Definitions for f region
f region

Princeton's WordNetRate this definition:0.0 / 0 votes

1. 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

WikipediaRate this definition:0.0 / 0 votes

1. 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.

ChatGPTRate this definition:0.0 / 0 votes

1. 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.

WikidataRate this definition:0.0 / 0 votes

1. 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

1. • Ionosphere
   • Region

How to pronounce f region?

1. Alex

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   David

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   Mark

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   Daniel

   British

   Libby

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   Mia

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   Australian

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How to say f region in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of f region in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of f region in Pythagorean Numerology is: 2

Examples of f region in a Sentence

1. Scott Swift:

   There are forces of instability at play in the region, and that's generating uncertainty, i wish I had a crystal ball that I look into the future and see. I am concerned about the forces of destabilization that appear to be more current here in the theater.

2. Renad Mansour:

   Prime Minister Abadi's the favorite to win, and Prime Minister Abadi's trying to pursue this Iraq-wide strategy, prime Minister Abadi came to the Kurdistan region and Prime Minister Abadi came to Sunni areas in Nineveh and Anbar and now Prime Minister Abadi's in the south, Prime Minister Abadi's trying to cover the whole country.

3. Karl Erjavec:

   The situation in the western Balkans is rather obscure, not stable, and... it will be necessary to ensure that there is dialogue to strengthen stability in this region.

4. Olivier Mukisya:

   We confirm this sad news. A group of armed men attacked our positions in the region of Nyamitwitwi in the middle of Virunga National Park.

5. Javad Zarif:

   Unfortunately, Saudi Arabia have had the illusion that backed by their Western allies, they could push Iran out of the equation in the region.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=f region
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/F_Region
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=f region