Anagram & Information om | Engelska ordet VLF

Exempel på hur man kan använda VLF i en mening

• Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively.
• At lower frequencies in the MF, LF, and VLF bands, diffraction allows radio waves to bend over hills and other obstacles, and travel beyond the horizon, following the contour of the Earth.
• It is believed to be generated by a Doppler-shifted cyclotron interaction between anisotropic distributions of energetic (> 40 keV) electrons and ambient background VLF noise.
• The mast can either support radio antennas (for VHF, UHF and other microwave bands) mounted at its top, or the entire structure itself can function as a mast radiator antenna (for VLF, LF, MF).
• This precludes submarines from transmitting VLF, but a relatively simple antenna (usually a long trailing wire) will suffice for reception.
• Anstey gained prominence as the lead speaker at meetings of the VLF, which collapsed in 1900 "amid political bickering and personal recriminations".
• Modern enthusiasts often monitor the transmissions using a PC with a coil connected to the soundcard input and FFT analysis software, or a short-wave receiver with an upconverter, or any of several receivers designed to receive VLF transmissions directly.
• The last remaining operable Alexanderson alternator is at the VLF transmitter Grimeton in Sweden and was in regular service until 1996.
• Between 1994 and 1996, Tourville and De Grasse were refitted with the modern SLASM anti-submarine system, and active Very Low Frequency (VLF) sonar.
• The discovery of the plasmasphere grew out of the scientific study of whistlers, natural phenomena caused by very low frequency (VLF) radio waves.
• This was done utilizing various frequencies in the ELF, VLF, LF, MF, HF, VHF, UHF, SHF and EHF spectrums.
• Scientists on the ground can use this enhancement to detect solar flares; by monitoring the signal strength of a distant VLF transmitter, sudden ionospheric disturbances (SIDs) are recorded and indicate when solar flares have taken place.
• The VLF Force 1 is a premium sports car manufactured by VLF Automotive, a company formed by Bob Lutz and Gilbert Villareal, who were later joined by Henrik Fisker as lead designer.
• Energy sources in the atmosphere, such as lightning, can produce sounds (sferics, tweeks, and whistlers) in the very low frequency (VLF) radio band.
• Russia also operates several military bases and radars in Belarus which includes the Hantsavichy Radar Station an early warning radar which is run by the Russian Aerospace Defence Forces and the Vileyka VLF transmitter.
• Ongoing physical science research programs includes the Antarctic Magnetospheric and Ionospheric Ground-based Observation (AMIGO), and Super Dual Auroral Radar Network (SuperDARN), Antarctic Research on Cosmic Rays (ANOKS), very low frequency (VLF) radio research and various International Polar Year projects.
• Kinter, School of Electrical Engineering, Cornell University, Ithaca, NY, who carried out research at Siple Station on VLF wave emissions and interaction in 1980-81.
• When those VLF waves hit the electrons with the same frequency as an electron's gyrofrequency, the electron exits the radiation belt and "precipitates" (because it will not be able to re-enter the radiation belt) throughout the Earth's atmosphere and ionosphere.
• In his career spanning over three decades — including over two decades at the Indian Space Research Organisation's Vikram Sarabhai Space Centre — he has done extensive research in areas including the physics of lightning discharge, ionospheric physics, magnetospheric physics, VLF and ELF wave propagation, electrostatics of launch vehicles, electrostatic charging of communications satellites, EMI/EMC and lightning protection for launch vehicles.
• Other objectives were: (1) to determine how wave propagation from both ground and magnetospheric sources was affected by field-aligned plasma structures such as the plasmapause and ducts of enhanced ionization, (2) to use the wave data to describe the structure of the plasmapause and the distribution of ionization along field-aligned ducts, and (3) to study the effects of Earth power-line radiation and other VLF wave activity.

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