Recent Study on the Criticality of Space Based Oscillators for the Optimal Performance of Time-Based Signals | Chapter 16 | Advanced Aspects of Engineering Research Vol. 16

 The oscillators are at the heart of a satellite-based navigation system, as they are required for precise timing. The goal of this study is to find out how important space-based oscillators are for improving the performance of GNSS and satellite-based augmentation systems (SBAS). The NIGCOMSAT-1R navigation payload, which employs externalised 10 MHz Master Oscillators in a 3 X 4 hybrid array configuration, is Africa's contribution to the SBAS. It investigates the efficacy of Location Based Services using Navigation for Emergency and Crisis Management, among other applications.

Author (S) Details

Lawal S. Lasisi
Nigerian Communication Satellite Limited, Nigeria.

Chatwin R. Chris
University of Sussex, UK.

View Book :- https://stm.bookpi.org/AAER-V16/article/view/2001

An Overview of Global Navigation Satellite and Augmentation Systems | Chapter 5 | Recent Developments in Engineering Research Vol. 11

The value and application of the Global Navigation Satellite Systems (GNSS) has never been greater; demand for both commercial and government projects is increasing; the ownership and operation of a GNSS facility has indeed become a matter of national appreciation. GNSS technology has become popular with a large number of users through global signal availability and continuous service. This article reviews some of the history that led the United States to build its Global Positioning System (GPS) benchmark using electromagnetic waves and reviews the progress that other nations and regions have made in constructing precise positioning systems for navigation.

Author (s) Details

Engr. Dr. Lawal S. Lasisi
Satellite Applications and Development, Nigerian Communications Satellite Ltd, Obasanjo Space Center, Affiliated to Federal University of Technology, Minna, Nigeria.

Chatwin R. Chris
Engineering and Design, School of Engineering and Informatics, Room 2B07, Shawcross Building, University of Sussex, Falmer, BN1 9QT, Brighton, UK.

View Book :- https://stm.bookpi.org/RDER-V11/issue/view/26

A Study of a Low-Cost Navigation Augmentation System: The United Kingdom’s Immediate Answer to the Galileo Brexit Conundrum | Chapter 4 | Recent Developments in Engineering Research Vol. 11

The Brexit of the United Kingdom from the European Union means limited access to the Galileo system of the European Global Navigation Satellite System (GNSS); without access to the safe and encrypted signal used for security and government purposes, restricted to members of the European Union (EU). The United Kingdom may, as a matter of urgency, launch a payload on a national military communications satellite to provide navigation overlay services for the territory of the United Kingdom, surrounding waters and neighboring allies to meet the requirements of: defense systems, aviation, maritime requirements and the effectiveness of emergency location services. As a navigation overlay service (NOS) on a host national geostationary satellite using GNSS, in particular GPS and Galileo as an alternative to the Galileo PRS, the United Kingdom will deploy a low-cost Satellite-Based Augmentation System (SBAS) as a navigation overlay service (NOS) on a host national geostationary satellite using GNSS, in particular GPS and Galileo as an alternative to the Galileo PRS. This paper describes the design of a navigation overlay service system as a host payload on a national satellite and the required supporting ground.

Author (s) Details

Engr. Dr. Lawal S. Lasisi
Satellite Applications and Development, Nigerian Communications Satellite Ltd, Obasanjo Space Center, Affiliated to Federal University of Technology, Minna, Nigeria.

Chatwin R. Chris
Engineering and Design, School of Engineering and Informatics, Room 2B07, Shawcross Building, University of Sussex, Falmer, BN1 9QT, Brighton, UK.

View Book :- https://stm.bookpi.org/RDER-V11/issue/view/26