Assistant Professor
Istanbul Technical University
Assistant ProfessorIstanbul Technical University
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2022 - now | |
Visiting ResearcherKTH Royal Institute of Technology
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August 2024 - October 2024 | |
Visiting ScholarUniversity of Colorado Boulder
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August 2019 - August 2020 | |
Research and Teaching AssistantIstanbul Medeniyet University
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2018 - 2022 | |
Visiting ScholarTampere University (of Technology)
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September 2017 - December 2017 | |
Research and Teaching AssistantIstanbul Technical University
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2015 - 2018 |
Principal InvestigatorResearch Starting Project (National) Istanbul Technical University Scientific Research Projects, Grant MAB-2022-44005
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18 October 2022 - Present | ||
Principal InvestigatorShort Term Research Project (National) Istanbul Technical University Scientific Research Projects, Grant FHD-2022-44012
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18 October 2022 - 8 March 2023 | ||
Principal Investigator1002 Short Term Research and Development Project (National) TUBITAK (The Scientific and Technological Research Council of Turkey), Grant 120M859
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February 2021 - February 2022 | ||
ResearcherPhD Thesis Project (National) Istanbul Technical University Scientific Research Projects, Grant 42097
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June 2019 - August 2021 | ||
ResearcherResearch and Development Project (National) Turkish Aerospace Industries (TAI), Grant TM3061
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July 2018 - October 2019 | ||
Scholar2532 Joint Research Project (International) TUBITAK (The Scientific and Technological Research Council of Turkey), Grant 113E595 Joint Project with RFBR (Russian Foundation for Basic Research)
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April 2014 - April 2016 | ||
TUBA-TEKNOFEST PhD Science Award, First Place, Turkish Academy of Sciences, 2022 .
Serhat Özyar Young Scientist of the Year Honorary Award, Orta Dogu Ogretim Elemanlari Dernegi, 2022 .
The Best Doctoral Thesis Award, Istanbul Technical University, 2021 .
Best Oral Presentation Award, 9th International Conference on Mechanical and Aerospace Engineering, 2018 .
Best Student Paper Award, 7th International Conference on Recent Advances in Space Technologies, 2015 .
YOK DOSAP Postdoctoral Research Program, KTH Royal Institute of Technology, Sweden (2 Months), August – September 2024. .
TUBITAK (The Scientific and Technological Research Council of Turkey) 2214-A PhD Thesis Research Scholarship, University of Colorado Boulder (6 Months), February 2020 - August 2020 .
Fulbright Visiting Student Researcher Program, University of Colorado Boulder (6 Months), August 2019 - February 2020 .
Finnish Government Scholarship for PhD Research at Department of Automation Science and Engineering, Tampere University of Technology, Tampere, Finland, September – December 2017 .
ASELSAN (Military Electronic Industries of Turkey) PhD Scholarship for Turkish Academicians (2017-2021) .
TUBITAK (The Scientific and Technological Research Council of Turkey) 2211-C PhD Scholarship (2017-2020) .
Scholarship for GNSS Summer School in Tokyo by Laboratory of Satellite Navigation, Tokyo University of Marine Science and Technology, 30 July – 4 August 2018 .
ISTS - JAXA Scholarship Program for Travel, 30th International Symposium on Space Technology and Science (ISTS 2015) in Kobe City, Hyogo Prefecture, Japan, 4 - 10 July 2015 .
UZB421E - Attitude Determination & Control Undergraduate (Since 2022 | Spring)
UZB352E - Orbital Mechanics Undergraduate (Since 2022 | Fall)
UUM517E - Spacecraft Dynamics Graduate (Since 2022 | Fall)
UUM532E - Spacecraft Control Systems Graduate (Since 2023 | Spring)
Turkish: Milli Savunma Üniversitesi - ATASAREN - Yörünge Mekaniği Yüksek Lisans (2023 sonrası | Güz ve Bahar)
Turkish: Milli Savunma Üniversitesi - Hava Harp Okulu - Yörünge Mekaniği Lisans (2022-2023 | Güz)
Attitude Estimation
Miniaturized Satellites
Formation Flying
Sensor Fusion
GNSS-based Localization
Visual Navigation
Space Environment Effects
C. Hajiyev, D. Cilden-Guler SVD-Aided UKF Adaptation for Nanosatellite Attitude Estimation under Uncertain Process Noise Conditions. Journal of Aerospace Engineering, 2025 (Accepted).
C. Hajiyev, D. Cilden-Guler Attitude filtering with uncertain process and measurement noise covariance using SVD-aided adaptive UKF. International Journal of Robust and Nonlinear Control, 33(17), pp. 10512-10531, DOI: 10.1002/rnc.6896, 2023.
D. Cilden-Guler, Z. Kaymaz, C. Hajiyev, Geomagnetic Storms in the Context of Spacecraft Attitude Estimation under Different Noise Levels. Advances in Space Research, 72(7), pp. 2733-2740, DOI: 10.1016/j.asr.2022.09.021, 2023.
C. Hajiyev, D. Cilden-Guler, Attitude and gyro bias estimation by SVD-aided EKF. Measurement, 205, 112209, DOI: 10.1016/j.measurement.2022.112209, 2022.
C. Hajiyev, D. Cilden-Guler, Nanosatellite attitude estimation in sun and eclipse periods without gyroscopes. Applied and Computational Mathematics, 21(3), pp. 246-258 DOI: 10.30546/1683-6154.21.3.2022.246, 2022.
C. Hajiyev, D. Cilden-Guler, Satellite Attitude Estimation using SVD-Aided EKF with Simultaneous Process and Measurement Covariance Adaptation. Advances in Space Research, 68(9), pp. 3875-3890, DOI: 10.1016/j.asr.2021.07.006, 2021.
D. Cilden-Guler, H. Schaub, C. Hajiyev, Z. Kaymaz, Attitude Estimation with Albedo Interference on Sun Sensor Measurements. Journal of Spacecraft and Rockets, 58(1), pp. 148-163, DOI: 10.2514/1.A34814, 2021.
D. Cilden-Guler, Z. Kaymaz, C. Hajiyev, Geomagnetic Disturbance Effects on Satellite Attitude Estimation. Acta Astronautica, 180, pp. 701-712, DOI: 10.1016/j.actaastro.2020.12.044, 2021.
C. Hajiyev, U. Hacizade, D. Cilden-Guler, Integration of barometric and GPS altimeters via adaptive data fusion algorithm. International Journal of Adaptive Control and Signal Processing, 35(1), pp. 2-14, DOI: 10.1002/acs.3184, 2021.
C. Hajiyev, D. Cilden-Guler, U. Hacizade, Two-Stage Kalman Filter for Fault Tolerant Estimation of Wind Speed and UAV Flight Parameters. Measurement Science Review, 20(1), pp. 35-42, DOI: 10.2478/msr-2020-0005, 2020.
D. Cilden-Guler, C. Hajiyev, SVD-aided EKF attitude estimation with UD factorized measurement noise covariance. Asian Journal of Control, 21(4), pp. 1423-1432, DOI: 10.1002/asjc.1979, 2019.
D. Cilden-Guler, M. Raitoharju, R. Piche, C. Hajiyev, Nanosatellite attitude estimation using Kalman-type filters with non-Gaussian noise. Aerospace Science and Technology, 92, pp. 66-76, DOI: 10.1016/j.ast.2019.05.055, 2019.
C. Hajiyev, H. E. Soken, and D. Cilden-Guler, Nontraditional Attitude Filtering with Simultaneous Process and Measurement Covariance Adaptation. Journal of Aerospace Engineering, 32(5), pp. 04019054-1-13, DOI: 10.1061/(ASCE)AS.1943-5525.0001038, 2019.
D. Cilden-Guler, Z. Kaymaz, C. Hajiyev, Evaluation of geomagnetic field models using magnetometer measurements for satellite attitude determination system at low earth orbits: Case studies. Advances in Space Research, 61(1), pp. 513-529. DOI: https://doi.org/10.1016/j.asr.2017.10.041, 2018.
D. Cilden Guler, E.S. Conguroglu, C. Hajiyev, Single-Frame Attitude Determination Methods for Nanosatellites. Metrology and Measurement Systems, 24, pp.313-324, DOI:10.1515/mms-2017-0023, 2017.
C. Hajiyev, and D. Cilden Guler, Review on gyroless attitude determination methods for small satellites. Progress in Aerospace Sciences, 90, pp.54-66, DOI: 10.1016/j.paerosci.2017.03.003, 2017.
D. Cilden, H.E. Soken, and C. Hajiyev, Nanosatellite Attitude Estimation from Vector Measurements using SVD-aided UKF Algorithm. Metrology and Measurement Systems, 24, pp.113-128, DOI: 10.1515/mms-2017-0011, 2017.
C. Hajiyev, D. Cilden, and Y. Somov, Gyro-free attitude and rate estimation for a small satellite using SVD and EKF. Aerospace Science and Technology, 55, pp.324-331, ISSN:1270-9638, DOI:10.1016/j.ast.2016.06.004, 2016.
D. Cilden-Guler, A. Kutlu, C. Hajiyev Verification of Attitude Determination and Control Algorithms using Air-Bearing Test Table. Gyroscopy and Navigation, 15, pp. 51-59, 2024.
A. T. Balkir, D. Cilden-Guler, Taking Advantage of Geomagnetic Storms for B-Dot Attitude Control in Small Satellites. Journal of Aeronautics and Space Technologies, 17, Special Issue, pp. 47–64, 2024.
D. Cilden-Guler, C. Hajiyev SVD-Aided EKF for Nanosatellite Attitude Estimation Based on Kinematic and Dynamic Relations. Gyroscopy and Navigation, 14, pp. 366-379, DOI: 10.1134/S2075108724700081, 2023.
D. Cilden-Guler, Sun-Direction Estimation Under the Effect of Lunar Albedo. Journal of Aeronautics and Space Technologies, 15, No.2, pp. 13-27, 2022.
D. Cilden-Guler, C. Hajiyev, J. Dasdemir, Fault Tolerant Control of Attitude Dynamics of Nanosatellites. International Journal of Sustainable Aviation (IJSA), 4, No.2, pp. 99-113, DOI: 10.1504/IJSA.2018.10015446, 2018. (ESCI Index)
D. Cilden Guler, C. Hajiyev, Singular Value Decomposition Based Satellite Attitude Determination Using Different Sensor Configurations. International Journal of Metrology and Quality Engineering, EDP Sciences, 8 (15), DOI:10.1051/ijmqe/2017010, 2016. (Scopus Index)
C. Hajiyev, and D. Cilden, Nontraditional Approach to Satellite Attitude Estimation. International Journal of Control Systems and Robotics, 1, pp.19-28, ISSN:2367-8917, 2016. (Engineering Index)
D. Cilden Guler, C. Hajiyev, Gyroless Attitude Determination of Nanosatellites . LAP LAMBERT Academic Publishing, ISBN:978-3-330-04781-5, 2017.
H.E. Soken, D. Cilden, C. Hajiyev, Chapter 26: Integration of Single-Frame and Filtering Methods for Nanosatellite Attitude Estimation . Multisensor Attitude Estimation: Fundamental Concepts and Applications, CRC Press, ISBN 9781498745710, 2016.
D. Cilden-Guler, A Critical Assessment of Spacecraft Attitude Stability and Control under Harsh Space Environment Conditions in New Generation Photovoltaics for Space (PVSPACE-24). 15-18 October 2024: Istanbul, Turkiye (Invited Speaker).
F. Şevik, D. Cilden-Guler, LSM-Aided Estimation Filter based Geostationary Satellite Navigation with Available GNSS Signals in 11th International Workshop on Metrology for AeroSpace (MetroAeroSpace). 03-05 June 2024: Lublin, Poland.
D. Cilden-Guler, Z. Kaymaz, and C. Hajiyev, General Overview of Near-Earth Magnetic Anomaly Effects on Satellite Attitude Estimation in 74th International Astronautical Congress. 2-6 October 2023: Baku, Azerbaijan.
C. Hajiyev, D. Cilden-Guler, Nanosatellite Attitude Estimation with Uncertain Process and Measurement Noise Using Nontraditional Filtering in 74th International Astronautical Congress. 2-6 October 2023: Baku, Azerbaijan.
A.T. Balkir, D. Cilden-Guler, External Magnetic Field Contributions to B-Dot Attitude Control of a Nanosatellite in 10th International Conference on Recent Advances in Air and Space Technologies. 7-9 June 2023: Istanbul, Turkey.
C. Hajiyev, D. Cilden-Guler, Multiple Fading Factors Based Adaptive SVD-aided UKF for Small Satellite Attitude Estimation in 10th International Conference on Recent Advances in Air and Space Technologies. 7-9 June 2023: Istanbul, Turkey.
C. Hajiyev, D. Cilden-Guler, Nontraditional Attitude Filtering with Uncertain Process Noise in ISUDEF'23 International Symposium on Unmanned Systems: AI, Design and Efficiency. 7-9 June 2023: Stockholm, Sweden (Keynote Speaker).
D. Cilden-Guler, Impact of Earth's Reflected Radiation on Attitude Motion of a Nanosatellite in 11th Nano-Satellite Symposium. 17-19 October, 2022, Istanbul, Turkey.
D. Cilden-Guler, C. Hajiyev, SVD-Aided EKF for Nanosatellite Attitude Estimation based on Kinematic Relations in International Symposium on Aircraft Technology, MRO & Operations (ISATECH). 28-30 June 2021: Budapest, Hungary (online).
C. Hajiyev and D. Cilden-Guler, SVD-Aided EKF with Process Noise Covariance Adaptation Applied to Satellite Attitude Dynamics in CEUR Workshop Proceedings of the Fourth International Workshop on Computer Modeling and Intelligent Systems (CMIS-2021). 27 April 2021: Zaporizhzhia, Ukraine (online).
D. Cilden Guler, Z. Kaymaz, and C. Hajiyev, Are External Magnetic Disturbances Suppressed by Magnetometer Noise when Estimating a Nanosatellite’s Rotational Motion? in 21st IFAC World Congress - 1st Virtual IFAC World Congress. 11-17 July 2020: Berlin, Germany (online).
C. Hajiyev, D. Cilden Guler, and U. Hacizade, EKF for Wind Speed Estimation and Sensor Fault Detection Using Pitot Tube Measurements in 9th International Conference on Recent Advances in Space Technologies. 11-14 June 2019: Istanbul, Turkey.
C. Hajiyev, D. Cilden Guler, and U. Hacizade, Two-Stage Kalman Filter for Estimation of Wind Speed and UAV Flight Parameters Based on GPS/INS and Pitot Tube Measurements in 9th International Conference on Recent Advances in Space Technologies. 11-14 June 2019: Istanbul, Turkey.
C. Hajiyev, U. Hacizade, and D. Cilden Guler, Data Fusion for Integrated Baro/GPS Altimeter in 9th International Conference on Recent Advances in Space Technologies. 11-14 June 2019: Istanbul, Turkey.
D. Cilden Guler, Z. Kaymaz and C. Hajiyev, Assessment of Magnetic Storm Effects under Various Magnetometer Noise Levels for Satellite Attitude Estimation in 9th International Conference on Recent Advances in Space Technologies. 11-14 June 2019: Istanbul, Turkey.
D. Cilden Guler, and C. Hajiyev, UD Factorization Based Non-Traditional Attitude Estimation of Nanosatellite with Rate Gyros FDI in 18th IFAC International Conference on International Stability, Technology and Culture (TECIS), 13-15 September 2018, Baku, Azerbaijan. (Published in: IFAC-PapersOnLine, vol. 51, no. 30, pp. 95–100, Jan. 2018)
C. Hajiyev, and D. Cilden Guler, Gyroless Nanosatellite Attitude Estimation in Loss of Sun Sensor Measurements in 18th IFAC International Conference on International Stability, Technology and Culture (TECIS), 13-15 September 2018, Baku, Azerbaijan. (Published in: IFAC-PapersOnLine, vol. 51, no. 30, pp. 89–94, Jan. 2018)
D. Cilden Guler, Z. Kaymaz, and C. Hajiyev, Attitude Estimation of Small Satellites in Consideration of Geomagnetic Field Anomalies in 42nd COSPAR Scientific Assembly, 14-22 July 2018, Pasadena, California, USA. (Poster)
D. Cilden Guler, and C. Hajiyev, Attitude Estimation by SVD/EKF using Reformed Measurements and Decomposed Noise Covariance in 9th International Conference on Mechanical and Aerospace Engineering (ICMAE). 10-13 July, 2018, Budapest, Hungary.
A. Kutlu, D. Cilden Guler, and C. Hajiyev, Test Platform for Small Satellite Attitude Determination and Control System in 9th International Conference on Mechanical and Aerospace Engineering (ICMAE). 10-13 July, 2018, Budapest, Hungary. (Best Oral Presentation Award)
C. Hajiyev, H.E. Soken, D. Cilden Guler, Q-Adaptation of SVD-Aided UKF Algorithm for Nanosatellite Attitude Estimation in 20th World Congress of the International Federation of Automatic Control (IFAC), 9-14 July 2017: Toulouse, France.
D. Cilden Guler, and C. Hajiyev, Integrated SVD/EKF for Nano-satellite Attitude Determination In The Case Of Magnetometer Faults in 7th European Conference for Aeronautics and Space Sciences (EUCASS). 3-6 July, 2017: Milan, Italy.
D. Cilden Guler, Z. Kaymaz, and C. Hajiyev, Geomagnetic Models at Low Earth Orbit and Their Use in Attitude Determination in 8th International Conference on Recent Advances in Space Technologies. pp.301-305, DOI:10.1109/RAST.2017.8003011, 19-22 June 2017: Istanbul, Turkey.
D. Cilden Guler and C. Hajiyev, Integrated SVD/EKF Attitude Estimation with UD Factorization of the Measurement Noise Covariance in 8th International Conference on Recent Advances in Space Technologies. pp.343-348, DOI:10.1109/RAST.2017.8002963, 19-22 June 2017: Istanbul, Turkey.
D. Cilden Guler, J. Dasdemir, and C. Hajiyev, Fault Tolerant Control of Attitude Dynamics of Nano Satellites in 8th International Conference on Recent Advances in Space Technologies. pp.349-353, DOI:10.1109/RAST.2017.8002964, 19-22 June 2017: Istanbul, Turkey.
C. Hajiyev, D. Cilden Guler, and Y. Somov, Attitude Determination of Nanosatellites in the Sun-Eclipse Phases in 8th International Conference on Recent Advances in Space Technologies. pp.397-401, DOI:10.1109/RAST.2017.8002990, 19-22 June 2017: Istanbul, Turkey.
H.E. Soken, C. Hajiyev, and D. Cilden Guler, Nontraditional UKF Based Nanosatellite Attitude Estimation with the Process and Measurement Noise Covariances Adaptation in 8th International Conference on Recent Advances in Space Technologies. pp.381-386 DOI:10.1109/RAST.2017.8003009, 19-22 June 2017: Istanbul, Turkey.
D. Cilden Guler, H.E. Soken, and C. Hajiyev, Non-Traditional Robust UKF Against Attitude Sensors Faults in 31th International Symposium on Space Technology and Science (ISTS). 3-9 June, 2017: Himegin Hall, Matsuyama-Ehime, Japan.
D. Cilden, and C. Hajiyev, Attitude Determination and Uncertainty Analysis in Eclipse of Small LEO Satellites in SIAM Conference on Uncertainty Quantification. 4-8 April 2016: Lausanne, Switzerland.
Y. Cay, D. Cilden, A. Mirzai, N. Genckal, E. Aydin, I. Kirci, Uzay Ortaminda Gaz Giderme Laboratuvari, Mikrouydu Gorevi ISOLDE (In-Space Outgassing Laboratory Microsatellite Mission ISOLDE) in 6. Ulusal Havacilik ve Uzay Konferansi (UHUK). 28-30 Sept 2016: Kocaeli, Turkey.
D. Cilden, J. Daşdemir, and C. Hacızade, Uydunun Dönme Hareketinin Arıza Toleranslı Kontrolü (Fault Tolerant Control of the Satellite’s Rotational Motion) in Otomatik Kontrol Ulusal Toplantisi (TOK). 29 Sept - 1 Oct 2016: Eskisehir, Turkey.
C. Hajiyev, D. Cilden, and Y. Somov, Integrated SVD/EKF for Small Satellite Attitude Determination and Rate Gyro Bias Estimation in Workshop on Advanced Control and Navigation for Autonomous Aeroespace Vehicles (ACNAAV). Seville, Spain.
C. Hajiyev, D. Cilden, and Y. Somov, Gyroless Attitude and Rate Estimation of Small Satellites Using Singular Value Decomposition and Extented Kalman Filter, in 16th International Carpathian Control Conference (ICCC). 2015: Szilvásvárad, Hungary.
D. Cilden, Z. Kaymaz, and C. Hajiyev, Comparison of Geomagnetic Field from Models and Satellite Observations for Attitude Determination Purposes in 7th International Conference on Recent Advances in Space Technologies-RAST. 2015: Istanbul, Turkey.
D. Cilden, E.S. Conguroglu, and C. Hajiyev, Covariance Analysis of Three-Axis Attitude Determination Using Two Vector Measurements in 7th International Conference on Recent Advances in Space Technologies-RAST. 2015: Istanbul, Turkey.
D. Cilden, Z. Kaymaz, and C. Hajiyev, Extraterrestial Magnetic Field Effects on Attitude Determination Accuracy of Small Satellites in 7th International Conference on Recent Advances in Space Technologies-RAST. 2015: Istanbul, Turkey.
D. Cilden, H.E. Soken, and C. Hajiyev, Attitude and Attitude Rate Estimation for a Nanosatellite Using SVD and UKF in 7th International Conference on Recent Advances in Space Technologies-RAST. 2015: Istanbul, Turkey (Best Student Paper Award).
C. Hajiyev and D. Cilden. Integrated SVD/EKF for Small Satellite Attitude and Rate Estimation in 6th European Conference for Aeronautics and Space Sciences (EUCASS). 2015. Krakow, Poland.
D. Cilden and C. Hajiyev. Error Analysis of the Vector Measurements Based Attitude Determination Methods for Small Satellites in International Symposium on Space Technology and Science (ISTS). 2015. Kobe, Hyogo, Japan.
H.E. Soken, D. Cilden, and C. Hajiyev. Attitude Estimation for Nanosatellites Using Singular Value Decomposition and Unscented Kalman Filter in International Symposium on Space Technology and Science (ISTS). 2015. Kobe, Hyogo, Japan.
D. Cilden and C. Hajiyev. Attitude Determination with Two and Three Vector Configurations on Small Satellites in V. UHUK. 8-10 September 2014: Kayseri, Turkey, (in Turkish).
D. Cilden and C. Hajiyev. Attitude Determination Methods Using Vector Observations in Small Satellite Journal of Aeronautics and Space Technologies, 2014. 7(2): p. 35-43, (in Turkish).
E. Yakut, D. Cilden, C. Oran, and E. Erdogan. Meteorological Observations and Establishing a Base for Future Mars Missions in International Planetary Probe Workshop 11. 2014: Pasadena, California, USA.
D. Cilden, E. Yakut, and C. Oran. CubeSat Technology on Titan Exploration in International Planetary Probe Workshop 10. 2013: San Jose, California, USA.