Computer Science – Performance
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.593p&link_type=abstract
IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,
Computer Science
Performance
Scientific paper
Satellite Based Augmentation systems (SBAS) provide to Global Navigation Satellite Systems (GNSS) users with an extra set of information, in order to enhance accuracy and integrity levels of GNSS stand alone positioning. The ionosphere is one of the main error component in SBAS. Therefore, the analysis of system performances requires a calibration of the broadcast corrections. In this context, different test methods to analyze the performance of these corrections are presented. The first set of tests involves two of the ionospheric calculations that are applied to the Global Ionospheric Maps (GIM), computed by the IGS Associate Analysis Centers: a TEC TOPEX comparison test and the STEC variations test. The second family of tests provides two very accurate analysis based on large-baselines ambiguity resolution techniques giving accuracies of about 16cm of L1 and few millimeters of L1 in the STEC and double differenced STEC determinations, respectively. Those four analysis have been applied for the EGNOS System Test Bed (ESTB) signal, which is the European SBAS provider.
Hernandez-Pajares Manuel
Juan M.
Orus Roman
Prats X.
Sanz Javier
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