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

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

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. Torbjorn Soltvedt:

   Today’s attack comes only days after Iran-backed groups threatened to strike against Abu Dhabi in response to alleged Emirati interference in Iraqi politics, the attack is another reminder of the highly complex missile and drone threat faced by the UAE and the region’s other main oil producers.

2. Jimmy Borah:

   The Greater Mekong region is a magnet for the world’s conservation scientists because of the incredible diversity of species that continue to be discovered here, these scientists, the unsung heroes of the planet, know they are racing against time to ensure that these newly discovered species are protected and saved.

3. Pope Francis:

   I ask him, the Saviour of the world, to look upon our brothers and sisters in Iraq and Syria, who for too long now have suffered the effects of ongoing conflict, and who, together with those belonging to other ethnic and religious groups, are suffering a brutal persecution, may Christmas bring them hope, as indeed also to the many displaced persons, exiles and refugees, children, adults and elderly, from this region and from the whole world.

4. Joseph Humire:

   The Maduro regime is a strategic ally of Beijing, so in some sense, this was expected, however, this is also happening elsewhere in the region. In a northern province of Argentina, called Jujuy, ZTE has sold a surveillance system with 600 cameras worth around $30 million, in neighboring Uruguay, theyve donated more than 2,000 surveillance cameras to reportedly monitor the borders with Argentina and Brazil. In Brazil, Huawei equipment is embedded in government infrastructure and some agencies,like itsCentral Bank.

5. John Boehner:

   It would be naïve to suggest the Iranian regime will not continue to use its nuclear program, and any economic relief, to further destabilize 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