What does f region mean?
Definitions for f region
f region
This dictionary definitions page includes all the possible meanings, example usage and translations of the word f region.
Princeton's WordNet
Appleton layer, F layer, F regionnoun
the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission
Wikipedia
F region
The F region of the ionosphere is home to the F layer of ionization, also called the Appleton–Barnett layer, after the English physicist Edward Appleton and New Zealand physicist and meteorologist Miles Barnett. As with other ionospheric sectors, 'layer' implies a concentration of plasma, while 'region' is the volume that contains the said layer. The F region contains ionized gases at a height of around 150–800 km (100 to 500 miles) above sea level, placing it in the Earth's thermosphere, a hot region in the upper atmosphere, and also in the heterosphere, where chemical composition varies with height. Generally speaking, the F region has the highest concentration of free electrons and ions anywhere in the atmosphere. It may be thought of as comprising two layers, the F1 and F2 layers. The F-region is located directly above the E region (formerly the Kennelly-Heaviside layer) and below the protonosphere. It acts as a dependable reflector of HF radio signals as it is not affected by atmospheric conditions, although its ionic composition varies with the sunspot cycle. It reflects normal-incident frequencies at or below the critical frequency (approximately 10 MHz) and partially absorbs waves of higher frequency.
ChatGPT
f region
An "f region" typically refers to the highest region in the ionosphere, a part of Earth's atmosphere. This region is known for reflecting high and medium frequency radio waves and plays a crucial role in long-distance radio communication systems. It is divided into two layers - F1 and F2.
Wikidata
F region
The F region of the ionosphere is home to the F layer of ionization, also called the Appleton layer, after the English physicist Edward Appleton. As with other ionospheric sectors, 'layer' implies a concentration of plasma, while 'region' is the area that contains the said layer. The F region contains ionized gases at a height of around 150–800 km above sea level, placing it in the Earth’s thermosphere, a hot region in the upper atmosphere, and also in the heterosphere, where chemical composition varies with height. Generally speaking, the F region has the highest concentration of free electrons and ions anywhere in the atmosphere. It may be thought of as comprising two layers, the F1-and F2-layers. The F-region is located directly above the E region and below the protonosphere. It acts as a dependable reflector of radio signals as it is not affected by atmospheric conditions, although its ionic composition varies with the sunspot cycle. It reflects normal-incident frequencies at or below the critical frequency and partially absorbs waves of higher frequency. The F region is the region of the ionosphere which is very important for HF radio wave propagation. This F region is very anomalous in nature.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of f region in Chaldean Numerology is: 4
Pythagorean Numerology
The numerical value of f region in Pythagorean Numerology is: 2
Examples of f region in a Sentence
This shows an attempt to take advantage of a fabricated crisis to cover up the realities of the region which include the occupation and repression of the people of Palestine and the violation of their rights.
Worsening conditions are driving growing numbers towards Europe and further afield, but the overwhelming majority remain in the region.
If the export facilities in the region are not back up and running at normal capacity by this time ... we will essentially be attaching a garden hose to a fire hydrant.
Let me just say that one concern we share is that if this event is taking place, including with a military parade, the concern is, is this really sending a message of reconciliation? is this going to be an event which is going to be the basis for a more peaceful region and world, or is it going to stir resentments which could go in the other direction?
It is only after the last interglacial [ period ] with the return of cooler conditions that we have definitive evidence for Neanderthals moving into the region, the footprints, therefore, most likely represent humans, or Homo sapiens.
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"f region." Definitions.net. STANDS4 LLC, 2024. Web. 16 Jun 2024. <https://www.definitions.net/definition/f+region>.
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