What is Carrier Phase ?

Ashtech offers the possibility to use carrier-phase techniques to achieve higher accuracy (centimetre level). This method counts the exact number of cycles of the carrying frequency between the GPS satellites and the receiver’s antenna.

The process requires an initial observation time to resolve the carrier-phase ambiguity. This period varies depending on the number of satellites available, the quality of the constellation, the baseline length (distance between base station and rover) and the technique used (On-the-fly Realtime Kinematics, Post-processed Static or Semi-kinematics, etc).

DISCOVER ASHTECH KEY MILESTONES!

(1970)
Sercel an electronics company in France starts the radiopositioning business using land based UHF transmiters at the time.

(1978)
NAVSTAR (Navigation System with Timing And Ranging), now known as GPS (Global Positioning System), launched by U.S. Department of Defense.

What is BLADE?
Ashtech invests heavily in the development of cutting-edge technology to further strengthen its position as a leading designer and developer of precision positioning technology. Recent developments have produced greater product integration and progressive augmentations to GPS/GNSS. These advances are apparent in the latest line of professional products including the new Ashtech BLADE™ Technology.

Explaining the ruggedness testing standards

GLONASS (Russian: ГЛОНАСС, abbreviation of ГЛОбальная НАвигационная СпутниковаяСистема; tr.: GLObal’naya NAvigatsionnaya Sputnikovaya Sistema; “GLObal NAvigation SatelliteSystem” in English) is a radio-based satellite navigation system, developed by the former Soviet Union and now operated for the Russian government by the Russian Space Forces.

It is an alternative and complementary to the United States‘ Global Positioning System (GPS), the Chinese COMPASS Navigation System, and the planned Galileo positioning system of the European Union (EU).

Development on the GLONASS began in 1976, with a goal of global coverage by 1991. Beginning on 12 October 1982, numerous rocket launches added satellites to the system until the constellation was completed in 1995. Following completion, the system rapidly fell into disrepair with the collapse of the Russian economy. Beginning in 2001, Russia committed to restoring the system, and in recent years has diversified, introducing the Indian government as a partner, and accelerated the program with a goal of restoring global coverage by 2009.^[1]

Geotagging is the process of adding geographical identification metadata to various media such as photographs, video, websites, or RSS feeds and is a form of geospatial metadata. These data usually consist of latitude and longitude coordinates, though they can also include altitude, bearing, accuracy data, and place names.