Statistics – Applications
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.598w&link_type=abstract
IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,
Statistics
Applications
Scientific paper
Precise positioning with satellite based navigation systems necessitates the use of differential techniques. For differential positioning over very large areas, data on each of the individual error components (e.g. orbital errors, satellite clock errors) is required. Wide-area augmentation systems, such as WAAS and EGNOS, currently distribute such data through dedicated satellite transponders. It has been proposed recently to also distribute wide area differential GNSS (WADGNSS) data via the Internet. One of these initiatives is the ESA's SISNET (Signal in Space through the Internet) project which aims to provide EGNOS messages in real-time via the Internet. A system that also makes extensive use of the open Internet, both for communication with users and within the tracking network, is IGDG (Internet-based Global Differential GPS) from NASA's JPL. The availability of satellite based communication systems providing access to the Internet, combined with the availability of real-time WADGNSS data over the Internet, delivers a number of advantages for precise positioning to the end user. Terrestrial users benefit the most because of the increased WADGNSS signal availability, since traditional WADGNSS systems on their own often cannot meet strict availability requirements in a terrestrial environment because of signal masking. The above is only one of the different interesting synergetic applications of satellite based communication and navigation systems that are evaluated in this paper.
de Clercq A.
de Wulf A.
Willems T.
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