• Educational Activities for Students

    The educational program for children at Thissio Visitor Center

  • Doridis Telescope

    Doridis Telescope

  • WMO certificate
  • ttod_photo01
  • August

    August 2017 | Photo: Theofanis Matsopoulos


    Julius Schmidt, CHARTE DES GEBIRGE DES MONDES, 1878, ΝΟΑ Library

  • simonvouet English2

    Simon Vouet (1590 - 1649), The Muses Urania and Calliope (1634)

    National Gallery of Art, USA

  • Τηλεσκόπιο Αρίσταρχος English

    Aristarchos Telescope, Helmos Observatory

  • Helmos National Geographic English

    Helmos Observatory, Photography: Harry Katzjaeger
    Source: "Top Shots," National Geographic, June 2012

  • Eskimo Nebula NGC2392 English

    Eskimo Nebula (NGC2392), Aristarchos Telescope, Observer: Dr. Ioannis Alikakos (NOA)

    Digital Image Processing: Theofanis Matsopoulos.

  • Μουσείο Γεωαστροφυσικής English

    Geoastrophysics Museum, Thissio

  • Εκπαίδευση στο ΕΑΑ English

    Summer School in Astrophysics

  • Τηλεπισκόπηση-Γή English

    Remote Sensing & Earth Observation

  • Greece from ISS English

    Greece from the International Space Station

    Photography: Paolo Nespoli, ESA astronaut

  • 3D Sun English

    3D Image of the Sun from the Solar Dynamics Observatory (SDO) mission of NASA.

    Source: NASA's Solar Dynamics Observatory

  • Helicorder English

    Analogue seismograph recorder

  • Geothermal English
  • Παλιρροιογραφος English

    Tide-gauge of the Instittute of Geodynamics at Vlyhada, Santorini.

  • Πειραμα Ulusses English
    Recovered  Ocean Bottom Seismometers on board of research vessel in the frame of the ULYSSES scientific program
  • Meteo historic archive english

    The historic archive of NOA/IERSD with recordings of climatic observations dated from the mid-19th century is one of the oldesr sources of climatic information for Eastern Medirranean.

  • Meteo time-series graph English

    The evolution of the average annual temperature in Athens from the mid-19th century until today, according to the records of the historic station NOA/IERSD (Hill Nymphs Thission).

  • Researchers Night 2014

    Pnyx Hill: Citizens observe the night sky through telescopes of NOA

    Researchers Night 2014

  • Researchers Night 2014

    Pnyx Hill: Citizens observe the night sky through telescopes of NOA

    Researchers Night 2014




Short Wave critical Infrastructure Network based on new Generation of high survival radio communication system

Funding Organization:

European Commission

NOA Role:


Scientist in charge:

Dr. A. Belehaki

Start Date:


End Date:


Project Website:


Number of Personnel under NOA Contracts



SWING (Short Wave critical Infrastructure Network based on a new Generation high survival radio communication system) is a European project aimed at studying a high survival HF radio network to link European Critical Infrastructures (ECIs) among themselves.

This system is thought to replace broad band internet transmission, maintaining the minimum flux of essential information for the ECIs management and control, in case of wide scale terrorist attacks able to put out of order internet links over the Mediterranean region.

SWING is designed to evaluate the threat and increase the security awareness, as well as the level of protection, of analogous and/or interdependent ECIs.

In order to meet these goals SWING has to recognize how and when the internet communication fails and develop the standard software and hardware tools necessary for implementing communication protocols suited for a reliable and interoperable Short Wave (High Frequency) radio network back up.

To meet the above mentioned objectives the main activities concern the designation of ECIs in the regions of interest and the analysis of potential communication problems among them, followed by the identification of the most suitable topology for a high survival radio communication network.

Moreover, SWING has to determine the criteria for early warning alerts, the procedures to activate the backup network, as well as the minimal amount of information necessary to maintain control over ECIs keeping them linked even in critical conditions.

For what concerns the HF radio network, SWING defines and designs the software and hardware necessary to a high survival HF radio network, keeping into account the existing HF network communication protocol and architecture.

Since the network can use both the ionospheric channel and, if required, the ground wave propagation, SWING also studies the ionospheric channel characteristics in order to manage the transmission frequencies of the HF network


Penteli Visitor Center
Thissio Visitor Center
Educational program on Meteorology
Multiple Events

Real Time Seismicity

Institute of Geodynamics
seismografoi thumb

Weather Forecast


View the latest weather forecasts, maps, and alerts for Greece on meteo.gr


The Sky Today


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