9 28 Lightning Detection And Location Detection Of Lightning And Sensing Its Intensity Is An Important Component Of Wea 1 (93.66 KiB) Viewed 21 times
9 28 Lightning Detection And Location Detection Of Lightning And Sensing Its Intensity Is An Important Component Of Wea 2 (37.56 KiB) Viewed 21 times
9.28 Lightning detection and location. Detection of lightning and sensing its intensity is an important component of weather prediction. National and global networks of lightning sensors fulfill this need. The electromagnetic radiation emitted during the lightning strike propagates at the speed of light and is detected by relatively simple antennas. In ground-based systems, the coordinates of a lightning strike are found by trilateration. The simplest algorithms rely on the coordinates of fixed receiving antennas and record of the time a lightning signal is detected. Consider a system that uses the sig- nals from three receiving antennas as follows: antenna 1 at coordinates (41.7752, -100.0933), antenna 2 at coordinates (41.2688, -99.5933), and antenna 3 at coordinates (40.6045, -99.8142). The electromagnetic signal from a lightning strike is received by antenna 1 at time t₁ = to + 257 µs, by
antenna 2 at time t₂ = to + 103 µs, and by antenna 3 at time t3 = to + 168 µs. Assume that another receiving antenna is located at a reference point (40.7638, -100.5933) and the signal arrives at the reference antenna at time to = 0. Calculate the coordinates of the lightning strike from these data in DD format and in DDS format. For calculation purposes use 1' = 1.85 km.
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