Single-station narrowband ranging of active storm cells without lightning-type discrimination
2009 (English)In: Journal of Atmospheric and Solar-Terrestrial Physics, ISSN 1364-6826, E-ISSN 1879-1824, Vol. 71, no 8-9, 911-922 p.Article in journal (Refereed) Published
We present a statistical technique for ranging the edges of active storms cell using a very simple narrowband receiver tuned to 1 MHz (the MW band in radio, just below HF frequencies). We show that a principle based on the "30-30 rule" can be used to define practical warning levels. From the measurements carried out in Finland, we show that the narrowband source intensities of cloud-to-ground lightning vary log-normally; this results in a ranging uncertainty of about 20%, which can be reduced if a suitable floating average is used. Based on one storm, we suggest that the differences between intra-cloud and ground-to-cloud signals at 1 MHz are small enough to make an IC-CG discrimination. Eliminating such a discrimination allows all lightning impulses to be used in the range and improves the accuracy, since more flashes are then available as inputs into the distance-estimation algorithm. Although the system is only validated against a single storm, we provide definitions by which this and other narrowband detectors could be independently verified; existing narrowband devices have not been verified in this manner, due in part to a lack of such standardized definitions.
Place, publisher, year, edition, pages
2009. Vol. 71, no 8-9, 911-922 p.
Lightning, Narrowband, Electromagnetic, Radiation
Earth and Related Environmental Sciences Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-113154DOI: 10.1016/j.jastp.2009.03.005ISI: 000267572600015ISBN: 1364-6826OAI: oai:DiVA.org:uu-113154DiVA: diva2:289864