SCHOOL ON SYSTEMS AND NETWORKS

2018

MARCOS DIAZ: State of the art and Perspectives in communications with nano-satellites of Cubesat type: The learned lessons from SUCHAI program

Nano-satellites are tiny spacecrafts with masses between 1 kg to 10 kg, where the Cubesat standard should be highlighted as the most relevant type of this miniaturized vehicles. The Cubesat was introduced to the field as an educational tool. The main features of the standard are the low cost (comparatively speaking) and the fast development cycle. Approaching the 20 years from its conception the platform has started to gain momentum also due to a revitalization in the space sector, which is making more and more accessible for these type vehicles to go to space. Sophisticated scientific missions are being proposed and developed in many space agencies around the world. The private sector is also taking advantage of the standard to proposed new applications from space. For instance, the private company Planet Labs maintains a constellation of over 150 Cubesats of 3 liters each for earth observation in the visible band. Space X is proposing a massive constellation (thousand of satellites) for internet from space, although based on micro-satellites (10 kg up to 100 kg) or mini-satellites (100 kg up to 400 kg) instead of nano-satellites. In this presentation, it is discussed what the actual possibilities of having a constellation of communication system based on Nano-satellites and what might be the features of it with the current state of the art in communication systems. It is also discussed the challenges of opeartion and control of such a network. Based on that it is possible speculate on the practical applications that might be achieved, highlighting also the issues needed to be overcome to improve significantly the network performance.

Marcos Diaz is currently an Assistant Professor in the Electrical Engineering Department at University of Chile, Santiago, Chile. He received his Electrical Engineering degree in 2001 from University of Chile, his M.S. and Ph.D. degrees in Electrical Engineering in 2004 and 2009, respectively from Boston University. His research interests are related to the study of ionospheric turbulent plasma, incoherent scatter radar techniques, low-frequency-radio-astronomy/space instrumentation and nano-satellite technologies. Previously he has been research assistant at Smithsonian Astrophysical Observatory, MIT Haystack Observatory and Electrical and Computer Engineering Department at Boston University.

DENISE RIQUELME: SOFIA

Denise Riquelme trabaja en el Max-Planck de Radioastronomía en Bonn. Su linea de investigación es el estudio del medio interestelar. En particular estudia las nubes moleculares que se encuentran en el centro de nuestra Galaxia. El doctorado lo hice el España, en el IRAM de Granada. Ahi trabajó de astronoma de soporte del telescopio de 30 m que es una antena que trabaja en el milimétrico y submilimétrico.

Durante el postdoc, ha trabajado en el grupo de astronomía milimétrica y submilimétrica. Su instituto tiene el 50% de participación en el telescopio APEX que está en Chile para donde (el grupo de ingeniería) fabrican instrumentación y los astrónomos los usamos. El jefe de esta área es Rolf Gusten y el tiene 3 astronomos que van con él a hacer comissioning de los telescopios (ella es una de ellos)

Su grupo tiene un 20% de participación en SOFIA (el avión de la NASA que tiene un telescopio dentro). Vuelan en promedio 10 horas observando desde Estados Unidos y Nueva Zelanda). Rolf es el PI del instrumento alemán que se llama GREAT (es un receptor que opera entre~500 GHz hasta 4THz). Por lo que ella tambien va a SOFIA a encargarse de la calibración de los datos.

JONATHAN BREWER: The Future is Up in the Sky

A new space race is on, with private companies like SpaceX pushing launch frequency up and prices down. As a result, network operators are planning bigger and more innovative networks than ever. The amount of satellites is slated to quintuple in the next five years, and broadband capacity is set to jump by several orders of magnitude. The coming years will bring new orbits, new topologies, and new spectrum - all of which will be explored in detail in this talk. The future really is up in the sky.

Jonathan is a former network operator who now designs and builds innovative networks for broadband, public safety, utilities, and the Internet of Things. He's an approved radio certifier in New Zealand and provides microwave license coordination for many of the countries network operators. With the University of Oregon's Network Startup Resource Center he spends some of his time teaching network and wireless engineering in developing economies.

CARLOS GONZÁLEZ: Sistemas de comunicaciones de CubeSats y desafíos para IoT

Los nanosatélites de tipo CubeSat han abierto una nueva era de acceso al espacio para diferentes instituciones científicas, gobiernos y empresas en todo el mundo. El advenimiento de nuevas tecnologías y dispositivos tipo IoT abre un nicho que impone posibilidades de desarrollo y desafíos a este tipo de plataformas satelitales. Parte del programa espacial basado en nanosatélites de la Universidad de Chile consiste en investigar y desarrollar sistemas de comunicaciones adecuados a las restricciones del estándar CubeSat que puedan mejorar las capacidades de estos aparatos para dar soporte a los dispositivos IoT. En la presentación se detallarán los sistemas de comunicación, sus esquemas y capacidades, de los satélites desarrollados en el laboratorio SPEL de la Universidad de Chile así como una revisión a las tecnologías que están emergiendo a nivel global.

Chilean citizen, Electrical Engineer from the University of Chile, specialist in embedded systems and satellite communications. Worked on the SUCHAI project, developing the first chilean made nanosatellite that was launched into space in june 2017; he was involved in design and implementation of satellite flight software. Working as a researcher in the Advanced Mining Technology Center (AMTC), he has been involved in several projects, with scientific and industrial partners, mainly focused in the integration of geostatistical tools to ore resources evaluation software including: 3D visualization, HPC and distributed computing capabilities. He is a lecturer of the department of Informatic Engineering of the University of Santiago de Chile. Cofounder and CSO of Aurora Space, a spin-off company aimed to sustain and impulse the development of space sciences in Chile. Currently he pursues doctoral studies at the University of Chile researching about intersatellite communications in CubeSat constellations. More details: https://www.linkedin.com/in/carlosgonzalezcortes/?locale=en_US

Mª GRAZIA PRATO y JAZMINE MALDONADO: Sistema Integrado de Alarmas del Observatorio ALMA

ALMA, uno de los proyectos astronómicos más grandes del mundo, está compuesto de múltiples sistemas que deben funcionar adecuadamente y asegurar la máxima eficiencia, pues repercute en las observaciones realizadas. Para hacer el seguimiento del estado del observatorio un equipo de operadores monitorea los sistemas observando un conjunto de paneles no homogéneos lo que dificulta la interpretación del estado del sistema y la respuesta en caso de problemas.

Actualmente el European Southern Observatory (ESO) e Inria Chile están desarrollando un sistema distribuido para integrar el conjunto de alarmas generadas en el observatorio. El objetivo de este sistema es agilizar los procesos de reporte y respuesta, abordando desafíos como: - Integración de múltiples sistemas, algunos con dependencia jerárquica, desarrollados por colaboradores de ALMA y otros de carácter propietario. - Eficiencia y Resiliencia del sistema de envío y procesamiento de la información. - Rapidez de la reacción de los usuarios ante la contingencia y facilidad de creación de modelos mentales.

Grazia Prato: INRIA Chile, User Experience Design and User Interface Design for various technological projects. Data Visualisation, User Research, Human-Computer Interaction, Information Architecture, Front-end.

Jazmine Maldonado: INRIA Chile, Ingeniera de Investigación y Desarrollo de Software para proyectos de transferencia tecnológica a la industria Chilena. Estudios para empresas que involucran la aplicación de técnicas de minería de datos y aprendizaje de máquinas.

ROMINA TORRES: The role of models@runtime and Quantitative verification for Quality assurance of Critical Aerospace Software under uncertain operational environments

Nowadays, the aerospace mission is becoming more and more intensive, where the probability of runtime failures is higher due to the inherent uncertainty of the operational environment. Thus, runtime verification is needed to determine whether executions of monitored systems still satisfy their requirements. In 2002 the 1st ACM Workshop on Self-healing Systems was performed, in which self-* systems were introduced in order to provide guarantees about the required runtime quality properties of software systems. From those days, model driven engineering and quantitative verification (a mathematically-based technique for establishing the correctness, performance and reliability of systems that exhibit stochastic behavior) have been introduced as the basement for self-adaptive systems. In this talk we will argue that formal methods used in self-adaptive systems are essential to make resilient, the critical Aerospace Software under uncertain operational environments. We will illustrate how these methods may address different challenges from the critical aerospace software industry in the context of verification during runtime.

Romina Torres is professor at Andres Bello University, in the Faculty of Engineering. Her domains of expertise are related to validation and verification of software at runtime, intelligent systems and autonomic computing. She received her engineering degree, her PhD and a MSc in Computer Science from the Federico Santa María Technical University, Chile. The current key- topics that she explores are (1) new aggregation methods in fuzzy logic for decision making under uncertain environments, (2) new methods for minimizing the number of premature adaptations in self-adaptive and reconfigurable systems, and (3) dependable systems for smart cities. She is author of several publications in international peer-reviewed conferences and journals in the line of requirements@runtime. She has over 15 years of professional experience in different roles in international development companies such as the Global Software Group of Motorola Valparaíso and Software AG, as well as experience in applied research in internships carried out in INRIA (France), Synopsys (USA) and KLA-Tencor (USA).

JUAN FRAIRE: Motivation and Challenges in Space-Terrestrial Integrated Networks, a Delay-Tolerant Networking Approach

As space networks continue to grow in both size and amount, the need for their own integration as well as with ground networks becomes crucial. A Space-Terrestrial Integrated Network (STIN) can enable new services and mission features by means of extended coverage and unprecedented resources and data sharing. However, the intrinsic differences of space and ground domains impose significant challenges when developing efficient solutions that leverage existing technologies as they blend into a new networking paradigm. The first part of this talk presents two motivational STIN cases: 1) the upcoming segmented satellite architecture proposed by the Argentinian Space Agency (CONAE) and 2) the GOM-X4 mission partially funded by the European Space Agency (ESA) with two satellites currently operating in orbit. Based on this experience, the second part of the talk discusses how Delay-Tolerant Networking (DTN) protocol and architecture addresses automation and scalability, both mandatory to deploy large-scale STINs in the future. Furthermore, most relevant open research challenges are presented and discussed 1) protocol architecture, 2) distributed and centralized routing (a.k.a. software-defined satellite networking), 3) regionalized routing, 4) planning and scheduling and 5) cross-layer design.

Juan A. Fraire received the Telecommunications Engineering degree with important academic achievements and honors. Motorola's best-student scholarship and award unlocked his rapid involvement in mobile communication industries as a Motorola and Nokia Siemens Network engineer. With 5 years as a professional engineer, Juan built a strong background in developing, deploying and managing a wide range of 3G and 4G mobile networks. On-site support and training was also provided to customers around the world. Juan's expertise was further enhanced his PhD. in Engineering and Applied Sciences from the National University of Córdoba (UNC) in cooperation with the Argentinian Space Agency (CONAE). His focus of research was the implementation and optimization of communication algorithms and protocols for mobile networks in space. With only 5 years as a researcher, Juan authored a book based on his contributions, which have been recognized by colleagues from NASA, ESA, CNSA and more than 35 international journals and conferences. In 2014, he founded the International Space-Terrestrial Internetworking (STINT) workshop, which is held annually since then. After completing a postdoctoral stage at a CNRS laboratory in France, Juan was awarded a researcher position at Argentinian Scientific and Technical Research Council (CONICET). Presently, Juan is also an assistant professor in Computing Sciences in Astronomy, Mathematics and Physics Faculty (FAMAF) and consultant at CONAE.

PABLO HUIJSE: Análisis de datos astronómicos

This tutorial is on the discrimination of RR Lyrae light curves from the VVV survey data. The following topics are covered:

Periodicity detection in light curves using mutual information (P4J)

Feature extraction using Gaussian proccesses (scikit-learn)

Dimensionality reduction using PCA (scikit-learn) and autoencoders (tensorflow)

Interactive visualization of the reduced feature space using bokeh

Transductive classification using a positive-unlabeled (PU) random forest

ALBERT ASTUDILLO: REUNA, interconectando los datos del espacio.

Albert Astudillo es ingeniero de redes de la Red Académica chilena, REUNA. Ha contribuido por más de una década al desarrollo de la infraestructura de redes de REUNA, llevando a cabo las diferentes etapas de los proyectos, tanto a nivel de diseño como de implementación, lo que ha generado una amplia gama de conocimiento en diversas tecnologías y marcas en los ámbitos de routing, switching, y redes opticas DWDM.

Charla enfocada en entregar información sobre el nivel de conectividad existente en Chile para el ámbito de la educación e investigación, con foco en la conectividad de los centros astronómicos localizados en el país. Se hará una revisión de los diversos proyectos de infraestructura que REUNA ha ejecutado en los últimos 10 años, con enfásis en la reciente implementacion de una red de alta velocidad entre La Serena y Santiago (de 4x100Gbps), así como la proyección de crecimiento de esta infraestructura en el marco del Plan Estratégico de la Corporación.