scholarly journals IMPLEMENTATION OF THE GLOBAL AERONAUTICAL DISTRESS AND SAFETY SYSTEM (GADSS)

Aviation ◽  
2018 ◽  
Vol 22 (1) ◽  
pp. 24-30
Author(s):  
Dimov Stojce Ilcev
Keyword(s):  
Communication Systems ◽  
Satellite Communication ◽  
Safety System ◽  
International Standards ◽  
Global Navigation Satellite Systems ◽  
Civil Aviation ◽  
Satellite Systems ◽  
Land Vehicles ◽  
Global Navigation Satellite ◽  
Global Communications

In this paper is introduced the first proposal for development of Global Aeronautical Distress and Safety System (GADSS) in 1999 by the author of this article. The GADSS is de facto the integration of space (radio and satellite) Communication, Navigation and Surveillance (CNS) with Tracking, Detecting and Search and Rescue (SAR) systems, which have to provide airmen with global communications and locating networks. The GPS, GLONASS and other Global Navigation Satellite Systems (GNSS) provide precise positioning data for vessels, land vehicles and aircraft, but modern CNS demands need for enhanced services and augmentation of GNSS networks. Both networks have to be integrated under an GADSS umbrella with elements capable of being operated by any individual onboard aircraft to ensure prompt distress alert for SAR procedure. The enhanced concept of GADSS is that SAR authorities ashore and ships in the immediate vicinity of the aircraft in distress have to be rapidly alerted via radio and satellite communication systems and to assist in a coordinated SAR operations with the minimum of delay. In 2016, 16 years in delay, the International Civil Aviation Organization (ICAO) has begun its process to amend international standards and recommended practices to align with GADSS concept. This paper will also introduce the necessary networks and equipment, which has to ensure harmonized and enhanced maritime and aeronautical global SAR systems.

scholarly journals A Survey for Recent Techniques and Algorithms of Geolocation and Target Tracking in Wireless and Satellite Systems

2021 ◽  
Vol 11 (13) ◽  
pp. 6079
Author(s):  
Abulasad Elgamoudi ◽  
Hamza Benzerrouk ◽  
G. Arul Elango ◽  
René Landry
Keyword(s):  
Target Tracking ◽  
Satellite Communication ◽  
Interference Mitigation ◽  
Global Navigation Satellite Systems ◽  
Military Operations ◽  
Satellite Systems ◽  
Disturbance Source ◽  
Single Radio ◽  
Novel Algorithms ◽  
Global Navigation Satellite

A single Radio-Frequency Interference (RFI) is a disturbance source of modern wireless systems depending on Global Navigation Satellite Systems (GNSS) and Satellite Communication (SatCom). In particular, significant applications such as aeronautics and satellite communication can be severely affected by intentional and unintentional interference, which are unmitigated. The matter requires finding a radical and effective solution to overcome this problem. The methods used for overcoming the RFI include interference detection, interference classification, interference geolocation, tracking and interference mitigation. RFI source geolocation and tracking methodology gained universal attention from numerous researchers, specialists, and scientists. In the last decade, various conventional techniques and algorithms have been adopted in geolocation and target tracking in civil and military operations. Previous conventional techniques did not address the challenges and demand for novel algorithms. Hence there is a necessity for focussing on the issues associated with this. This survey introduces a review of various conventional geolocation techniques, current orientations, and state-of-the-art techniques and highlights some approaches and algorithms employed in wireless and satellite systems for geolocation and target tracking that may be extremely beneficial. In addition, a comparison between different conventional geolocation techniques has been revealed, and the comparisons between various approaches and algorithms of geolocation and target tracking have been addressed, including H∞ and Kalman Filtering versions that have been implemented and investigated by authors.

Rising use of GNSS will test domestic regulators

2019 ◽  
Keyword(s):  
Civil Liberties ◽  
International Standards ◽  
Global Navigation Satellite Systems ◽  
Personal Privacy ◽  
Content Type ◽  
Satellite Systems ◽  
Location Data ◽  
Safety Cases ◽  
Commercial Applications ◽  
Global Navigation Satellite

Subject Domestic governance of GNSS. Significance The growing use of location data generated by global navigation satellite systems (GNSS) has implications for personal privacy, civil liberties and public safety. Cases involving its use and abuse have already gained national prominence in several jurisdictions, but most issues remain unresolved. Impacts Providers of products and services that use GNSS will face new requirements to ensure safety and privacy. Demand for illegal jammers will rise as more items are fitted with location trackers as a security feature. International standards will emerge for commercial applications.

SBAS Algorithm Performance in the Implementation of the ASIAPACIFIC GNSS Test Bed

2007 ◽  
Vol 60 (3) ◽  
pp. 363-371 ◽  
Author(s):  
Noppadol Pringvanich ◽  
Chalermchon Satirapod
Keyword(s):  
The Philippines ◽  
Global Navigation Satellite Systems ◽  
Asia Pacific ◽  
Civil Aviation ◽  
Future Research ◽  
Test Bed ◽  
Algorithm Performance ◽  
Satellite Systems ◽  
Global Navigation Satellite ◽  
Accuracy Performance

This paper discusses the preliminary performance analysis result of the Asia-Pacific Global Navigation Satellite Systems (GNSS) Test Bed. Currently, seven Asia-Pacific economies are participating in the Test Bed project, namely Australia, Chinese Taipei, Indonesia, Malaysia, the Philippines, Thailand and Vietnam. The Test Bed was commissioned in May 2006. The discussion topics in this paper include Test Bed system architecture and preliminary analysis of the system performance. As presented in this paper, while current Satellite-Based Augmentation System (SBAS) algorithms can improve the accuracy performance of GPS positioning results, it cannot fulfill the integrity performance required by civil aviation community. This paper analyzes the limitation of the algorithm and proposes future research topics related to the limitation.

scholarly journals QUALITY OF SATELLITE COMMUNICATION IN SELECTED MOBILE ANDROID SMARTPHONES

2021 ◽  
Vol 11 (4) ◽  
pp. 32-37
Author(s):  
Przemysław Falkowski-Gilski
Keyword(s):  
Mobile Devices ◽  
Satellite Communication ◽  
Urban Environments ◽  
Global Navigation Satellite Systems ◽  
Mobile Terminals ◽  
Everyday Activity ◽  
Satellite Systems ◽  
Global Navigation Satellite ◽  
Application Developers

Today, thanks to mobile devices, satellite communication is available to anyone and everywhere. Gaining information on one’s position using GNSS (Global Navigation Satellite Systems), particularly in unknown urban environments, had become an everyday activity. With the widespread of mobile devices, particularly smartphones, each person can obtain information considering his or her location anytime and everywhere. This paper is focused on a study, considering the quality of satellite communication in case of selected mobile terminals. It describes a measurement campaign carried out in varying urban environments, including a set of Android-powered smartphones coming from different manufacturers. Based on this, respective conclusions and remarks are given, which can aid consumers as well as device manufacturers and application developers.

Solar radio burst interference index dedicated to GNSS single and double frequency users

2020 ◽  
Author(s):  
Jean-Marie Chevalier ◽  
Nicolas Bergeot ◽  
Pascale Defraigne ◽  
Christophe Marque ◽  
Elisa Pinat
Keyword(s):  
Real Time ◽  
Solar Radio ◽  
Global Navigation Satellite Systems ◽  
Civil Aviation ◽  
International Gnss Service ◽  
Satellite Systems ◽  
Double Frequency ◽  
Weather Events ◽  
Gnss Measurements ◽  
Global Navigation Satellite

<p>Intense solar radio bursts (SRBs) emitted at L-band frequencies are a source of radio frequency interference for Global Navigation Satellite Systems (GNSS) by inducing a noise increase in GNSS measurements, and hence degrading the carrier-to-noise density (C/N<sub>0</sub>). Such space weather events are critical for GNSS-based applications requiring real-time high-precision positioning.</p><p>Since 2015, the Royal Observatory of Belgium (ROB) monitors in near real-time the C/N<sub>0</sub> observations from the European Permanent Network (EPN). The monitoring allows to detect accurately the general fades of C/N<sub>0</sub> due to SRBs over Europe as from 1 dB-Hz. It provides in near real-time a quantification of the GNSS signal reception fade for the L1 C/A and L2 P(Y) signals and notifies civilian single and double frequency users with a 4-level index corresponding to the potential impact on their applications. This service is part of the real-time monitoring service of the PECASUS project of the International Civil Aviation Organization (ICAO) which started end of 2019.</p><p>Results of this 5-year monitoring will be discussed, including the 3 SRBs of 2015 and 2017, together with the new developments toward a global index using the International GNSS Service (IGS) network. In addition, we will show how the SRB monitoring is sometimes interfered by GPS flex power campaigns on the satellites from blocks IIR-M and IIF, and how it is mitigated . The routine and transient GPS flex power campaigns will be presented in terms of C/N<sub>0</sub> variations for the EPN and IGS networks.</p>

Modelling of the reference STARs procedures in the context of RPAS integration in non-segregated airspace

2020 ◽  
Vol 92 (9) ◽  
pp. 1385-1392
Author(s):  
Daniel Lichoń
Keyword(s):  
Traffic Management ◽  
Design Guidelines ◽  
Global Navigation Satellite Systems ◽  
Civil Aviation ◽  
Very High Frequency ◽  
Content Type ◽  
Mean Values ◽  
Satellite Systems ◽  
Reference Shape ◽  
Global Navigation Satellite

Purpose This work presents the part of the research in the integration of the remotely piloted aircraft systems (RPAS) in non-segregated airspace. The purpose of this study is to elaborate the reference shape of the Standard Instrument Arrivals (STARs) procedures of controlled airports. The STARs parameters are unique for the aerodromes and depend on navigational aids (NAVAIDs), manoeuvres and aircraft categories. Therefore, the elaboration of reference shapes was advisable in the context of RPAS integration research. Design/methodology/approach The models were based on the procedure design guidelines by International Civil Aviation Organization. The statistics of existing STARs were prepared using Aeronautical Information Publications to determine the representative procedural parameters. Construction of procedural shapes required to define the nominal flight path and tolerance areas. Findings In statistics, the standard deviation of distances was below the determined reference mean values, thus the models were convergent with existing procedures. Research limitations/implications The modelling was limited to initial, intermediate, final and missed approach segments. Arrival segment was not modelled. NAVAIDs include Instrument Landing System Category 1 (in final and missed approach) and very high-frequency omni-directional ranging or global navigation satellite systems (in initial and intermediate approach segments). Practical implications Prepared models may be used in research in the integration of the new types of aerial vehicles in existing air traffic management systems. Originality/value The reference STARs possess commonly used procedural manoeuvres (straight-in, turn, racetrack and base turn) and different NAVAIDs. The parameters of approach segments were determined as representative of the existing procedures. Moreover, the models are suitable to place at arbitrary origin and runway axis bearing.

A Study on Geometric and Barometric Altitude Data in Automatic Dependent Surveillance Broadcast (ADS-B) Messages

2019 ◽  
Vol 72 (5) ◽  
pp. 1140-1158
Author(s):  
Busyairah Syd Ali ◽  
Nur Asheila Taib
Keyword(s):  
Traffic Control ◽  
Traffic Management ◽  
Air Traffic Management ◽  
Air Traffic ◽  
Global Navigation Satellite Systems ◽  
Civil Aviation ◽  
Vertical Separation ◽  
Satellite Systems ◽  
Flight Level ◽  
Global Navigation Satellite

In Air Traffic Control (ATC), aircraft altitude data is used to keep an aircraft within a specified minimum distance vertically from other aircraft, terrain and obstacles to reduce the risk of collision. Two types of altitude data are downlinked by radar; actual flight level (Mode C) and selected altitude (Mode S). Flight level indicates pressure altitude, also known as barometric altitude used by controllers for aircraft vertical separation. ‘Selected altitude’ presents intent only, and hence cannot be used for separation purposes. The emergence of Global Navigation Satellite Systems (GNSSs) has enabled geometric altitude on board and to the controllers via the Automatic Dependent Surveillance-Broadcast (ADS-B) system. In addition, ADS-B provides quality indicator parameters for both geometric and barometric altitudes. Availability of this information will enhance Air Traffic Management (ATM) safety. For example, incidents due to Altimetry System Error (ASE) may potentially be avoided with this information. This work investigates the use and availability of these parameters and studies the characteristics of geometric and barometric data and other data that complement the use of these altitude data in the ADS-B messages. Findings show that only 8·7% of the altitude deviation is < 245 feet (which is a requirement of the International Civil Aviation Organization (ICAO) to operate in Reduced Vertical Separation Minimum (RVSM) airspace). This work provides an alert/guidance for future ground or airborne applications that may utilise geometric/barometric altitude data from ADS-B, to include safety barriers that can be found or analysed from the ADS-B messages itself to ensure ATM safety.

scholarly journals Applications of Space Technologies to Global Health: Scoping Review (Preprint)

2017 ◽  
Author(s):  
Damien Dietrich ◽  
Ralitza Dekova ◽  
Stephan Davy ◽  
Guillaume Fahrni ◽  
Antoine Geissbühler
Keyword(s):  
Global Health ◽  
Scoping Review ◽  
Satellite Communication ◽  
Global Navigation Satellite Systems ◽  
Navigation Satellite ◽  
Space Technology ◽  
Satellite Systems ◽  
Key Stakeholders ◽  
Global Navigation ◽  
Global Navigation Satellite

BACKGROUND Space technology has an impact on many domains of activity on earth, including in the field of global health. With the recent adoption of the United Nations’ Sustainable Development Goals that highlight the need for strengthening partnerships in different domains, it is useful to better characterize the relationship between space technology and global health. OBJECTIVE The aim of this study was to identify the applications of space technologies to global health, the key stakeholders in the field, as well as gaps and challenges. METHODS We used a scoping review methodology, including a literature review and the involvement of stakeholders, via a brief self-administered, open-response questionnaire. A distinct search on several search engines was conducted for each of the four key technological domains that were previously identified by the UN Office for Outer Space Affairs’ Expert Group on Space and Global Health (Domain A: remote sensing; Domain B: global navigation satellite systems; Domain C: satellite communication; and Domain D: human space flight). Themes in which space technologies are of benefit to global health were extracted. Key stakeholders, as well as gaps, challenges, and perspectives were identified. RESULTS A total of 222 sources were included for Domain A, 82 sources for Domain B, 144 sources for Domain C, and 31 sources for Domain D. A total of 3 questionnaires out of 16 sent were answered. Global navigation satellite systems and geographic information systems are used for the study and forecasting of communicable and noncommunicable diseases; satellite communication and global navigation satellite systems for disaster response; satellite communication for telemedicine and tele-education; and global navigation satellite systems for autonomy improvement, access to health care, as well as for safe and efficient transportation. Various health research and technologies developed for inhabited space flights have been adapted for terrestrial use. CONCLUSIONS Although numerous examples of space technology applications to global health exist, improved awareness, training, and collaboration of the research community is needed.

scholarly journals Autonomous algorithms for monitoring the integrity of the navigation field in relation to GNSS GLONASS

2021 ◽  
Vol 5 (1) ◽  
pp. 44-50
Author(s):  
N. V. Leonidov
Keyword(s):  
Satellite System ◽  
Global Navigation Satellite Systems ◽  
Civil Aviation ◽  
Navigation Satellite ◽  
International Civil Aviation Organization ◽  
Satellite Systems ◽  
Operational Characteristics ◽  
The Common ◽  
Global Navigation ◽  
Global Navigation Satellite

The purpose of this article is to analyze the existing algorithms of autonomous control of the integrity of the navigation field of the GLONASS system. The analysis is based on domestic materials and official foreign applications. At the beginning of the article, the concept of the integrity of the global navigation satellite system is given in the form in which it is used in International Civil Aviation Organization and among the developers of such systems. The differences between the common types of control of the integrity of the navigation field are shown. The modeling of individual operational characteristics, including the average geometric factor, visibility, and accessibility for different angles of the site, is carried out. The main solutions to the problem of reduced tactical and technical characteristics of the system are compared. The existing prerequisites for the improvement of the GLONASS system and for the use of small navigation spacecraft to eliminate the gap between GLONASS and competing global navigation satellite systems are listed. As a result, a variant of improving the circumstances for the application of these algorithms in unfavorable conditions in relation to the GLONASS system is proposed. It is shown that the low-orbit addition to the GLONASS system can significantly improve the tactical and technical characteristics of the complex as a whole and provide higher reliability of the system as a whole due to the operational maintenance of the integrity of the navigation field.

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