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KPH (radio)
KPH is a coast radio station on the Pacific Coast of the United States. For most of the 20th century, it provided ship to shore communications including telegrams (using Morse code) and marine telex service (using radioteletype). The station discontinued commercial operation in 1998, but is operated occasionally as a historic service – its signal can be received over a large portion of the western hemisphere. Ship to shore telephone calls were not handled by KPH but by other stations such as the nearby AT&T high seas station KMI. History The station dates back to the dawn of the radio era in the early years of the twentieth century when it began operations at the Palace Hotel in San Francisco, California, using the callsign "PH". Forced out by the 1906 San Francisco earthquake and fire, the station moved from one temporary site to another until it was acquired by the Radio Corporation of America (RCA) and relocated to Marin County. Subsequently, it was owned by MCI Commun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coast Radio Station
A coast (or coastal) radio station (short: coast station) is an onshore maritime radio station which monitors radio distress frequencies and relays ship-to-ship and ship-to-land communications. A coast station (also: '' coast radio station '') is – according to ''article 1.75'' of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR)ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.75, definition: '' coast earth station / coast earth radio station'' – defined as «''A land station in the maritime mobile service''.» Coast Radio Station had an important role in the history of wireless radio communication as well as in maritime and war history. Recent costal radio station provide medical advice services for ships, transmitting meteo messages and navigational warnings (NAV-Notice) on a regular base and all of them do a distress chanel watch (DSC-Watch) on VHF Chanel 16. Not all station monitore 2182 kHz shortwave anymore. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolinas, California
Bolinas is an unincorporated coastal community and census-designated place in Marin County, California, United States. As of the 2020 census it had a population of 1,483. It is located on the California coast, approximately (straight line distance) northwest of San Francisco, and by road. History Prior to the European colonization of California, the Coast Miwok lived in the area, possibly calling the area "Bali-N". Bolinas and present-day Stinson Beach were once encompassed by Rancho Las Baulines, a Mexican land grant given by Governor Pío Pico to Gregorio Briones in 1846. The first post office in the town of Bolinas opened in 1863. The post office closed on March 3, 2023, leaving the town more isolated. The town's residents have petitioned for it to reopen. In 1927, a former dairy farm on the Big Mesa was subdivided into a grid of streets and 5,336 lots measuring . Many of these lots were sold for $69.50 by the San Francisco Bulletin as a subscription promotio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Associated Press
The Associated Press (AP) is an American not-for-profit organization, not-for-profit news agency headquartered in New York City. Founded in 1846, it operates as a cooperative, unincorporated association, and produces news reports that are distributed to its members, major U.S. daily newspapers and radio and television broadcasters. Since the award was established in 1917, the AP has earned 59 Pulitzer Prizes, including 36 for photography. The AP is also known for its widely used ''AP Stylebook'', its AP polls tracking National Collegiate Athletic Association, NCAA sports, sponsoring the National Football League's annual awards, and its election polls and results during Elections in the United States, US elections. By 2016, news collected by the AP was published and republished by more than 1,300 newspapers and broadcasters. The AP operates 235 news bureaus in 94 countries, and publishes in English, Spanish, and Arabic. It also operates the AP Radio Network, which provides twice ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amateur Radio
Amateur radio, also known as ham radio, is the use of the radio frequency radio spectrum, spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency, emergency communications. The term ''"radio amateur"'' is used to specify ''"a duly authorized person interested in radioelectric practice with a purely personal aim and without wikt:pecuniary, pecuniary interest"'' (either direct monetary or other similar reward); and to differentiate it from commercial broadcasting, public safety (police and fire), or two-way radio professional services (maritime, aviation, taxis, etc.). The amateur radio service (''amateur service'' and ''amateur-satellite service'') is established by the International Telecommunication Union (ITU) through their recommended radio regulations. National governments regulate technical and operational characteristics of transmissions and issue individual station li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Time Zone
The Pacific Time Zone (PT) is a time zone encompassing parts of western Canada, the western United States, and western Mexico. Places in this zone observe standard time by subtracting eight hours from Coordinated Universal Time ( UTC−08:00). During daylight saving time, a time offset of UTC−07:00 is used. In the United States and Canada, this time zone is generically called the Pacific Time Zone. Specifically, time in this zone is referred to as Pacific Standard Time (PST) when standard time is being observed (early November to mid-March), and Pacific Daylight Time (PDT) when daylight saving time (mid-March to early November) is being observed. In Mexico, the corresponding time zone is known as the ''Zona Noroeste'' (Northwest Zone) and observes the same daylight saving schedule as the United States and Canada. The largest city in the Pacific Time Zone is Los Angeles, whose metropolitan area is also the largest in the time zone. The zone is two hours ahead of the Ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universal Time
Universal Time (UT or UT1) is a time standard based on Earth's rotation. While originally it was mean solar time at 0° longitude, precise measurements of the Sun are difficult. Therefore, UT1 is computed from a measure of the Earth's angle with respect to the International Celestial Reference Frame (ICRF), called the Earth Rotation Angle (ERA, which serves as the replacement for Greenwich Mean Sidereal Time). UT1 is the same everywhere on Earth. UT1 is required to follow the relationship :ERA = 2π(0.7790572732640 + 1.00273781191135448'' · Tu'') radians where ''Tu'' = ( Julian UT1 date − 2451545.0). History Prior to the introduction of standard time, each municipality throughout the clock-using world set its official clock, if it had one, according to the local position of the Sun (see solar time). This served adequately until the introduction of rail travel in Britain, which made it possible to travel fast enough over sufficiently long distances as to req ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half Moon Bay, California
Half Moon Bay is a coastal city in San Mateo County, California, United States, approximately south of San Francisco. Its population was 11,795 2020 census. Immediately north of Half Moon Bay is Pillar Point Harbor and the unincorporated community of Princeton-by-the-Sea. Half Moon Bay is known for Mavericks, a big-wave surf location. It is called Half Moon Bay because of its crescent shape. Originally an agricultural outpost to Mission San Francisco de Asís, the town was founded in the 1840s first as San Benito, and then as its Anglo fishing community grew, it was renamed Spanishtown. In 1874, it was again renamed Half Moon Bay. After rail and road connections in the early 1900s, the town grew. The foggy weather of the coast made the town a popular destination for booze-running during Prohibition. The city's infrastructure is heavily integrated with the coast, including the Pillar Point Harbor, major roads, and the fire department. The economy of Half Moon Bay is domin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seattle Post-Intelligencer
The ''Seattle Post-Intelligencer'' (popularly known as the ''Seattle P-I'', the ''Post-Intelligencer'', or simply the ''P-I'') is an online newspaper and former print newspaper based in Seattle, Washington (state), Washington, United States. The newspaper was founded in 1863 as the weekly ''Seattle Gazette'', and was later published daily in broadsheet format. It was long one of the city's two daily newspapers, along with ''The Seattle Times'', until it became an online-only publication on March 18, 2009. History J.R. Watson founded the ''Seattle Gazette'', Seattle's first newspaper, on December 10, 1863. The paper failed after a few years and was renamed the ''Weekly Intelligencer'' in 1867 by new owner Sam Maxwell. In 1878, after publishing the ''Intelligencer'' as a morning daily, printer Thaddeus Hanford bought the ''Daily Intelligencer'' for $8,000. Hanford also acquired Beriah Brown's daily ''Puget Sound Dispatch'' and the weekly ''Pacific Tribune'' and folded both pap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PACTOR
PACTOR is a radio modulation mode used by amateur radio operators, marine radio stations, military or government users such as the United States Department of Homeland Security, and radio stations in isolated areas to send and receive digital information via radio. PACTOR is an evolution of both AMTOR and packet radio; its name is a portmanteau of these two technologies' names. PACTOR uses a combination of simple FSK modulation, and the ARQ protocol for robust error detection and data throughput. Generational improvements to PACTOR include PACTOR II, PACTOR III, and PACTOR IV which are capable of higher speed transmission. PACTOR is most commonly used on frequencies between 1 MHz and 30 MHz. History PACTOR ''(Latin: The mediator)'' was developed by Special Communications Systems GmbH (SCS) and released to the public in 1991. PACTOR was developed in order to improve the reception of digital data when the received signal was weak or noisy. It combin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CLOVER2000
CLOVER is the name of a series or class of modem modulation techniques (“waveforms”) specifically designed for use over high frequency (HF) radio systems. * CLOVER-II was the first CLOVER waveform sold commercially, developed by Ray Petit, W7GHM, and HAL Communications in 1990–92. * CLOVER-2000 is a higher-rate and wider bandwidth version of CLOVER developed in 1995. * CLOVER-400 is a special 400 Hz wide waveform that was developed for Globe Wireless. Modulation schemes In ARQ mode, all CCB's (CLOVER Control Blocks) use BPSK modulation and data blocks may be sent using BPSK, QPSK, 8PSK (see phase-shift keying), 8P2A, or 16P4A (see QAM) modulation. Data is sent in 255-byte blocks. The FEC broadcast mode of CLOVER-2000 is usually disabled although special formats are available for specific applications. The coding polynomial protocol could be shared after payment in Bit Coin Radio Interface requirements for CLOVER-2000 The CLOVER waveform offers high performance, error ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teleprinter
A teleprinter (teletypewriter, teletype or TTY) is an electromechanical device that can be used to send and receive typed messages through various communications channels, in both point-to-point (telecommunications), point-to-point and point-to-multipoint communication, point-to-multipoint configurations. Initially, from 1887 at the earliest, teleprinters were used in telegraphy. Electrical telegraphy had been developed decades earlier in the late 1830s and 1840s, then using simpler Morse key equipment and telegraph operators. The introduction of teleprinters automated much of this work and eventually largely replaced skilled labour, skilled operators versed in Morse code with Data entry clerk, typists and machines communicating faster via Baudot code. With the development of early computers in the 1950s, teleprinters were adapted to allow typed data to be sent to a computer, and responses printed. Some teleprinter models could also be used to create punched tape for Compute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
