sv: Low Level Virtual Machine

sv: Frederick Low

sv: Low fantasy

sv: Maximum Usable Frequency

sv: Very High Frequency

sv: High Frequency Active Auroral Research Program

sv: Radio Frequency Identification

During this time Very Low Frequency ( 3 – 30 kHz ) signals will be reflected by the D layer instead of the E layer, where the increased atmospheric density will usually increase the absorption of the wave and thus dampen it.

The first is through VLF ( Very Low Frequency ) radio waves launched into the magnetosphere.

Following public concern, the U. S. Defense department was ordered by the 9th Circuit Court to strictly limit use of its Low Frequency Active Sonar during peacetime.

* 140A-Equipment Technical Design Standards For Common Long Haul / Tactical Radio Communications In The Low Frequency Band And Lower Frequency Bands

A gap between the inner and outer Van Allen belts, sometimes called safe zone or safe slot, is caused by the Very Low Frequency ( VLF ) waves which scatter particles in pitch angle which results in the gain of particles to the atmosphere.

Elves is an acronym for Emissions of Light and Very Low Frequency Perturbations from Electromagnetic Pulse Sources.

* An induction magnetometer, provided by the University of Tokyo, that measures the changing geomagnetic field in the Ultra Low Frequency ( ULF ) range of 0 – 5 Hz.

Magnetometers used in the Earth sciences are called geophysical surveys, a term that also embraces a wide range of other geophysical techniques including gravity, seismic refraction, seismic reflection, electromagnetics ( EM ), induced polarisation ( IP ), magneto-tellurics ( MT ), controlled source magneto-tellurics ( CSAMT ), sub-audio magnetics ( SAM ), mise-a-la-masse, resistivity, self Potential ( SP ) and Very Low Frequency ( VLF ).

Until 1995, there was the Silver Creek Communications Annex 41 ° 20 ' 46. 00 " N 97 ° 43 ' 18. 18 " W a station of the Survivable Low Frequency Communications System of the United States Air Force.

* A Blue Gene / P system is the central processor for the Low Frequency Array for Radio astronomy ( LOFAR ) project in the Netherlands and surrounding European countries.

* Multichannel support-up to 5 full range audio channels and an LFE-channel ( Low Frequency Enhancement channel )

These tags are commonly known as LFID's or LowFID's ( Low Frequency Identification ).

* LFO-A Low Frequency Oscillator may or may not be voltage-controlled.

* Survivable Low Frequency Communications System ( SLFCS )

Before the bass management system there is a Low Frequency Effects ( LFE ) channel.

( Movie and DVD soundtracks can be mixed down to four or more tracks, as needed, the most common being five tracks, with an additional Low Frequency Effects track, hence the " 5. 1 " surround sound most commonly available on DVDs.

Extremely Low Frequency ( ELF ) –

* Jacobsen, Trond, " ZEVS, the Russian 82 Hz ELF transmitter: An Extrem Low Frequency transmission-system, using the real longwaves " ALFLAB, Halden, Norway.

da: Extremely Low Frequency

de: Extremely Low Frequency

In addition, terrestrial radio positioning systems utilizing an LF ( Low Frequency ) switched packet radio network were also used as an alternative to GPS based systems.

They also maintain the Project's clandestine Extremely Low Frequency systems that very slowly accumulate Prime Base's messages, such as briefings, for teams to read when they awaken — thus counterbalancing the minuscule data rate.

While there are currently no results, there are a few projects underway which hope to make headway in this area in the near future, such as the Precision Array for Probing the Epoch of Reionization ( PAPER ), Low Frequency Array ( LOFAR ), Murchison Widefield Array ( MWA ), Giant Metrewave Radio Telescope ( GMRT ), and the Large-Aperture Experiment to Detect the Dark Ages ( LEDA ).