electric Field from Very Close Lightning
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批准号:9105707
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项目类别:Standard Grant
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资助金额:$2.98万
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财政年份:1991
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负责人:Martin Uman
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依托单位:
Determination of Lightning Properties from Single Station Wideband Electric Field Measurements
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批准号:9014085
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项目类别:Continuing grant
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资助金额:$31.8万
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财政年份:1991
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负责人:Martin Uman
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依托单位:
U.S.-Italy Cooperative Research: Lightning Models and Lightning-Induced Voltages on Power Lines
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批准号:8912477
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项目类别:Standard Grant
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资助金额:$1.76万
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财政年份:1990
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负责人:Martin Uman
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依托单位:
US-Mexico Collaborative Research: Lightning Effects on PowerDistribution Lines
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批准号:8815332
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项目类别:Standard Grant
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资助金额:$1.78万
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财政年份:1989
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负责人:Martin Uman
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依托单位:
Capital Equipment for Lightning Research
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批准号:8405073
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项目类别:Standard Grant
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资助金额:$8.82万
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财政年份:1984
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负责人:Martin Uman
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依托单位:
Lightning Physics
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批准号:8217036
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项目类别:Continuing grant
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资助金额:$58.43万
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财政年份:1983
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负责人:Martin Uman
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依托单位:
Measurement of Characteristics of Lightning: Currents and Electric Magnetic Fields
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批准号:8103349
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项目类别:Standard Grant
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资助金额:$1.58万
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财政年份:1981
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负责人:Martin Uman
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依托单位:
Lightning and Thunderstorms - Further Trip Studies
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批准号:8103013
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项目类别:Continuing grant
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资助金额:$9.24万
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财政年份:1981
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负责人:Martin Uman
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依托单位:
Lightning Return Stroke Properties From Electric and Magnetic Field Measurements
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批准号:7902627
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项目类别:Continuing grant
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资助金额:$36.84万
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财政年份:1979
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负责人:Martin Uman
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依托单位:
Lightning Properties From Electric and Magnetic Field Measurements
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批准号:7601454
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项目类别:Continuing grant
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资助金额:$22.69万
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财政年份:1976
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负责人:Martin Uman
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依托单位:
海外基金