Home > Terms > English (EN) > Loran

Loran

A hyperbolic navigation system for measuring differences between distances from a radio receiver to three or more fixed transmitters of known geographic location. One type of Loran operates in a narrow band about 2 MHz; another in a narrow band about 100 kHz. The receiver's location is found to lie on a particular hyperbola like curve on the ellipsoid by measuring the difference in times of arrival of pulses sent synchronously from a single pair of transmitters. This curve is one of the two loci of all points whose distances from the two stations differ by the linear equivalent of the time interval measured. By measuring the time interval using a different pair of stations, a second hyperbola-like curve is determined. The receiver is therefore located at the intersection of these two curves. Note that each difference actually determines a pair of hyperbolas (i.e., a complete hyperbola of two branches.) However, one branch is usually too far distant from the approximately known location of the receiver to need consideration. Furthermore, it is usually on land.

0
Collect to Blossary

Member comments

You have to log in to post to discussions.

Terms in the News

Billy Morgan

Sports; Snowboarding

The British snowboarder Billy Morgan has landed the sport’s first ever 1800 quadruple cork. The rider, who represented Great Britain in the 2014 Winter Olympics in Sochi, was in Livigno, Italy, when he achieved the man-oeuvre. It involves flipping four times, while body also spins with five complete rotations on a sideways or downward-facing axis. The trick ...

Marzieh Afkham

Broadcasting & receiving; News

Marzieh Afkham, who is the country’s first foreign ministry spokeswoman, will head a mission in east Asia, the state news agency reported. It is not clear to which country she will be posted as her appointment has yet to be announced officially. Afkham will only be the second female ambassador Iran has had. Under the last shah’s rule, Mehrangiz Dolatshahi, a ...

Weekly Packet

Language; Online services; Slang; Internet

Weekly Packet or "Paquete Semanal" as it is known in Cuba is a term used by Cubans to describe the information that is gathered from the internet outside of Cuba and saved onto hard drives to be transported into Cuba itself. Weekly Packets are then sold to Cuban's without internet access, allowing them to obtain information just days - and sometimes hours - after it ...

Asian Infrastructure Investment Bank (AIIB)

Banking; Investment banking

The Asian Infrastructure Investment Bank (AIIB) is an international financial institution established to address the need in Asia for infrastructure development. According to the Asian Development Bank, Asia needs $800 billion each year for roads, ports, power plants or other infrastructure projects before 2020. Originally proposed by China in 2013, a signing ...

Spartan

Online services; Internet

Spartan is the codename given to the new Microsoft Windows 10 browser that will replace Microsoft Windows Internet Explorer. The new browser will be built from the ground up and disregard any code from the IE platform. It has a new rendering engine that is built to be compatible with how the web is written today. The name Spartan is named after the ...

Featured Terms

Silentchapel
  • 0

    Terms

  • 95

    Blossaries

  • 10

    Followers

Industry/Domain: Religion Category: Christianity

Marcellin Champagnat

Saint Marcellin Joseph Benedict Champagnat (20 May 1789 – 7 June 1840) was born in Rozet, village of Marlhes, near St. Etienne (Loire), France. He was ...