OmniSTAR
Encyclopedia
OmniSTAR is a wide-area differential GPS
Differential GPS
Differential Global Positioning System is an enhancement to Global Positioning System that provides improved location accuracy, from the 15-meter nominal GPS accuracy to about 10 cm in case of the best implementations....

 service provider. OmniSTAR correction signals are proprietary, and a subscription must be bought from the OmniSTAR corporation to receive a subscription authorization.. OmniSTAR uses geostationary satellites in 8 regions covering most of the landmass of each inhabited continent on Earth:
  1. MSV-E, MSV-C, MSV-W (North America)
  2. AMSAT (Central and South America and the Caribbean
  3. AORWH (Atlantic Ocean East Coast)
  4. AOREH (Atlantic Ocean Europe/Africa
  5. EUSAT (Europe and Africa)
  6. IORHN (Indian Ocean Region)
  7. APSAT (Asia, Australasia, Western Pacific, Eastern Africa, Southern Africa)
  8. OCSAT (Australia, New Zealand)


MSV service is provided by the MSAT
MSAT
MSAT, short for Mobile Satellite, is a satellite-based mobile telephony service developed by the National Research Council of Canada. Supported by a number of companies in the US and Canada, MSAT hosts a number of services, including the broadcast of CDGPS signals...

 AMSC-1 and MSAT-M1 satellites, operated by a company called Mobile Satellite Ventures
Mobile Satellite Ventures
SkyTerra , formerly Mobile Satellite Ventures , is a Reston, Virginia company that develops telecommunications systems that integrate satellite and terrestrial radio communication technologies into one system...

.

To access the OmniSTAR solution the user must have an OmniSTAR capable receiver. OmniSTAR capable receivers are available from a number of GPS manufacturers such as Autofarm, Geneq, Hemisphere GPS
Hemisphere GPS
Hemisphere GPS designs and manufactures precision GPS products for positioning, guidance, and machine control applications. The company’s products are most notably used in agriculture, under the trade name Outback Guidance...

, NovAtel, Topcon, Trimble, Raven, etc.

The OmniSTAR service options include both single frequency (L1 only) code phase DGPS solutions and dual frequency (L1/L2) carrier phase solutions. Accuracy depends on satellite geometry, local conditions, receiver capability and other variables, but typically the L1 only solution (VBS - Virtual Base Station) yields horizontal accuracy of < +/1 meter >95% of the time and the L1/L2 solutions (OmniSTAR HP, OmniSTAR XP or HP/XP combined) provide horizontal accuracies of < +/- 15cms > 95%

XP makes use of precise orbit and clock corrections of the GPS Satellites. The data is bought from Nasa JPL
G2 uses Orbit and Clocks calculated from Omnistar's own network of reference stations.

OmniSTAR is a member of the Fugro Group of Companies

Motorola has a optical headend product line that once owned the Omnistar name. It continues to lead the industry with the next generation Omnistar GX2 platform


External links



The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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