Process and apparatus for monitoring weather phenomena
First Claim
1. A process for the monitoring of weather phenomena by means of analysis of movements of air masses whereby said movements are determined by(a) receiving the EM radiation generated in the atmosphere in the frequency range between 3kHz and 100kHz by means of at least one directionally selective VLF receiving antenna installation,(b) splitting said radiation into essentially two noncontiguous frequency bands,(c) determining separately the atmospheric event frequencies occurring within said frequency bands,(d) comparing these event frequencies with each other, and(e) displaying the result using at least two indication levels indicating the presence of said atmospheric event frequencies.
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Abstract
A process and apparatus for the day-or-night monitoring of weather phenomena by means of the analysis of the movements of air masses, wherein the movements are determined by monitoring and receiving the multi-band VLF electromagnetic radiation generated in the atmosphere with directionally selective receivers. The received frequencies are then compared with values which have been correlated with atmospheric events. Means are provided for displaying the predictive results for events occurring up to 500 km away from the VLF receivers--typically updatable within seconds--in at least two stages according to the (near or far) range desired or the type of electrical polarization.
41 Citations
22 Claims
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1. A process for the monitoring of weather phenomena by means of analysis of movements of air masses whereby said movements are determined by
(a) receiving the EM radiation generated in the atmosphere in the frequency range between 3kHz and 100kHz by means of at least one directionally selective VLF receiving antenna installation, (b) splitting said radiation into essentially two noncontiguous frequency bands, (c) determining separately the atmospheric event frequencies occurring within said frequency bands, (d) comparing these event frequencies with each other, and (e) displaying the result using at least two indication levels indicating the presence of said atmospheric event frequencies.
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9. A process for the monitoring of weather phenomena by means of the analysis of movements of air masses in the near range (up to a distance of 150 km from the measuring station) whereby said movements are determined by
(a) receiving the vertically polarized EM radiation in the atmosphere which is essentially in the frequency band of 15-30 kHz by means of a directionally selective VLF receiving installation, (b) determining the event frequencies and discriminating them from static-term waveforms, which are essentially smooth and with the first segment of high amplitude and any lower amplitude in a second segment of the waveform, (c) determining the amplitude of said received VLF waveforms, and (d) displaying the event frequencies and the static-term waveforms as at least two indication levels.
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13. An apparatus for monitoring weather phenomenon by analyzing movements of air masses, comprising:
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(a) at least two directionally selective antenna installations wherein the first antenna installation is set to receive vertically polarized EM radiation in the frequency band of 25-30 kHz and the second antenna installation is set to receive horizontally polarized EM radiation in a frequency band of 3-100 kHz, (b) at least two antenna-corresponding (pre-)amplifiers, (c) at least two parallel processing channels associated with the two antenna installations, each comprising at least one variable attenuator/amplifier, circuits for the suppression of interference signals form technological sources, and logic circuits for the determination of the event frequencies, and (d) a display means. - View Dependent Claims (14, 15, 16, 17, 18, 21, 22)
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Specification