Global locating system
Encyclopedia
A Global Locating System (GLS) is any system that operates via satellite around the world. Basically it helps to determine a location on Earth's surface in longitude and latitude.In addition, most syetem imple,entations support tracking, the depiction of a track of sequentially determined locations.
Commonly the terms "locating" (GLS = where is it?) and "positioning" (GPS = where does it go to?) are set equivalent. However the positioning task originates from the first military approaches on final locating, determining the cruise of a missile from launch to location of impact.
Hence GLS refers to the surveying tasks and GPS refers to the navigating tasks. Other interpretations might neglect the etymologic background of the terms.
An early example of GLS was the Sarsat Search and Rescue satellite system. In GLS, a minimal set of positioning data (e.g. signal arrival time or frequency offset or Doppler data) is collected and relayed via a satellite link. Equipment installed in the satellite Ground station demodulates the data and computes the latitude and longitude of the remote transmitter.
GLS is in use by Skybitz
, Cospas-Sarsat
. and the Argos System
.
Commonly the terms "locating" (GLS = where is it?) and "positioning" (GPS = where does it go to?) are set equivalent. However the positioning task originates from the first military approaches on final locating, determining the cruise of a missile from launch to location of impact.
Hence GLS refers to the surveying tasks and GPS refers to the navigating tasks. Other interpretations might neglect the etymologic background of the terms.
An early example of GLS was the Sarsat Search and Rescue satellite system. In GLS, a minimal set of positioning data (e.g. signal arrival time or frequency offset or Doppler data) is collected and relayed via a satellite link. Equipment installed in the satellite Ground station demodulates the data and computes the latitude and longitude of the remote transmitter.
GLS is in use by Skybitz
Skybitz
SkyBitz, based in Sterling, Virginia, is a United States company that offers a trailer tracking service.-Business:Based just outside of Washington, DC, SkyBitz provides products to track unpowered assets such as tractor-trailers, intermodal containers, rail cars, power generators, and heavy...
, Cospas-Sarsat
Cospas-Sarsat
Cospas-Sarsat is an international satellite-based search and rescue distress alert detection and information distribution system, established by Canada, France, the United States, and the former Soviet Union in 1979. It is best known as the system that detects and locates emergency beacons...
. and the Argos System
Argos System
Argos is a satellite-based system which collects, processes and disseminates environmental data from fixed and mobile platforms worldwide. What makes Argos unique is the ability to geographically locate the source of the data anywhere on the Earth utilizing the Doppler effect...
.