THEODOROS KARACHALIOS

Mr. THEODOROS KARACHALIOS

orcid

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 February 2024 in Sensors
Verified
Journal Article
Open access
PDF file
TKTHEODOROS KARACHALIOS
THEODOROS KARACHALIOS
PMPanagiotis Moschos
Panagiotis Moschos
TOTheofanis Orphanoudakis
Theofanis Orphanoudakis
Maritime emissions contribute significantly to global pollution, necessitating accurate and efficient monitoring methods. Traditional methods for tracking ship emissions often face limitations in real-time data accuracy, with wind measurement being a critical yet challenging aspect. This paper introduces an innovative mission planner module for unmanned aerial vehicles (UAVs) that leverages onboard wind sensing capabilities to enhance maritime emission monitoring. The module’s primary objective is to assist operators in making informed decisions by providing real-time wind data overlays, thus optimizing flight paths and data collection efficiency. Our experimental setup involves the testing of the module in simulated maritime environments, demonstrating its efficacy in varying wind conditions. The real-time wind data overlays provided by the module enable UAV operators to adjust their flight paths dynamically, reducing unnecessary power expenditure and mitigating the risks associated with low-battery scenarios, especially in challenging maritime conditions. This paper presents the implementation of real-time wind data overlays on an open-source state-of-the-art mission planner as a C# plugin that is seamlessly integrated into the user interface. The factors that affect performance, in terms of communication overheads and real-time operation, are identified and discussed. The operation of the module is evaluated in terms of functional integration and real-time visual representation of wind measurements, and the enhanced situational awareness that it can offer to mission controllers is demonstrated. Beyond presenting a novel application of UAV technology in environmental monitoring, we also provide an extensive discussion of how this work will be extended in the context of complete aerial environmental inspection missions and the future directions in research within the field that can potentially lead to the modernization of maritime emission monitoring practices.

24 November 2023
Verified
Conference Paper
Open access
TKTHEODOROS KARACHALIOS
THEODOROS KARACHALIOS
PMPanagiotis Moschos
Panagiotis Moschos
AFAnastasios Fanariotis
Anastasios Fanariotis
TOTheofanis Orphanoudakis
Theofanis Orphanoudakis
With global environmental concerns reaching new heights, monitoring and quantifying gas emissions have become paramount. UAVs, due to their flexibility and adaptability, have emerged as a pivotal tool for this purpose. This paper endeavors to provide a comprehensive review and evaluation of the challenges and modern measurement techniques utilizing UAVs for gas emission assessments. Through a systematic study of relevant publications and technical reports, we review the current state-of-the-art systems and their applications in research and field missions. Additionally, we present a detailed discourse on the identified weaknesses and specificities of these UAV-based systems, elucidating potential avenues for enhancement.

29 November 2025 in Drones
Verified
Journal Article
Open access
PDF file
TKTHEODOROS KARACHALIOS
THEODOROS KARACHALIOS
TOTheofanis Orphanoudakis
Theofanis Orphanoudakis
Unmanned Aerial Vehicles (UAVs) can deliver rapid, spatially resolved measurements of volcanic gases that often precede eruptions, yet most deployments remain manual or preplanned and are slow to react to seismic unrest. In the present work, we present a simulation-validated design of an earthquake-triggered, autonomous workflow for early detection of CO2 anomalies, demonstrated through a conceptual case study focused on the Santorini caldera. The system ingests real-time seismic alerts, generates missions automatically, and executes a two-stage sensing strategy: a fast scan to build a coarse CO2 heatmap followed by targeted high-precision sampling at emerging hotspots. Mission planning includes wind-and terrain-aware flight profiles, geofenced safety envelopes and a facility-location approach to landing-site placement; in a Santorini case study, we provide a ring of candidate launch/landing zones with wind-contingent usage, illustrate adaptive replanning driven by heatmap uncertainty and outline calibration and quality-control steps for robust CO2 mapping. The proposed methodology offers an operational blueprint that links seismic triggers to actionable, georeferenced gas information and can be transferred to other island or caldera volcanoes.