|
Summits On The Air
Summits On The Air (SOTA) is an amateur radio operating award program launched in Great Britain in 2002 by John Linford. The aim of SOTA is to encourage licensed amateur radio operators to operate temporarily from mountainous locations using any method of travel including hiking, mountain climbing, and cycling while operating their amateur radio station from the summits of hills and mountains. In addition to getting operators out into the field the program encourages others to listen in to the transmissions from these stations and send in reports. In areas that are not remote or difficult to access some SOTA activations serve as community outreach events. The program now has over 24,000 participants world wide, about 7,000 in the United States. Amateur radio operators who set up stations on mountain peaks are known as activators, and other amateur radio operators who complete contacts with them are called chasers. Points are given to both activators and chasers based on how high the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Radio Operating Award
An amateur radio operating award is earned by an amateur radio operator for establishing two-way communication (or "working") with other amateur radio stations. Awards are sponsored by national amateur radio societies, radio enthusiast magazines, or amateur radio clubs, and aim to promote activity on the amateur radio bands. Each award has its own set of rules and fees. Some awards require the amateur radio operator to have contacted other stations in a certain number of countries, Maidenhead grid locators, or counties. Because amateur radio operators are forbidden by regulation to accept financial compensation for their on-air activity, award recipients generally only receive a certificate, wooden plaque, or a small trophy as recognition of their award. Most amateur radio operating awards require that the applicant submit proof, such as QSL cards, of the contacts which satisfy the requirements of the award. There are thousands of operating awards available. The most popu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Line-of-sight Propagation
Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves travel in a direct path from the source to the receiver. Electromagnetic transmission includes light emissions traveling in a straight line. The rays or waves may be diffracted, refracted, reflected, or absorbed by the atmosphere and obstructions with material and generally cannot travel over the horizon or behind obstacles. In contrast to line-of-sight propagation, at low frequency (below approximately 3 MHz) due to diffraction, radio waves can travel as ground waves, which follow the contour of the Earth. This enables AM radio stations to transmit beyond the horizon. Additionally, frequencies in the shortwave bands between approximately 1 and 30 MHz, can be refracted back to Earth by the ionosphere, called skywave or "skip" propagation, thus giving radio transmissions in this range a potentially global reach. However, at frequencies above ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Radio Operating Awards
An amateur () is generally considered a person who pursues an avocation independent from their source of income. Amateurs and their pursuits are also described as popular, informal, autodidacticism, self-taught, user-generated, do it yourself, DIY, and hobbyist. History Historically, the amateur was considered to be the ideal balance between pure intent, open mind, and the interest or passion for a subject. That ideology spanned many different fields of interest. It may have its roots in the ancient Greek philosophy of Amateur sports, amateur athletes competing in the Olympic Games, Olympics. The ancient Greek citizens spent most of their time in other pursuits, but competed according to their natural talents and abilities. The "gentleman amateur" was a phenomenon among the gentry of United Kingdom, Great Britain from the 17th century until the 20th century. With the start of the Age of Enlightenment, Age of Reason, with people thinking more about how the world works around th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parks On The Air
Parks On The Air (POTA) is an amateur radio operating award program started in 2010 with its nonprofit organization being founded in 2018 that encourages amateur radio operators to operate in a variety of parks and public lands as a portable station. Activations can take place during other events such as Field Day. The POTA movement saw a large surge of interest in 2016 after the ARRL hosted a one year activation event called NPOTA. The event was created to help celebrate the 100th anniversary of the National Park System and was designed to encourage amateur radio operators to transmit from within National Parks. POTA has been a popular method of community and student outreach, with events taking place in parks and sometimes during other public events. The organization has worked to spread to countries outside the United States including the Caribbean and India. Amateur radio operators who set up stations at a park are known as activators, and other amateur radio operators who co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Frequency
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz). It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred meters). Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band. The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio. Because radio waves in this band can be reflected back to Earth by the ionosphere layer in the atmosphere – a method known as "skip" or " skywave" propagation – these frequencies are suitable for long-distance communication across intercontinental distances and for mountainous terrains which prevent line-of-sight communications. The band is used by international shortwave broadcasting stations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shortwave
Shortwave radio is radio transmission using shortwave (SW) radio frequencies. There is no official definition of the band, but the range always includes all of the high frequency band (HF), which extends from 3 to 30 MHz (100 to 10 metres); above the medium frequency band (MF), to the bottom of the VHF band. Radio waves in the shortwave band can be reflected or refracted from a layer of electrically charged atoms in the atmosphere called the ionosphere. Therefore, short waves directed at an angle into the sky can be reflected back to Earth at great distances, beyond the horizon. This is called skywave or "skip" propagation. Thus shortwave radio can be used for communication over very long distances, in contrast to radio waves of higher frequency, which travel in straight lines (line-of-sight propagation) and are limited by the visual horizon, about 64 km (40 miles). Shortwave broadcasts of radio programs played an important role in the early days of radio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roter Knopf
The Rote Knopf () is the second highest mountain in the Schober Group within the High Tauern in the Austrian Alps. It is only two metres short of the Petzeck, the highest summit in the Schober. Nevertheless, this peak is far less well known that the Hochschober or the Glödis. This is probably because the mountain is not visible from the valleys of the Kalser Tal or the anterior Debanttal. The easiest ascent runs from the Elberfelder Hut following the waymarking southwards before turning west and running along the southeastern arête to the summit. This climb not only requires sure-footedness, but also exposed, albeit not difficult, climbing at grade I. From the summit, Austria's highest mountain, the Großglockner The Grossglockner (german: Großglockner ; or just ''Glockner'') is, at 3,798 metres above the Adriatic (12,461 ft), the highest mountain in Austria and the highest mountain in the Alps east of the Brenner Pass. It is part of the larger Gloc ..., may be seen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2-meter Band
The 2-meter amateur radio band is a portion of the VHF radio spectrum that comprises frequencies stretching from 144 MHz to 148 MHz in International Telecommunication Union region (ITU) Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) and from 144 MHz to 146 MHz in ITU Region 1 (Europe, Africa, and Russia). The license privileges of amateur radio operators include the use of frequencies within this band for telecommunication, usually conducted locally with a line-of-sight range of about . Operation Because it is local and reliable, and because the licensing requirements to transmit on the 2-meter band are easy to meet in many parts of the world, this band is one of the most popular non- HF ham bands. This popularity, the compact size of needed radios and antennas, and this band's ability to provide easy reliable local communications also means that it is also the most used band for local emergency communications efforts, such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mendoza, Argentina
Mendoza (, ), officially the City of Mendoza ( es, Ciudad de Mendoza) is the capital of the province of Mendoza in Argentina. It is located in the northern-central part of the province, in a region of foothills and high plains, on the eastern side of the Andes. As of the , Mendoza had a population of 115,041 with a metropolitan population of 1,055,679, making Greater Mendoza the fourth largest census metropolitan area in the country. Ruta Nacional 7, the major road running between Buenos Aires and Santiago, runs through Mendoza. The city is a frequent stopover for climbers on their way to Aconcagua (the highest mountain in the Western and Southern Hemispheres) and for adventure travelers interested in mountaineering, hiking, horse riding, rafting, and other sports. In the winter, skiers come to the city for easy access to the Andes. Two of the main industries of the Mendoza area are olive oil production and Argentine wine. The region around Greater Mendoza is the largest win ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aconcagua
Aconcagua () is a mountain in the Principal Cordillera of the Andes mountain range, in Mendoza Province, Argentina. It is the List of highest mountains on Earth, highest mountain in the Americas, the highest outside Asia, and the highest in the Southern Hemisphere with a summit elevation of . It lies northwest of the provincial capital, the Mendoza, Argentina, city of Mendoza, about from San Juan Province, Argentina, San Juan Province, and from Argentina's border with neighbouring Chile. The mountain is one of the Seven Summits of the seven continents. Aconcagua is bounded by the ''Valle de las Vacas'' to the north and east and the ''Valle de los Horcones Inferior'' to the west and south. The mountain and its surroundings are part of the Aconcagua Provincial Park. The mountain has a number of glaciers. The largest glacier is the Ventisquero Horcones Inferior at about long, which descends from the south face to about in elevation near the Confluencia camp. Two other large g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Radio Operator
An amateur radio operator is someone who uses equipment at an amateur radio station to engage in two-way personal communications with other amateur operators on radio frequencies assigned to the amateur radio service. Amateur radio operators have been granted an amateur radio license by a governmental regulatory authority after passing an examination on applicable regulations, electronics, radio theory, and radio operation. As a component of their license, amateur radio operators are assigned a call sign that they use to identify themselves during communication. About three million amateur radio operators are currently active worldwide. Amateur radio operators are also known as radio amateurs or hams. The term "ham" as a nickname for amateur radio operators originated in a pejorative usage (like "ham actor") by operators in commercial and professional radio communities, and dates to wired telegraphy. The word was subsequently adopted by amateur radio operators. Demographics {, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMSAT
AMSAT is a name for amateur radio satellite organizations worldwide, but in particular the Radio Amateur Satellite Corporation (AMSAT) with headquarters at Washington, D.C. AMSAT organizations design, build, arrange launches for, and then operate (command) satellites carrying amateur radio payloads, including the OSCAR series of satellites. Other informally affiliated national organizations exist, such as AMSAT Germany (AMSAT-DL) and AMSAT Japan (JAMSAT). History AMSAT was founded in 1969 in Washington, D.C. to continue the efforts begun by Project OSCAR. Its first project was to coordinate the launch of OSCAR 5, constructed by students at the University of Melbourne. Some design modifications were needed and were made by AMSAT members, and the satellite was successfully launched on 30 January 1970, on a NASA Thor Delta launch vehicle. AMSAT's next launch was AMSAT-OSCAR 6 (AO-6) on 15 October 1972. AO-6 was AMSAT's first long-life satellite, and was built with participan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
