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Characteristics and Performance of Algerian Satellite Based Augmentation System (AL-SBAS)

Authors:
Lahouaria Tabti
Salem Kahlouche

Keywords: GPS; AL-SBAS; EGNOS; Indicators of Precision; Integrity.

Abstract:
The Algerian Satellite Based Augmentation System (AL-SBAS) is developed by the Algerian Space Agency (ASAL) and is based on Algerian geostationary satellite Alcomsat-1. AL-SBAS permits to transmit SBAS messages according to the international standards defined by the International Civil Aviation Organization (ICAO). Compared to existing SBAS, currently the service area of AL-SBAS is limited to Algeria only. Thus, the number of Ionospheric Grid Points (IGP) and satellites “to be increased “ is lower than the existing SBAS, in particular the European Geostationary Navigation Overlay Service (EGNOS). The Al-SBAS correction messages are calculated by the Data-Processing Center (DPC) using GPS satellite data collected from a terrestrial network of 18 Reference Stations (RS), which are geographically distributed over the entire country. This work presents the main characteristics and preliminary performance tests of the AL-SBAS System. The analysis concerns in particular the parameters of pseudo-range and ionospheric correction, as well as the integrity transmitted by the system. Very promising results have been achieved considering the number of currently available reference stations in the south of Algeria, which is a region EGNOS does not cover. The ionospheric indicators using EGNOS are between 8 and 15, while the AL-SBAS allows to have indicators ranging between 6 and 13.

Pages: 10 to 14

Copyright: Copyright (c) IARIA, 2023

Publication date: April 24, 2023

Published in: conference

ISSN: 2308-4480

ISBN: 978-1-68558-035-3

Location: Venice, Italy

Dates: from April 24, 2023 to April 28, 2023