{"basics":{"name":"Anastasios-Faidon Retselis","label":"Computational Physicist & Space Systems Engineer","picture":"https://media.licdn.com/dms/image/D4D03AQHJrUwFYpURWg/profile-displayphoto-shrink_800_800/0/1666862056281?e=1718841600&v=beta&t=1Zit3QMFU4vVREMSTaelywJgq3NEDU3NZjtBNIrQBQI","email":"anastasis@retsel.is","website":"https://retsel.is","summary":"Hello! My name is Anastasis. I am a trained physicist specializing in astrodynamics applications and space systems engineering. I enjoy the challenges involved with designing & operating systems in space and I am always looking for opporunities to expand and apply my knowledge.\n","location":{"city":"Thessaloniki","countryCode":"GR"},"profiles":[{"network":"LinkedIn","username":"Anastasios-Faidon Retselis ","url":"https://www.linkedin.com/in/retselis"},{"network":"Gitlab","username":"retse ","url":"https://gitlab.com/retse"},{"network":"GitHub","username":"aretselis ","url":"https://github.com/aretselis"}]},"work":[{"company":"Satellogic","position":"Flight Dynamics Flight Engineer","website":"https://satellogic.com/","startDate":"2022-5-01","endDate":"","summary":"Flight Dynamics Engineer within the Mission & Operations department, ensuring that the Aleph constellation of 35+ satellites is in position to capture high-resolution imagery of our planet.\n","highlights":["Planning and execution of <b>orbital maneuvers</b> for orbit acquisition, station keeping and collision avoidance","Implementation of <b>monitoring & alerting</b> applications for operational purposes","Troubleshooting of issues related to the <b>propulsion system</b> of the satellites","Development of in-house <b>notebooks and libraries in Python and Julia</b> for the automation of processes","Development of an <b>autonomous collision avoidance framework</b> for the entire constellation","<b>Research activities</b> to better understand the performance of the satellites and to expand their capabilities","<b>Optimization</b> of maneuvering framework to ensure minimum disruption to nominal operations and efficient maneuvering","Thorough analysis and <b>development of a framework to monitor the pointing performance</b> of the satellites"]},{"company":"PeakSat project (SpaceDot)","position":"Technical Advisor","website":"https://peaksat.spacedot.gr/","startDate":"2023-05-01","endDate":"2023-12-31","summary":"Technical Advisor for the PeakSat optical communications CubeSat project, which is part of the ESA-funded \"Greek CubeSats In-Orbit Validation\" program. \n","highlights":["Co-authoring the proposal submitted to ESA","Early <b>system design & requirements</b> definition","Performance <b>analysis focused on orbital dynamics & power domains</b>","Technical Consulting"]},{"company":"AcubeSAT Project (SpaceDot)","position":"Lead Systems Engineer","website":"https://acubesat.spacedot.gr/","startDate":"2019-2-01","endDate":"2022-8-01","summary":"Head of the Systems Engineering team for the AcubeSAT project, a 3U CubeSat state-of-the-art biology mission by the Aristotle University of Thessaloniki, supported by the European Space Agency's “[Fly Your Satellite!](https://www.esa.int/Education/CubeSats_-_Fly_Your_Satellite)” programme.\n","highlights":["Definition of the system level <b>requirements</b> for the spacecraft","Implementation of the <b>concurrent engineering</b> method using relevant tools (OCDT) and hosting over 30 concurrent design sessions","Supervision of the <b>system design</b> and its compliance with requirements and tailored ECSS standards","Development of in-house <b>python scripts</b> for power budget and reliability evaluations","Definition of the <b>Manufacturing, Assembly, Integration and Verification Plan (MAIVP)</b> for the entire spacecraft","Implementation of <b>Failure Mode Effect Analysis (FMEA)</b> and derivation of compensating provisions for critical items","<b>Collaboration</b> with other engineers within the team and external parties for the resolution of technical issues in a fast-paced environment"]},{"company":"AcubeSAT Project (SpaceDot)","position":"AOCS subsystem coordinator","website":"https://acubesat.spacedot.gr/","startDate":"2018-2-01","endDate":"2019-2-01","summary":"Member and coordinator of the Attitude Determination and Orbit Control subteam during the conceptual phase of the AcubeSAT project. \n","highlights":["<b>Prototyping and development</b> of a reaction wheel control system planned for AcubeSAT using Arduino and in-house developed hardware","Early <b>mission analysis and orbit definition</b> for the AcubeSAT mission, using a variety of computational tools and theoretical concepts","Trade-off analysis and definition of the <b>preliminary physical architecture</b> of the ADCS subsystem"]}],"education":[{"institution":"Aristotle University of Thessaloniki","area":"Computational Physics","studyType":"Master","startDate":"2020-11-01","endDate":"2022-07-08","gpa":"9.53/10","courses":["<b>MSc Thesis:</b> Image-based orbit determination of the Didymos-Dimorphos binary asteroid system using the Hera spacecraft","<b>Relevant coursework:</b> Computational Dynamics, Astrodynamics and Applications, Computational Mathematics I & II, Data Analysis and Processing using MATLAB","<b>Activities:</b> Teaching assistant for the elective course **Systems Reliability** at the School of Electrical and Computer Engineering"]},{"institution":"Aristotle University of Thessaloniki","area":"Physics","studyType":"Degree","startDate":"2016-09-01","endDate":"2020-11-01","gpa":"8.05/10","courses":["<b>BSc Thesis:</b> Orbital analysis and the spin-orbit coupling problem for the AcubeSAT mission","<b>Relevant coursework:</b> Computational Physics and Applications, Metrology and Quality Systems, Telecommunication systems, Electronic Circuits","<b>Activities:</b> Teaching assistant for the courses Mathematics I and Physics III (Electricity-Magnetism) at the School of Physics"]}],"publications":[{"name":"Image-based orbit determination of the Didymos-Dimorphos binary asteroid system using the Hera spacecraft","publisher":"A. F. Retselis","releaseDate":"2022-07-08","website":"https://doi.org/10.26262/heal.auth.ir.341036","summary":"My master thesis for the MSc degree in Computational Physics, where I explored a method to determine the orbit of Didymos-Dimorphos using simulated images taken from the Hera spacecraft."},{"name":"Adaptation of the AcubeSAT nanosatellite project into remote working during the COVID-19 era","publisher":"A. F. Retselis, T. Papafotiou and K. Kanavouras","releaseDate":"2022-04-29","website":"https://upcommons.upc.edu/bitstream/handle/2117/370699/SSEA_2022_219.pdf?sequence=1","summary":"A conference paper for the 4th Symposium on Space Educational Activities where the transition to remote work for the AcubeSAT project is detailed."},{"name":"Orbital analysis and the spin-orbit coupling problem for the AcubeSAT mission","publisher":"A. Anthopoulos and A. F. Retselis","releaseDate":"2020-10-13","website":"https://ikee.lib.auth.gr/record/324721","summary":"My bachelor thesis for the Degree in Physics, where we explored the orbital analysis for the AcubeSAT mission and the possibility of using the spin-orbit coupling problem for the design of the spacecraft."}],"skills":[{"name":"Programming","level":"Professional","keywords":["C","C++","Python","Julia","OpenMP"]},{"name":"Scientific Programming","level":"Expert","keywords":["MATLAB","Wolfram Language","Jupyter Notebooks"]},{"name":"Astrodynamics","level":"Expert","keywords":["System Toolkit (STK)","General Mission Analysis Tool (GMAT)","Numerical Methods"]},{"name":"Space Systems Engineering","level":"Expert","keywords":["System Toolkit (STK)","Concurrent Engineering","Requirements Engineering","Cost & trade-off analysis"]}],"languages":[{"language":"Greek","fluency":"Native speaker"},{"language":"English","fluency":"Native or bilingual proficiency"},{"language":"German","fluency":"Full professional proficiency"},{"language":"Spanish","fluency":"Elementary proficiency"}]}