Publications

Journal Papers

• Kunalakantha, P., Suthakar, V., Harrison, P., Driedger, M., Qashoa, R., Chianelli, G., & Lee, R. S. (2026). Resident Space Object (RSO) Tracking in Space-Based, Low Resolution, Non-Constant-Attitude Imagery. Remote Sensing, 18(5), 755. Link
• Hwang, M., Suthakar, V., Qashoa, R., Lee, R. S., & Sohn, G. (2026). Light-Curve Classification of Resident Space Objects for Space Situational Awareness: A Scoping Review. Aerospace, 13(3), 287. Link
• V. Suthakar, P. Kunalakantha, R. S. K. Lee, G. Sohn “DUST: An On-Orbit Start-Tracker Benchmark for RSO Detection and Attitude Estimation”. Scientific Data, Dec. 17, 2025.
• V. Suthakar, I. Porto, M. Myhre, A. A. Sanvido, R. Clark, and R. S. K. Lee, “RSONAR: Data-driven evaluation of dual-use star tracker for stratospheric space situational awareness (SSA),”Sensors, vol. 26, no. 1, p. 179, 2025. Link
• Jeong, V. Suthakar, R. Qashoa, G. Sohn, and R. S. K. Lee, “OrbitTrack: Advanced RSO detection and tracking from wide field-of-view on-orbit images,”Advances in Space Research, 2025. Link
• Porras-Hermoso A, Qashoa R, Lee RS, Cubas J, Pindado S. On the Space Observation of Resident Space Objects (RSOs) in Low Earth Orbits (LEOs). Remote Sensing. 2025 Aug 15;17(16):2844. Link

Conference Papers

• R. Alli, V. Suthakar, D. Dobrzanski, and R. S. K. Lee, “Near-Space Technology Demonstration for Low Earth Orbit (LEO) Space Situational Awareness,” in Proceedings of the Canadian CubeSat Conference, 2026.
• R. Alli, V. Suthakar, D. Dobrzanski, and R. S. K. Lee, “A stratospheric SSA payload for identifying resident space objects (RSO),” inProceedings of the 2026 Canadian Space Conference, Ottawa, ON, Canada, Jan. 23–25, 2026.
• M. Myhre, I. Porto, V. Suthakar, and R. S. K. Lee, “Centroid Algorithm Comparison in a Dual-Use Star Tracker for Space Situational Awareness,” in Proceedings of the 5th IAA Conference on Space Situational Awareness, 2025.
• I. Porto, M. Myhre, V. Suthakar, and R. S. K. Lee, “Thermo-Optical Characterization and Qualification of a Space Situational Awareness (SSA) Payload,” in Proceedings of the 5th IAA Conference on Space Situational Awareness, 2025.
• V. Suthakar and R. S. K. Lee, "AI-Driven Detection of Resident Space Objects (RSOs) Using Monochromatic Wide Field Imaging for Space Situational Awareness," in Proceedings of the Global Space Exploration Conference (GLEX), 2025. Link
• V. Suthakar, A. A. Sanvido, M. Vellani, E. Brown, and R. S. K. Lee, "ORBIT: Open-source Research for Better Identification and Tracking of Space Objects," in Proceedings of SpaceOps, 2025 Link
• V. Suthakar, I. Porto, S. K. M. Dasanayaka, R. S. K. Lee, M. I. Robert, R. Olteanu, A. Bucur, M. Kubler, J. I. Hubbard, M. Scherillo, F. Newland, and V. Braun "Stratospheric Observation of Resident Space Objects Using Photometric and Infrared Sensors," in Proceedings of the 9th European Conference on Space Debris, 2025. Link

Journal Papers

• Qashoa, R., Suthakar, V., Chianelli, G., Kunalakantha, P., & Lee, R. S. K. (2024). Technology Demonstration of Space Situational Awareness (SSA) Mission on Stratospheric Balloon Platform. Remote Sensing, 16(5), 749. Link
• Soh, W., and Lee, R., “A New Agile Nanosatellite Tracking Control Using a Dual Use Resident Space Object Star Tracker Camera,” AIAA Journal of Spacecraft and Rockets. (under review) 2024.
• Chianelli, G.; Kunalakantha, P.; Myhre, M.; Lee, R.S.K. A Dual-Purpose Camera for Attitude Determination and Resident Space Object Detection on a Stratospheric Balloon. Sensors 2024, 24, 71. Link
• Qashoa R, Harrison P, Lee R. Wide Field of View (FOV) imagers for co-orbiting object detection. InProceedings of the Advanced Maui Optical and Space Surveillance (AMOS) Technologies Conference 2024 Sep. Link
• Qashoa R, Driedger M, Clark R, Harrison P, Berezin M, Lee R, Howarth A. SPACEDUST-Optical: Wide-FOV Space Situational Awareness from Orbit. InProceedings of the Advanced Maui Optical and Space Surveillance (AMOS) Technologies Conference 2023 Sep (pp. 19-22) Link
• Qashoa R, Lee RS, Clark R. RSO Simulations with Anti-Sun Pointing Predictions. InProceedings of the Advanced Maui Optical and Space Surveillance (AMOS) Technologies Conference 2023 Sep (p. 159). Link
• R. Qashoa and RSK. Lee, “Classification of Low Earth Orbit (LEO) Resident Space Objects (RSO) Light Curves Using Support Vector Machine (SVM) and Long Short-Term Memory (LSTM)”, Sensors 2023, 23(14), 6539. Link
• P. Kunalakantha, A. Vallecillo Baires, S. Dave, R. Clark, G. Chianelli and R.S.K. Lee, “Stratospheric Night Sky Imaging Payload for Space Situational Awareness (SSA),” Sensors 2023, 23, 6595 Link

Conference Papers

• Jeong Y, Qashoa R, Lee RS, Sohn G. OrbitNet: Advanced 2D Keypoint-Based Detection and Tracking of LEO Resident Space Objects Using Deep Convolutional Neural Network. 45th COSPAR Scientific Assembly. Held 13-21 July. 2024 Jul;45:2617.

Journal Papers

• Dave S, Clark R, Lee R. RSOnet: An Image-Processing Framework for a Dual-Purpose Star Tracker as an Opportunistic Space Surveillance Sensor. Sensors. 2022; 22(15):5688. Link
• Clark R, Fu Y, Dave S, Lee R. Simulation of RSO Images for Space Situation Awareness (SSA) Using Parallel Processing. Sensors. 2021; 21(23):7868. Link
• A. Frias, J. Lee, R. Lee, W. Soh, “Pseudospectral Model Predictive Control of Spacecraft Detumbling using Magnetic Actuation,” Under Review: Journal of Aerospace Engineering, October 2021.
• R. Clark, Y. Fu, S. Dave, R. Lee, “Resident Space Object (RSO) Attitude and Optical Property Estimation from Space-Based Light Curves,” Submitted: Advances in Space Research, September, 2021.
• J. Lee, S. Bisnath, R. Lee and N. Kiliane, “Computation approach for Quantitative Dielectric Constant from Time Sequential Data Observed by CYGNSS satellites,” Journal of Remote Sensing, May 2021.
• T. Joseph, G. Benari, H. Podmore, R. Lee, “Assessing Reaction Wheel Sizing for CubeSat Attitude Control,” Journal of Small Satellite (JoSS), Vol. 10, No. 2, pp. 1007–1014, 2021.
•  F. Diriker, A. Frias, K.H. Keum, R. Lee, “Improved Accuracy of a Single-Slit Digital Sun Sensor Design for CubeSat Application Using Sub-Pixel Interpolation,” Sensors 2021, 21(4), 1472. DOI:10.3390/s21041472.https://www.mdpi.com/1424-8220/21/4/1472
• K. Bolshakov, F. Diriker, R. Clark, R. Lee, H. Podmore, “Array-based Digital Sun sensor Design for CubeSat Application,” Acta Astronautica, Volume 178, January 2021, Pages 81-88. https://doi.org/10.1016/j.actaastro.2020.08.005

Conference Papers

• Dave, S., Lee, R. (2022). Feasibility of a Virtual Constellation using Small Aperture, Wide Field of View Optical Systems for Space Domain Awareness and Applications.   Advanced Maui Optical and Space Surveillance Technologies Conference, Maui, HI, USA, 27-31 September 2022.
• R. Clark, S. Dave, R. Lee, “RSO Attitude and Optical Property Estimation from Space-Based Light Curves,” 43rd COSPAR Scientific Assembly, B0.2-0008-21, Australia, (2021).
• Dave, S., Clark, R., Chianelli, G., & Lee, R. (2020). Machine learning implementation for in-orbit RSO orbit estimation using star tracker cameras. Advanced Maui Optical and Space Surveillance Technologies Conference, Maui, HI, USA, 27-30 September 2020. Retrieved from https://amostech.com/TechnicalPapers/2020/Machine-Learning-Applications-of-SSA/Dave.pdf
• Dave, S., Clark, R., Chianelli, G., & Lee, R. (2020). RSO position and velocity estimation using Convolutional Neural Networks from in-orbit star tracker images. Committee on Space Research Conference, Virtual, 28 January - 4 February 2021.

Journal Papers

• Ryan Clark, Regina Lee, “Parallel Processing for Orbital Maneuver Detection,” Advances in Space Research, 66, 2, 7 2020. https://doi.org/10.1016/j.asr.2020.04.010
• Dukhang Lee, John Moores, Tom Young, Hugh Podmore, Regina Lee, “Conceptual Thermal Design of neoPASCAL: A Network of Landed Sensors on Mars,” International Journal of Space Science and Engineering, January, 2020.
• Yaoze Liu, Mohammad Soltani, Ripon Kumar Dey, Bo Cui, Regina Lee, and Hugh Podmore “Moth-eye Antireflection Nano-structure on Glass for CubeSats,” Journal of Vacuum Science & Technology B, 36, 06JG01 (2018), 2018. https://avs.scitation.org/doi/10.1116/1.5050986 
• Hugh Podmore, Alan Scott, Regina Lee, "On-chip compressed sensing Fourier-transform visible spectrometer,” IEEE Photonics Journal, PP(99):1-1 · October 2018. https://ieeexplore.ieee.org/document/8502925 
• Sowmya Natesan, Costas Armenakis, Guy Benari and Regina Lee, “Use of UAV-Borne Spectrometer for Land Cover Classification,” Drones 2018, 2(2), 16. https://www.mdpi.com/2504-446X/2/2/16 

Conference Papers

• A. Chauhan, R. Lee, “Exploring a Silicon on Insulator based Integrated Optical Chip for Interferometric Fiber Optic Gyroscopes,” Photonics North paper # 255-FTmC-23 (2020).
• S. Dave, R. Clark, R. Lee, “Machine learning implementation for in-orbit RSO orbit estimation using star tracker cameras,” AMOSTech Conference, ID: 20297, Hawaii, (2020).
• Samuel Clemens, Regina Lee, Paul Harrison, Warren Soh, “Feasibility of Using Commercial Star Trackers for On-Orbit Resident Space Object Detection,” Advanced Maui Optical and Space Surveillance Technologies Conference (AMOS), Hawaii, September 2018.   https://amostech.com/TechnicalPapers/2018/Space-Based_Assets/Clemens.pdf 
• Y. Liu, M. Soltani, B. Cui, H. Podmore, and R. Lee, “Moth-eye antireflection nano-structure on glass for CubeSats”,62ed International Conference on Electron, Ion and Photon Beam Technology and Nano-fabrication (EIPBN), Puerto Rico, May 2018.  https://avs.scitation.org/doi/10.1116/1.5050986 
• H. Podmore, A. Scott, R. Lee, “A compressive sensing Fourier-transform on-chip Raman spectrometer, SPIE Photonics West (2018)   https://spie.org/Publications/Proceedings/Paper/10.1117/12.2288375?SSO=1 

Posters

• Junchan Lee, Surabhi Guruprasad, Sunil Bisnath, Regina Lee, “A direct approach to calculate quantitative dielectric constant for GNSS-R,” IEEE Specialist Meeting on Reflectometry using GNSS and other Signals of Opportunity, May, 2019 - Benevento, Italy 
• Surabhi Guruprasad, Junchan Lee, Sunil Bisnath, Regina Lee, “Real-time reconfigurable GNSS-R receiver for space,” IEEE Specialist Meeting on Reflectometry using GNSS and other Signals of Opportunity, May, 2019 - Benevento, Italy 
• Chiti Ran, Alexander Frias, Regina Lee, “A Comparison Study on Control Moment Gyroscope Arrays and Steering Laws for Micro-satellites,” accepted for presentation at 32nd Annual AIAA/USU Conference on Small Satellites, August, 2019. 

Journal Papers

• H. Podmore, A. Scott, P. Cheben, C. Sioris, P. Cameron, J. H. Schmid, A. Lohmann, Z. Corriveau, R. Lee, “Athermal planar-waveguide Fourier-transform spectrometer for methane detection,” Opt. Express 21 Oct, (2017) https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-26-33018 
• Lee, Daero, Vukovich, George and Lee, Regina, " Robust adaptive unscented Kalman filter for spacecraft attitude estimation using quaternion measurements,” Journal of Aerospace Engineering, Vol. 30, Issue 4, July 2017. https://www.semanticscholar.org/paper/Robust-Adaptive-Unscented-Kalman-Filter-for-Using-Lee-Vukovich/d0464a1bf4da2730834d8a2e3e10ac8a2d3900ca 
• H. Podmore, A. Scott, P. Cheben, A. V. Velasco, J. H. Schmid, M. Vachon, R. Lee, “Demonstration of a compressive-sensing Fourier-transform on-chip spectrometer,” Opt. Lett. 42, 1440-1443 (2017). https://www.osapublishing.org/ol/abstract.cfm?uri=ol-42-7-1440 
• Daero Lee, George Vukovich, Regina Lee., “Robust unscented Kalman filter for nanosat attitude estimation,” International Journal of Control, Automation and Systems October 2017, Volume 15, Issue 5, pp 2161–2173. https://link.springer.com/article/10.1007/s12555-016-0498-4 
• Young-Sook Lee, Young-Sil Kwak, Kyung-Chan Kim, Brian Solheim, Regina Lee, Jaejin Lee, “Observation of atomic oxygen O(^1S) green-line emission in the summer polar upper mesosphere associated with high-energy > 30 keV electron precipitation during high-speed solar wind streams," Journal of Geophysical Research - Space Physics., 20 January 2017. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JA023413 
• S. Guruprasad, S. Bisnath, R. Lee, J. Kozinski ,“Design and Implementation of a Low-cost SoC-based Software GNSS Receiver,” IEEE Transactions on Aerospace and Electronics Systems Magazine, Volume:31 Issue:4 April, 2016, pp 14 – 19. https://ieeexplore.ieee.org/abstract/document/7493945 

Conference Papers

• H. Podmore, R. Lee, “Compressive sensing on-chip Fourier-transform spectrometers,” Canadian American Mexican Graduate Student Conference, Washington, (2017) 
• P. Cheben, H. Podmore, A. Herrero, A.V. Velasco, J.H. Schmid,1 A. Scott, M. Vachon,1 R. Lee, M. L. Calvo, D.X. Xu, S. Janz and P. Corredera, “Recent advances in on-chip Fourier transform spectrometers,” Invited Paper: 19th International Conference on Transparent Optical Networks, 2-5 July 2017, Catalonia, Spain 
• Hugh Podmore, Al Scott, Pavel Cheben, Chris Sioris, Peter Cameron, Regina Lee, “The Design of a Microphotonic Spatial Heterodyne Spectrometer for Remote Sensing,” Photonics North, 2016 
• Hugh Podmore, Pavel Cheben, Al Scott, Regina Lee, “Principles and Design of a Planar Waveguide Fourier Transform Spectrometer for Remote-sensing Applications,” Progress In Electromagnetics Research Symposium (PIERS), 2016. 
• Mark Post, Ralf Bauer, Junquan Li, and Regina Lee, “Study for femto satellites using micro Control Moment Gyroscope,” 2016 IEEE Aerospace Conference, March 2016. 
• Lin, A., Lee, R, “Attitude Control for Small Spacecraft with Sensors Error,” the AIAA Space 2015, 31 August – 2 September, 2015, Pasadena, California. 
• Podmore, H. Lee, R, “Fabrication and Characterization of a Moth-Eye Antireflection Surface for Passively Increasing SmallSat Solar Power Production,” Small Satellite Conference, Logan, Utah, August 8 – 13 2015. 
• H. Podmore and R. Lee, "Increasing solar cell power production on micro and nano satellites using sub-wavelength gratings," 2015 IEEE Aerospace Conference, Big Sky, MT, 2015, pp. 1-7. doi: 10.1109/AERO.2015.7118884 
• Li, J., Post, M. A., Lee, R., "FPGA Hardware Nonlinear Control Design for Modular Small Satellite Attitude Control", 2015 IEEE Aerospace Conference, Big Sky, Montana March 7 - 14, 2015 

Posters

• T. Thai, S. Guruprasad, R. Lee, S. Bisnath, “FPGA-based GPS Receiver for Nanosatellite Applications,” Small Satellite Conference, Logan, Utah, August 8 – 13 2015. 

Journal Papers

• M. Post, J. Li, and R. Lee, "Design and construction of a magnetic field simulator for CubeSat attitude control testing.”  Journal of Instrumentation, Automation and Systems, May, 2014. https://www.semanticscholar.org/paper/Design-and-construction-of-a-magnetic-field-for-Post-Li/2b3895e12ef44f5f4bc2d4325a5a04c65ceb1daa 
• Li, J., Post, M. A., Lee, R., "Real Time Nonlinear Attitude Control System for Nanosatellite Applications", AIAA Journal of Guidance, Control, and Dynamics, Vol. 36, No. 6, November–December 2013, pp. 1661-1671. https://arc.aiaa.org/doi/abs/10.2514/1.59023 
• M. Post, J. Li, and R. Lee, "A Low Cost Photodiode Sun Sensor for CubeSat and Planetary Micro-rover", International Journal of Aerospace Engineering, vol. 2013, Article ID 549080, 9 pages, 2013.  
• Li, J., Post, M. A., Wright, T., Lee, R., "Design of Attitude Control Systems for CubeSat-class Nanosatellite", Journal of Control Science and Engineering, (Article ID 657182) May, 2013 https://www.hindawi.com/journals/jcse/2013/657182/ 

Conference Papers

• Li, J., Post, M. A., Lee, R., "A Novel Adaptive Unscented Kalman Filter Attitude Estimation and Control System for a 3U Nanosatellite", Europe Control Conference, July 2013, Zurich. 
• Li, J., Post, M. A., Lee, R., "Cubesat Attitude Control Systems with Magnetic Torquers and Flywheel", 23rd AAS/AIAA Spaceflight Mechanics Meeting, Feb 2013, Kauai, Hawaii. 
• Post, M. A., Li, J., Lee, R., "Nanosatellite Sun Sensor Attitude Determination using Low-Cost Hardware", 23rd AAS/AIAA Spaceflight Mechanics Meeting, Feb 2013, Kauai, Hawaii. 
• Post, M. A., Li, J., Lee, R, "Nanosatellite Air Bearing Tests of Fault-Tolerant Sliding-Mode Attitude Control with Unscented Kalman Filter", AIAA Guidance, Navigation, and Control Conference, Minneapolis, Aug. 13-16, 2012. 
• Mark A. Post, Brendan M. Quine, Regina Lee. “Bayesian Decision Making for Planetary Micro-Rovers,” AIAA Infotech@Aerospace 2012, Hyatt Regency Orange County, Garden Grove, California.19 - 21 Jun 2012. 
• Li, J., Post, M. A., Lee, Regina., "Real Time Fault Tolerant Nonlinear Attitude Control System for Nanosatellite Applications", AIAA Infotech@Aerospace 2012 Conference, Garden Grove, California, June. 19-21, 2012.