Dr Hugh G Lewis BSc, MSc, PhD

Senior Lecturer

Related links: Personal homepage

Dr Hugh G Lewis is Senior Lecturer within Engineering and the Environment at the University of Southampton.

I gained a Masters degree in Control Systems from the University of Sheffield in 1993 and a PhD in Remote Sensing from the University of Southampton in 1998. Afterwards, I worked as a research assistant on the EU Framework 4 project FLIERS (Fuzzy Land Information from Environmental Remote Sensing), based in Electronics and Computer Science, before commencing a three-year contract at the end of 1999 as a researcher on an EPSRC funded project on the long-term evolution of the space debris environment. This work led to a decade-long working relationship with Dr Graham Swinerd, the development of the DAMAGE space debris model, my work for the UK Space Agency, numerous publications and an inspiring (and also challenging) journey into the realm of space debris and Near Earth Objects. For the last six years I have represented the UK Space Agency (previously the British National Space Centre) in Working Group 2 of the Inter-Agency Space Debris Coordination Committee (IADC) and I now lead the Group's research on space debris modelling. In 2011 I was nominated as the United Kingdom's representative to the United Nations Committee on the Peaceful Uses of Outer Space (COPUOS) Scientific and Technical Subcommittee (STSC) Expert Group B (Space Debris, Space Operations and Tools to Support Collaborative Space Situational Awareness), supporting the activities of the UN COPUOS STSC Working Group on the Long-term Sustainability of Outer Space Activities.

Research

Publications

Teaching

Contact

Research interests

My research falls into three main areas:

Space Debris
The Astronautics Research Group has been involved in work on space debris modelling since 1992. I started in this area in 1999, working with Dr Graham Swinerd. We have developed a number of models, including DAMAGE, a state-of-the-art evolutionary model, and FADE. Our space debris research has been supported by research studentships funded by the EPSRC, the former Defence Evaluation and Research Agency (DERA), QinetiQ, the European Union Framework 7 Programme and internally here at the University. I also represent the UK Space Agency on the Inter-Agency Space Debris Coordination Committee (IADC), the intergovernmental forum for discussing space debris issues.

Find out more at https://www.southampton.ac.uk/~hglewis/spacedebris/index.html

Near Earth Objects
Due to their high relative speeds with respect to the Earth and large mass, NEOs can have extremely high kinetic energies, which on impact can be equivalent to the detonation of many nuclear weapons. Impact effects include atmospheric blast waves, thermal radiation, seismic shock and, for ocean impacts, tsunami. The impact of a NEO on the Earth represents a catastrophic, multi-hazard, natural disaster. Research efforts are targeting the technical roadblocks to the development of a science-based policy that addresses the NEO impact hazard. My focus has been on the development of risk assessment and decision-support tools. These include NEOSim, NEOImpactor and, more recently, NEOMiSS.

Remote Sensing
With the arrival of a new generation of Earth observation spacecraft with high spatial, spectral and temporal resolution, better technologies are required to process the large volume of data they provide. Research into these technologies is focusing on generalisable solutions that aim to reduce the errors and uncertainties in more traditional approaches. With Professor Peter Atkinson in Geography, we have developed an artificial neural network approach to resolve information at a finer spatial resolution than the sensor provides. This tool was built using a software framework for processing remotely sensed images, which I wrote whilst working on the EU Framework 4 project FLIERS. Other work addresses the need to understand changes arising from natural disasters or from pre-planned urban development, and reducing risk from natural hazards.

Other research areas
I also have interests in fractionated satellite concepts, cloud computing and human cognitive modelling using artificial neural networks. With Dr Sarah Stevenage in Psychology, we wrote the IACAPA person acquisition simulator, which is based on the Rochester Connectionist Simulator. I am currently working with Professor Simon Cox and Dr Kenji Takeda to develop a cloud computing solution for some of the operational aspects of space debris removal.

Research group

Astronautics

Research project(s)

ACCORD

Stardust

Fractionated satellites

A new way of implementing space systems.

CANOPUS: low cost access to space

CANOPUS is a proposed new concept of space launch operations designed to lift very light payloads over the Kármán line (the edge of space, at 100km above ground level) at a considerably lower cost than current systems, as well as offering the potential of near-immediate launch slot availability.

Technology for Improving Re-Entry Predictions of European Upper Stages through Dedicated Observations

Articles

Rumpf, C., Lewis, H., & Atkinson, P. (2017). Asteroid impact effects and their immediate hazards for human populations. Geophysical Research Letters. DOI: 10.1002/2017GL073191

Lidtke, A., Lewis, H., Armellin, R., & Urrutxua, H. (2017). Considering the collision probability of Active Debris Removal missions. Acta Astronautica, 131, 10-17. DOI: 10.1016/j.actaastro.2016.11.012

Rumpf, C., Lewis, H., & Atkinson, P. (2017). Population vulnerability models for asteroid impact risk assessment. Meteoritics and Planetary Science. DOI: 10.1111/maps.12861

Lidtke, A., Lewis, H., & Armellin, R. (2017). Statistical analysis of the inherent variability in the results of evolutionary debris models. Advances in Space Research, 1-35. DOI: 10.1016/j.asr.2017.01.004

Letizia, F., Colombo, C., Lewis, H., & Krag, H. (2016). Assessment of breakup severity on operational satellites. Advances in Space Research, 1-57.

Trisolini, M., Colombo, C., & Lewis, H. (2016). Demise and survivability criteria for spacecraft design optimization. The Journal of Space Safety Engineering, 3(2), 83–93. DOI: 10.1016/S2468-8967(16)30023-4

Rumpf, C., Lewis, H., & Atkinson, P. (2016). On the influence of impact effect modelling for global asteroid impact risk distribution. Acta Astronautica, 123, 165-170. DOI: 10.1016/j.actaastro.2016.03.015

Virgili, B., Lewis, H., Radtke, J., Krag, H., Revelin, B., Cazaux, C., ... Metz, M. (2016). Risk to space sustainability from large constellations of satellites. Acta Astronautica, 126, 154-162. DOI: 10.1016/j.actaastro.2016.03.034

Rumpf, C., Lewis, H. G., & Atkinson, P. M. (2016). The global impact distribution of Near-Earth objects. Icarus, 265, 209-217. DOI: 10.1016/j.icarus.2015.10.026

Budimir, M. E. A., Atkinson, P. M., & Lewis, H. (2015). A systematic review of landslide probability mapping using logistic regression. Landslides, 12(3), 419-436. DOI: 10.1007/s10346-014-0550-5

Rossi, A., Lewis, H., White, A., Anselmo, L., Pardini, C., Krag, H., & Bastida Virgili, B. (2015). Analysis of the consequences of fragmentations in low and geostationary orbits. Advances in Space Research, 1-12. DOI: 10.1016/j.asr.2015.05.035

Letizia, F., Colombo, C., & Lewis, H. G. (2015). Analytical model for the propagation of small debris objects clouds after fragmentations. Journal of Guidance Control and Dynamics, 38(8), 1478-1491. DOI: 10.2514/1.G000695

Letizia, F., Colombo, C., & Lewis, H. (2015). Collision probability due to space debris clouds through a continuum approach. Journal of Guidance Control and Dynamics, 39(10), 2240-2249. DOI: 10.2514/1.G001382

Lidtke, A. A., Lewis, H. G., & Armellin, R. (2015). Impact of high-risk conjunctions on Active Debris Removal target selection. Advances in Space Research, 56(8), 1752-1764. DOI: 10.1016/j.asr.2015.07.033

Letizia, F., Colombo, C., & Lewis, H. (2015). Multidimensional extension of the continuity equation method for debris clouds evolution. Advances in Space Research, 57(8), 1-17. DOI: 10.1016/j.asr.2015.11.035

Budimir, M. E. A., Atkinson, P. M., & Lewis, H. G. (2015). Seismically induced landslide hazard and exposure modelling in Southern California based on the 1994 Northridge, California earthquake event. Landslides, 12(5), 895-910. DOI: 10.1007/s10346-014-0531-8

White, A. E., & Lewis, H. (2014). An adaptive strategy for active debris removal. Advances in Space Research, 53(8), 1195-1206. DOI: 10.1016/j.asr.2014.01.021

Budimir, M. E. A., Atkinson, P. M., & Lewis, H. G. (2014). Earthquake-and-landslide events are associated with more fatalities than earthquakes alone. Natural Hazards, 72(2), 895-914. DOI: 10.1007/s11069-014-1044-4

Alessi, E., Rossi, A., Valsecchi, G. B., Anselmo, L., Pardini, C., Colombo, C., ... Merz, K. (2014). Effectiveness of GNSS disposal strategies. Acta Astronautica, 99, 292-302. DOI: 10.1016/j.actaastro.2014.03.009

White, A. E., & Lewis, H. G. (2014). The many futures of active debris removal. Acta Astronautica, 95, 189-197. DOI: 10.1016/j.actaastro.2013.11.009

Johnston, S., O'Brien, N., Lewis, H. G., Hart, E. E., White, A. E., & Cox, S. J. (2013). Clouds in space: scientific computing using Windows Azure. Journal of Cloud Computing, 2(2), 1-10. DOI: 10.1186/2192-113X-2-2

Schwarz, B. S., Tatnall, A. R. L., & Lewis, H. G. (2012). Coastal salinity measurement using a doppler radiometer. Advances in Space Research, 50(8), 1138-1149. DOI: 10.1016/j.asr.2012.01.020

Lewis, H., White, A. E., Crowther, R., & Stokes, H. (2012). Synergy of debris mitigation and removal. Acta Astronautica, 81(1), 62-68. DOI: 10.1016/j.actaastro.2012.06.012

Lewis, H. G., Saunders, A., Swinerd, G. G., & Newland, R. J. (2011). Effect of thermospheric contraction on remediation of the near-Earth space debris environment. Journal of Geophysical Research, 116(A2), A00H08-[10pp]. DOI: 10.1029/2011JA016482

Saunders, A., Lewis, H. G., & Swinerd, G. G. (2011). Further evidence of long-term thermospheric density change using a new method of satellite ballistic coefficient estimation. Journal of Geophysical Research, 116(A2), 1-15. DOI: 10.1029/2010JA016358

Stevenage, S. V., Hugill, A., & Lewis, H. G. (2011). Integrating voice recognition into models of person perception. Journal of Cognitive Psychology.

Minh, N., Atkinson, P. M., & Lewis, H. G. (2011). Super-resolution mapping using Hopfield neural network with panchromatic imagery. International Journal of Remote Sensing, 32(21), 6149-6176. DOI: 10.1080/01431161.2010.507797

Lewis, H. G., Swinerd, G., & Newland, R. J. (2011). The space debris environment: future evolution. Aeronautical Journal, 115(1166), 241-247. DOI: 10.1017/S0001924000005698

Lewis, H. G., Newland, R. J., Swinerd, G. G., & Saunders, A. (2010). A new analysis of debris mitigation and removal using networks. Acta Astronautica, 66, 257-268. DOI: 10.1016/j.actaastro.2009.05.010

Bailey, N. J., Swinerd, G. G., Lewis, H. G., & Crowther, R. (2010). Global vulnerability to near-Earth object impact. Risk Management, 12(1), 31-53. DOI: 10.1057/rm.2009.16

Lewis, H. G., Swinerd, G. G., Newland, R. J., & Saunders, A. (2009). The fast debris evolution model. Advances in Space Research, 44(5), 568-578. DOI: 10.1016/j.asr.2009.05.018

Dasmahapatra, S., Dupplaw, D., Hu, B., Lewis, P., Shadbolt, N., & Lewis, H. (2006). Facilitating multi-disciplinary, knowledge-based support for breast cancer screening. International Journal of Healthcare Technology and Management, 7(5), 403-420.

Nguyen, M. Q., Atkinson, P. M., & Lewis, H. G. (2006). Superresolution mapping using a hopfield neural network with fused images. IEEE Transactions on Geoscience and Remote Sensing, 44(3), 736-749. DOI: 10.1109/TGRS.2005.861752

Stevenage, S., & Lewis, H. (2005). By which name should I call thee? The consequences of having multiple names. Quarterly Journal Of Experimental Psychology Section A - Human Experimental Psychology, 58(8), 1447-1461. DOI: 10.1080/02724980443000692

Nguyen, M. Q., Atkinson, P. M., & Lewis, H. G. (2005). Superresolution mapping using a Hopfield neural network with lidar data. IEEE Geoscience and Remote Sensing Letters, 2(3), 366-370. DOI: 10.1109/LGRS.2005.851551

Williams, D. N., Swinerd, G. G., Lewis, H. G., & Gittins, G. (2004). A new fast cloud propagator for use in the GEO regime. Advances in Space Research, 34(5), 1181-1187. DOI: 10.1016/j.asr.2003.02.033

Gittins, G. L., Swinerd, G. G., Lewis, H. G., & Williams, D. N. (2004). A study of debris impact collision probabilities to space tethers. Advances in Space Research, 34(5), 1080-1084. DOI: 10.1016/j.asr.2003.01.013

Swinerd, G., Lewis, H., Williams, N., & Martin, C. (2004). Self-induced collision hazard in high and moderate inclination satellite constellations. Acta Astronautica, 54(3), 191-201. DOI: 10.1016/S0094-5765(02)00290-4

Lewis, H. G., Swinerd, G. G., Martin, C. E., & Campbell, W. S. (2004). The stability of disposal orbits at super-synchronous altitudes. Acta Astronautica, 55(3-9), 299-310. DOI: 10.1016/j.actaastro.2004.05.022

Tatem, A. J., Lewis, H. G., Atkinson, P. M., & Nixon, M. S. (2003). Increasing the spatial resolution of agricultural land cover maps using a Hopfield neural network. International Journal of Geographical Information Science, 17(7), 647-672. DOI: 10.1080/1365881031000135519

Tatem, A. J., Lewis, H. G., Atkinson, P. M., & Nixon, M. S. (2002). Super-resolution land cover pattern prediction using a Hopfield neural network. Remote Sensing of Environment, 79(1), 1-14. DOI: 10.1016/S0034-4257(01)00229-2

Stevenage, S. V., & Lewis, H. G. (2002). Understanding person acquisition using an interactive activation and competition network. Visual Cognition, 9(7), 839-867. DOI: 10.1080/13506280143000287

Lewis, H. G., & Brown, M. (2001). A generalized confusion matrix for assessing area estimates from remote sensing imagery. International Journal of Remote Sensing, 22(16), 3223-3235. DOI: 10.1080/01431160152558332

Tatem, A. J., Lewis, H. G., Atkinson, P. M., & Nixon, M. S. (2001). Multiple-class land-cover mapping at the sub-pixel scale using a Hopfield neural network. International Journal of Applied Earth Observation and Geoinformation, 3(2), 184-190. DOI: 10.1016/S0303-2434(01)85010-8

Tatem, A. J., Lewis, H. G., Atkinson, P. M., & Nixon, M. S. (2001). Super-resolution target identification from remotely sensed images using a Hopfield neural network. IEEE Transactions on Geoscience and Remote Sensing, 39(4), 781-96. DOI: 10.1109/36.917895

Brown, M., Lewis, H. G., & Gunn, S. R. (1999). Linear Spectral Mixture Models and Support Vector Machines for Remote Sensing. IEEE Trans. Geoscience and Remote Sensing, 38(5), 2346--2360.

Brown, M., Gunn, S. R., & Lewis, H. G. (1999). Support vector machines for optimal classification and spectral unmixing. Ecological Modelling, 120(2-3), 167-179. DOI: 10.1016/S0304-3800(99)00100-3

Brown, M., Lewis, H. G., & Gunn, S. R. (1999). Support Vector Machines for Optimal Classification and Spectral Unmixing. Ecological Modelling, 120, 167--179.

Lewis, H. G., Cote, S., & Tatnall, A. R. L. (1997). Determination of spatial and temporal characteristics as an aid to neural network cloud classification. International Journal of Remote Sensing, 18(4), 899-915. DOI: 10.1080/014311697218827

Atkinson, P., Cutler, M., & Lewis, H. G. (1997). Mapping sub-pixel variation in land cover in the UK from AVHRR imagery. International Journal of Remote Sensing, 18(4), 917-935. DOI: 10.1080/014311697218836

Journal Special Issue

Lewis, H., Radtke, J., Rossi, A., Beck, J., Oswald, M., Anderson, P., ... Krag, H. (2017). Sensitivity of the space debris environment to large constellations and small satellites. Journal of the British Interplanetary Society, 70, 105-117. [2017.70.105].

Book Chapters

Lewis, H. G., Swinerd, G. G., & Channer, S. E. (2004). Collision risk analysis for spaceborne interferometric SAR systems. In J. Bendisch (Ed.), Space Debris and Space Traffic Management 2004. (pp. 371-384). (Science and Technology Series; No. 110). American Astronautical Society.

Lewis, H. G., & Swinerd, G. G. (2003). Comparison of methods for predicting collision risk. In J. Bendisch (Ed.), Space debris and space traffic management 2003. (pp. 207-226). (Science and Technology Series; No. 109). California, USA: American Astronautical Society.

Lewis, H. G., Swinerd, G. G., Martin, C. E., & Campbell, W. S. (2003). The stability of disposal orbits at super-synchronous altitudes. In J. Bendisch (Ed.), Space Debris and Space Traffic Management 2003. (pp. 1-9). (Science and Technology Series; No. 109). United States, US: American Astronutical Society.

Tatem, A. J., Lewis, H. G., Atkinson, P. M., & Nixon, M. S. (2002). Super-resolution land cover mapping from remotely-sensed imagery using a Hopfield neural network. In G. M. Foody, & P. M. Atkinson (Eds.), Uncertainty in Remote Sensing and GIS. (pp. 77-98). Chichester, UK: John Wiley & Sons.

Tatem, A. J., Lewis, H. G., Atkinson, P. M., & Nixon, M. S. (2001). Super-resolution mapping of multiple-scale land cover features using a Hopfield neural network. In Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International. (pp. 3200-3202). Sydney, Australia: IEEE. DOI: 10.1109/IGARSS.2001.978302

Lewis, H. G., Newland, F. T., Côté, S., & Tatnall, A. R. L. (1999). Cloud motion analysis. In P. M. Atkinson, & N. J. Tate (Eds.), Advances in Remote Sensing and GIS Analysis. (pp. 39-59). Chichester, UK: Wiley.

Conferences

Rossi, A., Alessi, E. M., Valsecchi, G. B., Lewis, H., Radtke, J., Bombardelli, C., & Bastida Virgili, B. (2017). A quantitative evaluation of the environmental impact of the mega constellations. In T. Flohrer, & F. Schmitz (Eds.), Proceedings of the 7th European Conference on Space Debris. (1 ed., Vol. 7). The European Space Agency (ESA).

Principe, G., Armellin, R., Di Lizia, P., & Lewis, H. (2017). Automatic domain pruning filter for optical observations on short arcs. In T. Flohrer, & F. Schmitz (Eds.), Proceedings of the 7th European Conference on Space Debris. (1 ed., Vol. 7). The European Space Agency (ESA).

Trisolini, M., Colombo, C., & Lewis, H. (2017). Demise and survivability criteria for spacecraft design optimisation. In Proceedings of the 8th International Association for Advancement of Space Safety Conference.

Letizia, F., Colombo, C., Lewis, H., & Krag, H. (2017). Development of a debris index. In Stardust Final Conference - Advances in Asteroids and Space Debris Engineering and Science. Springer.

Letizia, F., Colombo, C., Lewis, H., & Krag, H. (2017). Extending the ECOB space debris index with fragmentation risk estimation. Paper presented at 7th Space Debris Conference, Darmstadt, Germany.

Colombo, C., Letizia, F., Trisolini, M., Lewis, H. G., Chanoine, A., Duvernois, P-A., ... Lemmens, S. (2017). Life cycle assessment indicator for space debris. Paper presented at 7th Space Debris Conference, Darmstadt, Germany.

Rossi, A., Alessi, E. M., Valsecchi, G. B., Lewis, H. G., Colombo, C., Anselmo, L., ... Merz, K. (2017). MEO dynamics and GNSS disposal strategies. In T. Flohrer, & F. Schmitz (Eds.), Proceedings of the 7th European Conference on Space Debris. (1 ed., Vol. 7). The European Space Agency (ESA).

Lewis, H., Bastida Virgili, B., Radtke, J., Rossi, A., Beck, J., & Krag, H. (2017). Mitigation measures for large constellations. In 68th International Astronautical Congress: Adelaide, Australia, 25-29 September 2017. International Astronautical Federation.

Trisolini, M., Colombo, C., & Lewis, H. (2017). Multi-objective optimisation for spacecraft design for demise and survivability. In Stardust Final Conference.

Trisolini, M., Colombo, C., & Lewis, H. (2017). On the demisability and survivability of modern spacecraft. In 8th European Conference on Space Debris.

Lewis, H., Radtke, J., Beck, J., Bastida Virgili, B., & Krag, H. (2017). Self-induced collision risk analysis for large constellations. In Proceedings of the 7th European Conference on Space Debris. (1 ed., Vol. 7). European Space Agency.

Gondelach, D. J., Armellin, R., Lewis, H., San-Juan, J. F., & Wittig, A. (2017). Semi-analytical propagation with drag computation and flow expansion using differential algebra. Paper presented at 27th AAS/AIAA Space Flight Mechanics Meeting, San Antonio, United States.

Radtke, J., Stoll, E., Lewis, H., & Bastida Virgili, B. (2017). The impact of the increase in small satellite launch traffic on the long-term evolution of the space debris environment. In T. Flohrer, & F. Schmitz (Eds.), Proceedings of the 7th European Conference on Space Debris. (1 ed., Vol. 7). The European Space Agency (ESA).

Somma, G. L., Lewis, H., & Colombo, C. (2016). Adaptive remediation of the space debris environment using feedback control. Paper presented at 67th International Astronautical Congress (IAC), Mexico.

Principe, G., Armellin, R., & Lewis, H. (2016). Confidence region of least squares solution for single-arc observations. Paper presented at Advanced Maui Optical and Space Surveillance Technologies Conference, United States.

Rumpf, C., Lewis, H., & Atkinson, P. (2016). Global impact risk of known asteroids. Paper presented at IEEE Aerospace Conference, United States.

Lidtke, A. A., Gondelach, D. J., Armellin, R., Colombo, C., Lewis, H. G., Funke, Q., & Flohrer, T. (2016). Processing two line element sets to facilitate re-entry prediction of spent rocket bodies from geostationary transfer orbit. Paper presented at International Conference on Astrodynamics Tools and Techniques, Germany.

Trisolini, M., Lewis, H., & Colombo, C. (2016). Spacecraft design optimisation for demise and survivability. In 67th International Astronautical Congress (IAC 2016): Making space accessible and affordable to all countries. (Vol. 3). International Astronautical Federation.

Rossi, A., Alessi, E., Valsecchi, G. B., Lewis, H., Colombo, C., Anselmo, L., ... Merz, K. (2016). The effect of the GNSS disposal strategies on the long term evolution of the MEO region.

Letizia, F., Colombo, C., & Lewis, H. G. (2015). 2D continuity equation method for space debris cloud collision analysis. 25th AAS/AIAA Space Flight Mechanics Meeting, United States.

Letizia, F., Colombo, C., & Lewis, H. (2015). Density based approach for collision risk computation. Paper presented at 25th International Symposium on Space Flight Dynamics, Germany.

Lidtke, A. A., Rumpf, C., Tatnall, A., Lewis, H. G., Walker, S. J., Taylor, M., ... Bantock, J. R. B. (2015). Enhancing spaceflight safety with UOS3 cubesat. Paper presented at 1st Symposium on Space Educational Activities, Italy.

Rumpf, C., Lewis, H. G., & Atkinson, P. M. (2015). Global impact distribution of asteroids and affected population. 2015 IAA Planetary Defense Conference, Italy.

Rumpf, C., Lewis, H. G., & Atkinson, P. M. (2015). Monitoring the global asteroid impact risk. Paper presented at International Astronautical Congress, Israel.

Trisolini, M., Colombo, C., & Lewis, H. (2015). Survivability and demise criteria for sustainable spacecraft design. In 66th International Astronautical Congress 2015 (IAC 2015): Space - The Gateway for Mankind's Future. (Vol. 4, pp. 2505-2523). International Astronautical Federation.

Lidtke, A., Lewis, H. G., & Armellin, R. (2014). A deterministic approach to active debris removal target selection. Paper presented at Advanced Maui Optical and Space Surveillance Technologies Conference, .

Lewis, H. G., Schwarz, B., George, S., & Stokes, H. (2014). An assessment of CubeSat collision risk. Paper presented at 65th International Astronautical Congress, .

Letizia, F., Colombo, C., & Lewis, H. G. (2014). Analytical model for the propagation of small debris objects after a fragmentation event. Paper presented at 24th AAS/AIAA Space Flight Mechanics Meeting, United States.

Lidtke, A., & Lewis, H. (2014). Collision probability assessment for active debris removal missions. Poster session presented at 65th International Astronautical Congress (IAC2014), Canada.

Letizia, F., Colombo, C., & Lewis, H. (2014). Continuity equation approach for the analysis of the collision risk due to space debris clouds generated by a fragmentation event. Paper presented at 65th International Astronautical Congress, Canada.

Letizia, F., Colombo, C., & Lewis, H. G. (2014). Small debris fragments contribution to collision probability for spacecraft in Low Earth Orbits. 7th IAASS Conference, Germany.

Letizia, F., Colombo, C., & Lewis, H. G. (2013). Space debris cloud evolution in Low Earth Orbit. Paper presented at 64th International Astronautical Congress, China.

Norlund, C. C. F., Lewis, H. G., Atkinson, P. M., & Guo, J. Y. (2011). NEOMiSS: A near-Earth object decision support tool. Paper presented at IAA Planetary Defense Conference, Romania.

Schwarz, B., Tatnall, A. R. L., & Lewis, H. G. (2010). A fractionated approach to coastal salinity measurement. Paper presented at 61st International Astronautical Congress, Czech Republic.

Saunders, A., Lewis, H. G., & Swinerd, G. G. (2009). A new tool for satellite re-entry predictions. Poster session presented at Fifth European Conference on Space Debris, .

Lewis, H. G., Swinerd, G. G., Newland, R. J., & Saunders, A. (2009). Active removal study for on-orbit debris using DAMAGE. Paper presented at Fifth European Conference on Space Debris, .

Johnston, S., Takeda, K., Lewis, H. G., Cox, S. J., & Swinerd, G. G. (2009). Cloud computing for planetary defense. 1-2. Paper presented at Microsoft eScience Workshop, .

Norlund, C. C. F., Lewis, H. G., & Atkinson, P. M. (2009). Evacuation simulation modelling in the event of a near Earth object impact. Paper presented at First International Conference on Evacuation Modeling and Management, .

Bailey, N. J., Swinerd, G. G., Lewis, H. G., & Crowther, R. (2009). NEOImpactor - a tool for assessing Earth's vulnerability to the NEO impact hazard. Paper presented at 1st IAA Planetary Defense Conference: Protecting Earth from Asteroids, .

Saunders, A., Swinerd, G. G., & Lewis, H. G. (2009). Preliminary results to support evidence of thermospheric contraction. Paper presented at Advanced Maui Optical and Space Surveillance Technologies Conference, .

Newland, R. J., Lewis, H. G., & Swinerd, G. G. (2009). Space debris networks. Poster session presented at European Conference on Complex Systems, .

Newland, R. J., Lewis, H. G., & Swinerd, G. G. (2009). Supporting the development of active debris removal using weighted networks. Poster session presented at Fifth European Conference on Space Debris, .

Lewis, H. G., Swinerd, G. G., & Newland, R. J. (2009). The space debris environment: future evolution. Paper presented at CEAS 2009 European Air and Space Conference, United Kingdom.

Lewis, H. G., Newland, R. J., Swinerd, G. G., & Saunders, A. (2008). A new analysis of debris mitigation and removal using networks. Paper presented at 59th International Astronautical Congress, .

Lewis, H. G., Swinerd, G. G., Newland, R. J., & Saunders, A. (2008). The fast debris evolution model. Paper presented at 37th COSPAR Scientific Assembly, .

Bailey, N. J., Bevington, J. S., Lewis, H. G., Swinerd, G. G., Atkinson, P. M., Crowther, R., & Holland, D. (2007). From Buncefield to Tunguska: hazard and disaster modelling at the University of Southampton. Paper presented at 5th International Workshop on Remote Sensing Applications to Natural Hazards, .

Bevington, J. S., Lewis, H. G., & Atkinson, P. M. (2006). Quantifying gradual and sudden change using remotely sensed imagery. Paper presented at Remote Sensing and Photogrammetry Society (RSPSoc) Annual Conference, .

Saunders, C. J., Martin, C. E., & Lewis, H. G. (2005). Disposal orbit characteristics for Galileo including orbit propagation techniques. In Proceedings of the 4th European Conference Space Debris. (pp. 685-688). (European Space Agency Special Publication; No. ESA SP-587). European Space Agency.

Lewis, H. G., Swinerd, G. G., Ellis, C. S., & Martin, C. E. (2005). Response of the space debris environment to greenhouse cooling. Fourth European Conference on Space Debris, .

Shadbolt, N., Lewis, P., Dasmahapatra, S., Dupplaw, D., Hu, B., & Lewis, H. (2004). MIAKT: Combining Grid and Web Services for Collaborative Medical Decision Making. AHM2004 UK eScience All Hands Meeting, United Kingdom.

Dasmahapatra, S., Dupplaw, D., Hu, B., Lewis, H., Lewis, P., Poissonnier, M., & Shadbolt, N. (2004). Ontology-based Decision Support for Multi- Disciplinary Management of Breast Cancer.. Paper presented at INTERNATIONAL WORKSHOP ON DIGITAL MAMMOGRAPHY 2004, United States.

Williams, D. N., Swinerd, G. G., Lewis, H. G., & Gittins, G. L. (2002). A new fast cloud propagator for use in the GEO regime. Paper presented at IAF COSPAR 2002: 34th Committee on Space Research Scientific Assembly: 2nd World Space Congress, United States.

Lewis, H. G., Swinerd, G., Williams, N., & Gittins, G. (2002). Investigating the long-term evolution of the debris environment in high Earth orbit using the DAMAGE model. In Space Debris 2001. (pp. 167-180). (Science and Technology Series; Vol. 105, No. 105). American Astronautical Society.

Lewis, H. G., Swinerd, G. G., Williams, N., & Gittins, G. (2001). DAMAGE: a dedicated GEO debris model framework. In Proceedings of the Third European Conference on Space Debris. (pp. 373-378). (European Space Agency Special Publication; No. 473). Noordwijk, Netherlands: The European Space Agency (ESA).

Lewis, H. G., Swinerd, G. G., Williams, N., & Gittins, G. (2001). Investigating the long-term evolution of the debris environment in high Earth orbit using the DAMAGE model. Paper presented at 52nd International Astronautical Congress, .

Martin, C., Lewis, H. G., & Walker, R. (2001). Studying the MEO and GEO space debris environments with the integrated debris evolution suite (IDES) model. In Proceedings of the Third European Conference on Space Debris. (pp. 351-354). (European Space Agency Special Publication; No. 473). Noordwijk, Netherlands: The European Space Agency (ESA).

Tatem, A. J., Lewis, H. G., Atkinson, P. M., & Nixon, M. S. (2001). Super-resolution mapping of urban scenes from IKONOS imagery using a Hopfield neural network. In IGARSS 2001 Scanning the Present and Resolving the Future. (pp. 3203-3205). Sydney, Australia: Institute of Electrical and Electronics Engineers. DOI: 10.1109/IGARSS.2001.978303

Lewis, H. G., Swinerd, G. G., & Williams, D. N. (2000). Artificial neural network analysis of space debris. 1-9. Paper presented at 51st International Astronautical Congress, .

Tatem, A. J., Lewis, H. G., Atkinson, P. M., & Nixon, M. S. (2000). Land cover mapping at the sub-pixel scale using a Hopfield neural network. In Proceedings of the 28th International Symposium on Remote Sensing of the Environment. (pp. 47-50). Tuscon, USA: International Symposium on Remote Sensing of the Environment.

Swinerd, G. G., Lewis, H. G., & Williams, N. (2000). Self-induced collision hazard in high and moderate inclination satellite constellations. In Proceedings of the 51st International Astronautical Federation (IAF) Congress. Reston, USA: American Institute of Aeronautics and Astronautics.

Lewis, H. G., Nixon, M. S., & Tatnall, A. R. L. (1999). Appropriate strategies for mapping land cover from satellite imagery. 717-724. Proceedings of the 25th Conference of the Remote Sensing Society, .

Lewis, H. G., Nixon, M. S., Tatnall, A. R. L., & Brown, M. (1999). Appropriate strategies for mapping land cover from satellite imagery. 717-724. Paper presented at Proceedings of the 25th Conference of the Remote Sensing Society, .

Lewis, H. G., & Nixon, M. S. (1999). Empirical models for estimating land cover areas from remotely sensed imagery. In Proceedings of the Geoscience and Remote Sensing Symposium, 1999 (IGARSS '99). Piscataway, USA: Institute of Electrical and Electronics Engineers. DOI: 10.1109/IGARSS.1999.771557

Lewis, H. G., & Nixon, M. S. (1999). Empirical Models for Estimating Land Cover Areas from Remotely-Sensed Imagery. 2504 - 2506. Proc. IEEE Geoscience and Remote Sensing Symposium, .

Brown, M., Lewis, H. G., & Gunn, S. R. (1999). Estimation of sub-pixel land cover using support vector methods. Paper presented at 25th Annual Conference and Exhibition of the Remote Sensing Society (RSS '99): From Data to Information, .

Stevenage, S. V., & Lewis, H. G. (1999). IACAPA: modelling recognition and learning of people with an interactive activation and competition model. In Proceedings of the 9th International Conference on Artificial Neural Networks (ICANN '99). (pp. 779-784). Stevengae, UK: Institution Of Engineering And Technology. DOI: 10.1049/cp:19991206

Lewis, H. G., Nixon, M. S., & Brown, M. (1999). On appropriate modelling strategies for estimating land cover areas from satellite imagery. 443-448. Proceedings of the Ninth International Conference on Artificial Neural Networks, .

Lewis, H. G., Nixon, M. S., & Brown, M. (1999). On appropriate modelling strategies for estimating land cover areas from satellite imagery. In Proceedings of the 9th International Conference on Artificial Neural Networks (ICANN '99). (pp. 443-448). Piscataway, USA: Institute of Electrical and Electronics Engineers. DOI: 10.1049/cp:19991149

Lewis, H. G., Nixon, M. S., Tatnall, A. R. L., Edwards, M., & Hughes, M. (1999). On the role of uncertainty in empirical mixture modelling. Paper presented at Proceedings of The 25th Conference of the Remote Sensing Society, .

Lewis, H. G., Hughes, M., Edwards, M., Tatnall, A., & Nixon, M. S. (1999). On the role of uncertainty in emprical mixture modelling. 709-716. Proceedings of the 25th Conference of the Remote Sensing Society, .

Brown, M., Lewis, H. G., & Gunn, S. R. (1999). Support vector machines for spectral unmixing. In Proceedings of the IEEE 1999 International Symposium on Geoscience and Remote Sensing Symposium (IGARSS '99). (pp. 1363-1365). Piscataway, USA: Institute of Electrical and Electronics Engineers. DOI: 10.1109/IGARSS.1999.774631

Brown, M., & Lewis, H. G. (1998). Support vector machines and linear spectral unmixing for remote sensing. In S. Singh (Ed.), International Conference on Advances in Pattern Recognition: Proceedings of ICAPR 98. (pp. 395-404). London: Springer.

Lewis, H. G., Cote, S., & Tatnall, A. R. L. (1995). A neural network approach to cloud classification from multi-temporal satellite imagery. In Fourth International Conference on Artificial Neural Networks. (pp. 116-121). Piscataway, USA: Institute of Electrical and Electronics Engineers.

Atkinson, P. M., Cutler, M., & Lewis, H. G. (1995). Mapping sub-pixel variation in land cover in the UK from AVHRR imagery. In Proceedings of the 21st Conference of the Remote Sensing Society. (pp. 58-65). Nottingham, UK: Remote Sensing and Photogrammetry Society.

Lewis, H. G., Cote, S., & Tatnall, A. R. L. (1995). Shape, motion and contextual descriptors for a neural network cloud classifier. In Proceedings of the 21st Conference of the Remote Sensing Society. (pp. 3-10). Nottingham, Uk: Remote Sensing and Photogrammetry Society.

Lewis, H. G., Atkinson, P. M., & Woodcock, C. E. (1970). Exploring a new method for retaining maximum information content in MODIS imagery. Paper presented at Remote Sensing and Photogrammetry Society (RSPSoc) Annual Conference, .

Nguyen, M. Q., Atkinson, P. M., & Lewis, H. G. (1970). Multispectral image super-resolution using the Hopfield neural network with forward model and semivariogram matching. Paper presented at Remote Sensing and Photogrammetry Society (RSPSoc) Annual Conference, .

Bailey, N. J., Swinerd, G. G., Morley, A. D., & Lewis, H. G. (1970). Near Earth object impact simulation tool for supporting the NEO mitigation decision making process. Paper presented at Near Earth Objects, Our Celestial Neighbors: Opportunity and Risk, IAU Symposium No. 236, .

Bevington, J. S., Lewis, H. G., & Atkinson, P. M. (1970). Quantitative and qualitative measurements of planned and unexpected change using remotely sensed imagery. Paper presented at 4th International Workshop on Remote Sensing for Disaster Response, .

Reports

Lewis, H. G. (2001). Modifications to SDS source code for medium-term risk analysis for satellite constellations. (Aeronautics and Astronautics Technical Report; No. AA-HGL-08022001). Southampton, UK: School of Engineering Sciences, University of Southampton.

Lewis, H. G., Brown, M., Tatnall, A. R. L., Nixon, M. S., & Manslow, J. F. (1998). Data analysis and empirical classification in FLIERS. (ISIS Technical Report). Southampton, UK: Department of Electronics and Computer Science, University of Southampton.

Lewis, H. G., & Brown, M. (1998). FLIERS software framework and toolkit version 2.0: user guides. (ISIS Technical Report). Southampton, UK: Department of Electronics and Computer Science, University of Southampton.

Lewis, H. G., & Brown, M. (1997). FLIERS project: classification software framework. (ISIS Technical Report). Southampton, UK: Department of Electronics and Computer Science, University of Southampton.

Thesis

Lewis, H. G. (2005). PCAP module 2 in-depth study report: reflections on peer-assessment in astronautics group work

Module title	Module code	Discipline	Role
Concurrent Design for Space Applications	SESA3024	Aerospace Engineering	Course leader
TT Pt I Induction Programme	SESG1010	Engineering Sciences	Course leader
Astronautics	SESA3005	Aerospace Engineering	Tutor
Computing	SESA2006	Aerospace Engineering	Tutor
Spacecraft Systems and Design	SESA3010	Aerospace Engineering	Tutor

Dr Hugh G Lewis
Engineering and the Environment University of Southampton Highfield Southampton SO17 1BJ

Room Number:13/5013

Dr Hugh G Lewis's personal home page

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