Prof. Christos Pikridas Profile

Prof. Christos Pikridas

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Publications (5)

Proceedings Article | 13 September 2024 Open Access

Advancing forest biodiversity conservation with the EL-BIOS digital twin: an integration of LiDAR and multispectral earth observation data

I. Karolos, K. Bellos, V. Alexandridisale, I. Chrysafis, H. Georgiadis, C. Pikridas, V. Tsioukas, P. Patias, G. Mallinis

Proceedings Volume 13212, 1321214 (2024) https://doi.org/10.1117/12.3037300

KEYWORDS: Point clouds, Biodiversity, 3D applications, LIDAR, Unmanned aerial vehicles, Data processing, RGB color model, Georeferencing, Receivers, Satellite navigation systems

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Proceedings Article | 21 September 2023 Paper

Tropospheric monitoring using a low-cost GNSS receiver

C. Oikonomou, I.-A. Karolos, S. Bitharis, C. Pikridas, H. Haralambous

Proceedings Volume 12786, 127860K (2023) https://doi.org/10.1117/12.2680759

KEYWORDS: Satellite navigation systems, Receivers, Atmospheric modeling, Geodesy, Data modeling, Water, Meteorology, Troposphere, Environmental monitoring, Adverse weather

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Proceedings Article | 21 September 2023 Paper

Ionospheric monitoring using a low-cost GNSS receiver

C. Oikonomou, I.-A. Karolos, S. Bitharis, C. Pikridas, H. Haralambous

Proceedings Volume 12786, 127860L (2023) https://doi.org/10.1117/12.2681236

KEYWORDS: Receivers, Satellite navigation systems, Satellites, Geodesy, Global Positioning System, Space weather

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Proceedings Article | 6 August 2018 Paper

Coastal 3D mapping using very high resolution satellite images and UAV imagery: new insights from the SAVEMEDCOASTS project

Petros Patias, Charalampos Georgiadis, Marco Anzidei, Dimitrios Kaimaris, Christos Pikridas, Giorgios Mallinis, Fawzi Doumaz, Alessandro Bosman, Vincenzo Sepe, Antonio Vecchio

Proceedings Volume 10773, 107730V (2018) https://doi.org/10.1117/12.2325540

KEYWORDS: Satellites, Unmanned aerial vehicles, Image processing, Satellite imaging, Spatial resolution, Earth observing sensors, Image resolution, Clouds, Data processing, Orthophoto maps

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Global climate changes are a main factor of risk for infrastructures and people living along the coasts around the world. In this context, sea level rise, coastal retreat and storm surges pose serious threats to coastal zones. In order to assess the expected coastal changes for the next decades, a detailed knowledge of the site’s topography (coastline position, DTM, bathymetry) is needed. This paper focuses on the use of very high resolution satellite data and UAV imagery for the generation of accurate very-high and ultra-high mapping of coastal areas. In addition, the use of very high resolution multi-spectral satellite data is investigated for the generation of coastal bathymetry maps. The paper presents a study for the island of Lipari and the coasts of Cinque Terre (Italy) and the island of Lefkas (Greece). For Lefkas, two areas of the island were mapped (the city of Lefkas and its adjoining lagoon in the north side of the island, and the Bay of Vasiliki at the south part of the island) using World View 1, and Wolrd View 3 satellite images, and UAV imagery. The satellite processing provided results that demonstrated an accuracy of approximately 0.25 m plannimetrically and 0.70 m vertically. The processing of the UAV imagery resulted in the generation of DTMs and orthophotos with an accuracy of approximately 0.03-0.04 meters. In addition, for the Vasiliki bay in the south of the island the World View 3 imagery was used for the estimation of a bathymetry map of the bay. The achieved results yielded an accuracy of 0.4 m. For the sites of Lipari and Cinque Terre (both in Italy), UAV surveys allowed to extract a DTM at about 2 cm of pixel resolution. The integration of topographic data with high resolution multibeam bathymetry and expected sea level rise from IPCC AR5 2.6 and 8.5 climatic scenarios, will be used to map sea level rise scenarios for 2050 and 2100, taking into account the Vertical Land Motion (VLM) as estimated from CGPS data. The above-mentioned study was realized during the implementation of the SAVEMEDCOASTS project (Sea level rise scenarios along the Mediterranean coasts, funded by the European Commission ECHO A.5, GA ECHO/SUB/2016/742473/PREV16, www.savemedcoasts.eu).

Proceedings Article | 6 August 2018 Paper

BeRTISS project: Balkan-Mediterranean real-time severe weather service

H. Haralambous, C. Oikonomou, C. Pikridas, G. Guerova, T. Dimitrova, K. Lagouvardos, V. Kotroni, F. Tymvios

Proceedings Volume 10773, 1077313 (2018) https://doi.org/10.1117/12.2324129

KEYWORDS: Satellite navigation systems, Data modeling, Atmospheric modeling, Environmental sensing, Meteorology, Climate change, Climatology, Earth's atmosphere, Troposphere, Temperature metrology

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