Statistics – Applications
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.594r&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
This paper addresses strategic and technical decisions that have been taken recently on Global Navigation Satellite System (GNSS). Progress and policy challenges for a GNSS encountered by the International Civil Aviation Organization (ICAO) will be examined. An overview will be given of ICAO's long-term strategy for the implementation of GNSS at all levels, global and regional. Besides the technical, political and legal harmonization, it is essential that the necessary frequencies are made available and are adequately protected once GNSS is operational. The paper highlights the importance of frequency issues for the development of GNSS, both in terms of the requirement for additional frequency allocations as well as the need to ensure that the operation of GNSS is not interfered with by other radio communications services. At the last WRC 2000 in Istanbul, the band 5010 to 5030 MHz was allocated for GNSS services. The tentative Galileo frequency structure and signal plan using common center frequencies with GPS will enhance interoperability for future user of an integrated GNSS consisting of GPS and Galileo. Galileo will be fully compatible with GPS, but independent from it. In addition, a global satellite navigation system, even a civilian one as Galileo, has to consider global security aspects. The dual-nature of satellite navigation is used in critical infrastructure where an uninterrupted service of applications based on it, is absolutely vital. Disruption of GNSS services is a potential threat for economy, safety and security related applications. Without the possibility of transparency and interoperability, GNSS system will not meet the safety objectives defined by FANS Committee. Clear policy and legal principles on standardization need to be elaborated in the legal framework to govern GNSS implementation. Recommendations about what changes to the current operational structure would be most appropriate for the future in order to develop a true GNSS will be discussed. The Galileo program should give the United States, Russia, Europe and other countries the opportunity to define the GNSS system together for the next two decades, leading to better services for users and reduced pressure on public budgets. Cooperation will add to a growing number of industrial partnership in space-related fields in particular, as well as in user services and equipment.
Laffaiteur M.
Loescher A.
Nadeau Philippe
Remeikis K.
Sloan J. J.
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