Abstract

Abstract. This paper provides an overview and the results of the Australia-Japan 2020 Quasi Zenith Satellite System (QZSS) Emergency Warning System trial project. The project aimed to evaluate and demonstrate the feasibility of utilising the QZSS system to support emergency warning and response in Australia. The trial has focussed on bushfire and tsunami warnings with an emphasis on the message structure and standards for incorporation on the available signal bandwidth, and the spatial coverage extent of the messages. It also aimed to address the need for a space-based communication capability in Australia, which could potentially facilitate effective emergency warning system unconstrained by the limitations of terrestrial telecommunications.A newly dedicated MobileApp was developed to decode the warning message and visualise relevant information on a map. Two messages for bushfire and tsunami warnings were generated in Australia and sent to the QZSS ground station for satellite transmission. The developed application was tested in Victoria and New South Wales. The trial was successful in the sense that the emergency warning message could be received and decoded using the QZSS enabled receivers and the dedicated MobileApp. The field tests showed that the systems are capable of delivering the required information to users with the required timeliness and completeness. Several technical issues encountered during testing can be primarily attributed to the alpha state of the app, and the specific receiver used for testing. Neither of which are considered to be significant barriers to the on-going development of an operational satellite EWS system.

Highlights

  • Australia is not immune to emergencies and disasters that are known to cause devastating human, economic and environmental losses

  • Three GNSS receivers were provided by the Japanese company Softbank to support the Australia-Japan Quasi Zenith Satellite System (QZSS) Emergency Warning Services (EWS) trial project

  • A bench test was completed to ensure a stable workflow from the design and transmission of Australian EWS messages via QZSS, to receiving, decoding and logging of the EWS message data

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Summary

INTRODUCTION

Australia is not immune to emergencies and disasters that are known to cause devastating human, economic and environmental losses. Global and Regional Navigation Satellite Systems (GNSS/RNSS) and Satellite Based Augmentation Systems (SBAS), in addition to supporting Position, Navigation and Timing (PNT) applications, have the potential to delivery of short warning messages as part of the GNSS Emergency Warning Services (EWS). At the beginning of February 2020, over 11 million hectares of bush, parks and forest have been burnt with the unfortunate loss of 33 lives, and significant impact to native fauna This has prompted a renewed interest in a satellite-delivered EWS capabilities provided by QZSS. FrontierSI together with Geoscience Australia (GA), Australian Trade and Investment Commission (Austrade), the Japanese National Space Policy Secretariat (NSPS), RMIT and UNSW Universities, NSW State Emergency Services (SES), NSW Rural Fire Service (RFS) and Emergency Management Australia (EMA) have collaborated in Australia-Japan 2020 QZSS EWS trial project. This paper provides an overview of the trial project, as well as a summary of the results obtained, conclusions drawn, and recommendations made

GNSS EWS TECHNOLOGY
QZSS EWS Enabled Equipment
QZSS Signal Testing Methodology
Bench Test Results
EWS MobileApp
EWS test with emergency personnel in Sydney
CHALLENGES
CONCLUSIONS
OPPORTUNITIES AND RECOMMENDATIONS
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