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Projecte llegit

Títol: Analysis and optimization of radio spectrum pollution on 1030/1090MHz bands associated with mode-S transponders

Estudiants que han llegit aquest projecte:

Director/a: ÚBEDA FARRE, EDUARD

Departament: TSC

Títol: Analysis and optimization of radio spectrum pollution on 1030/1090MHz bands associated with mode-S transponders

Data inici oferta: 15-07-2020     Data finalització oferta: 15-03-2021


Estudis d'assignació del projecte:
    GR ENG SIST AEROESP
Tipus: Individual
 
Lloc de realització: EETAC
 
Paraules clau:
Secondary surveillance radar; Mode-S transponder; all-call requests
 
Descripció del contingut i pla d'activitats:
The main purpose of this work is to carry out a rigorous analysis of the mode-S Secondary-Surveillance Radar (SSR) technology concerning the involved electromagnetic pollution, as compared with the requirements in the EU surveillance regulations No. 1207/1211 for the single European sky. This work aims to identify the main drawbacks of the regular performance of the present SSR systems that give rise to the observed overload of surveillance messages in busy airspaces. The understanding and identification of the main sources of increased pollution in the present mode-S SSR systems will arise from processing the raw data gathered by ground and airborne antennas through software tools, such as Pandas, Azure or Access. If possible, strategies to mitigate the observed overload of surveillance messages will be presented. Special emphasis will be provided to revisit the efficiency of determined all-call protocols, such as the stochastic acquisition and the lockout override.
 
Overview (resum en anglès):
Aviation is a transportation means that is continuously growing as years pass by and it¿s here to stay. While aviation is a wide and complex subject involving an enormous variety of fields, this thesis will be focused on a quite specific matter.

There¿s a field inside the air navigation services called CNS, meaning Communication, Navigation and Surveillance, which studies the telecommunications systems on board the aircrafts. Regarding the Surveillance part of the CNS services, there is a whole field of study focused on aircraft detection and tracking, which I will discuss in this thesis. After getting along with the current surveillance technologies, we will be able to analyse what are the vulnerabilities of the system, paying special attention to the radio electric pollution on the air.

As stated, aviation grows yearly as it had already become affordable for everyone, connecting millions of people around the world. With respect to telecommunication systems, and narrowing it to the topic, the surveillance system, the rise on number of aircraft has in turn raised the messages sent to the air. The trouble on having more messages sent to the air is that on dense airspaces the receivers may not understand everything they are listening to, as if we walked into a crowded bar trying to understand every conversation. The European Commission came up with a solution on 2011 with the Commission Regulation No 1207/2011, or more known as SPI-IR (Surveillance Performance and Interoperability ¿ Implementing Rule). The article 6 of this document offers the key points to diminish the growing problem of air radio electric pollution and we will use this article as a reference to see the performance of the current actual system.

For good or for bad, COVID-19 has put a pause on the aviation industry and as a result, air pollution has decreased. Not only on the ecological meaning of pollution, but also on the RF pollution. Nevertheless, as we are eventually getting out of this pandemic, we will have to prepare ourselves and be ready for the non-stop growing aviation industry we used to have.

With this thesis, we will firstly comprehend how we arrived to the current surveillance system. Then we will surf a bit on all the different technologies used to make the surveillance system work, and last but not least, we will check what is the performance of the air surveillance system within a not-so-much-now crowded airspace, giving a couple of ideas in order to optimise the air surveillance and providing some conclusions. Sit back, relax and enjoy the reading!

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