The effect of limited equipment resolution on the spectra recorded by previous workers is also discussed.doi:10.1016/0021-9169(70)90111-XR. BarrElsevier B.V.Journal of Atmospheric and Solar-Terrestrial PhysicsBarr, R., 1970a. The ELF and VLF amplitude spectrum of atmo- spherics with ...
frequency range 1-10 kHz/ A9420 Ionosphere B5200 Electromagnetic waves, antennas and propagation B5210C Radiowave propagation B7710B Atmospheric, ionospheric and magnetospheric techniques and equipmentA study of ELF and VLF propagation has been made for radio waves travelling in the South-North ...
Amplitudes at the output of different frequency filters in the ELF/VLF range, connected to electric or magnetic components, were stored in a file. This file is organized as functions of three parameters: Deltat, the difference between the time of the earthquake and the time of the satellite ...
you can take the meter with you when you are out, buying new equipment for the house in order to make sure when and how much EMF/EMR the new equipment will emit (for
EMFs are produced by power lines, electric wiring, and electric equipment and appliances. The frequency of EMFs is measured in hertz (Hz, or cycles per second). People are exposed to both electric and magnetic fields, but scientists are most concerned about magnetic fields. This fact sheet ...
Construction and building of new receiving equipment (amplifiers, filters, spectrum-analyzers etc) has taken very much time during the first year of the contract period. In spite of this fact much data have already been gathered. In Section 5 the research plans for the next year are described...
Airborne EquipmentRadio TransmittersSignal TransmissionThe principal uses of any portion of the radio spectrum are for navigation and communications. Many vlf transmitters are now phase stabilized so that they can be used for navigation as well as signals especially transmitted for navigation, such as ...
The use of the new, highly sensitive magnetometric equipment allowed signals with an amplitude of a few femtoteslas to be recorded at a distance of up to 2000 km from the source. Analysis of the measurement results discovered substantial differences in the amplitude-phase characteristics of the ...
In July 1972, three of the sferics recorders were operated to obtain data for sferics originating in Colorado and received in California and Hawaii. The equipment is described, and derived daytime and nighttime attenuation rates in the elf band are presented. (Author)Martin, J. N...
Recordings of ELF/VLF radio signals were made, as a contribution to the International Magnetospheric Study, in Iceland (17 August to 5 September 1977) and Norway (21 October to 15 December 1977; and 11 January to 27 February 1978) by the Space Radio Physics group. The equipment used at ...