Refereed Journal Articles


Sugar G., M. M. Oppenheim, Y. S. Dimant, and S. Close (2018),  Formation of plasma around a small meteoroid: Simulation and theory.  Journal of Geophysical Research: Space Physics, doi:10.1002/2018JA025265.


Lee, N. and Close, S. (2017), Meteoroid Impact Detection for Exploration of Asteroids: small satellites for asteroid characterization, Journal of Spacecraft and Rockets, doi:10.2514/1.A33928.

Sugar, G., Moorhead A., Brown P., and Cooke W., Meteor shower detection with density‐based clustering, Meteoritics & Planetary Science, doi:

Fletcher, A. and Close, S., Particle-in-cell simulations of an RF emission mechanism associated with hypervelocity impact plasmas, Physics of Plasmas, 24, 053102, doi:10.1063/1.4980833

Goel, A., Krishnamoorthy, S., Swenson, T., West, S., Li, A., Crew, A., Philips, D. J., Screve, A., and Close, S., Design for CubeSat-based dust and radiation studies at Europa, Acta Astronautica, 136, 204--218, doi:10.1016/j.actaastro.2017.03.016

Krishnamoorthy, S. and Close, S., Investigation of plasma-surface interaction effects on pulsed electrostatic manipulation for reentry blackout alleviation, J. Phys. D: App. Phys., 50(10), 105202, doi: 10.1088/1361-6463/aa5901


Nuttall, A., Kochenderfer, M. and Close, S. (2016), Detection of hypervelocity impact radio frequency pulses through prior constrained source separation, Radio Science, 51(10), 1660–1675, doi:10.1002/2016RS006108.

Li, A. and Close, S., Neutral density estimation derived from meteoroid measurements using high-power, large-aperture radar, J. Geophys. Res., 121(13), 8023–8037, doi:10.1002/2015JD024547.


Fletcher, A., S. Close, and D. Mathias (2015), Simulating plasma production from hypervelocity impacts, Physics of Plasmas, 22, 093504, 1–11, doi:10.1063/1.4930281.

Li, A. and S. Close (2015), Mean thermospheric density estimation derived from satellite constellations, Adv. Space Res. 56(8), 1645–1657, doi:1016/j.asr.2015.07.022.

Marshall, R. A. and S. Close (2015), An FDTD model of scattering from meteor head plasma, J. Geophys. Res., 120(7), 5931–5942, doi:10.1002/2015JA021238.

Goel, A., Lee, N., Close, S. (2015), Estimation of hypervelocity impact parameters from measurements of optical flash. Int. J. Impact Eng., 84, 54-63, doi:10.1016/j.ijimpeng.2015.05.008.

Goel, A., Tarantino, P. M., Lauben, D. S., Close, S. (2015), Design and testing of miniaturized plasma sensor for measuring hypervelocity impact plasmas, Rev. Sci. Instrum., 86(4), doi:10.1063/1.4917276.


[PDF] Frost, C. et al., Small Spacecraft Technology State of the Art. NASA/TP–2014–216648/REV1. July 2014.

[PDF] Marshall, R. A. (2014), Effect of self-absorption on attenuation of lightning and transmitter signals in the lower ionosphere, J. Geophys. Res. Space Physics, 119, doi:10.1002/2014JA019921.

[PDF] Marshall, R. A., T. Adachi, R.-R. Hsu, and A. B. Chen (2014), Rare examples of early VLF events observed in association with ISUAL-detected Gigantic Jets, Radio Sci., 49, 36–43, doi:10.1002/2013RS005288.

[PDF] Marshall, R. A., and J. B. Snively (2014), Very low frequency subionospheric remote sensing of thunderstorm-driven acoustic waves in the lower ionosphere, J. Geophys. Res. Atmos., 119, doi:10.1002/2014JD021594.


[PDF] Yee, J. and Close, S., Plasma turbulence of nonspecular trail plasmas as measured by a high-power large-aperture radar, J. Geophys. Res., vol. 118, 24, 13, 449-462, 2013, doi:10.1002/2013JD020247.

[PDF] Close, S., I. Linscott, N. Lee, T. Johnson, D. Strauss, A. Goel, D. Lauben, R. Srama, A. Mocker, and S. Bugiel, Detection of electromagnetic pulses produced by hypervelocity micro particle impact plasmas, Physics of Plasmas, vol. 20, 092102, 1-8, 2013, doi:10.1063/1.4819777.

[PDF] Lee, N. and S. Close, Curved pleat folding for smooth wrapping, Proceedings of the Royal Society A, vol. 469, 20130152, 2013, doi:10.1098/rspa.2013.0152.

[PDF] Lee, N., S. Close, A. Goel, D. Lauben, I. Linscott, T. Johnson, D. Strauss, S. Bugiel, A. Mocker, and R. Srama, Theory and experiments characterizing hypervelocity impact plasmas on biased spacecraft materials, Physics of Plasmas, 20, 032901, 2013, doi:10.1063/1.4794331.

Pifko, S., D. Janches, S. Close, J. J. Sparks, T. Nakamura, and D. Nesvorny, Modeling the meteoroid input function at mid-latitude using meteor observations by the MU radar, Icarus, 2013.


[PDF] Volz, R. and S. Close, Inverse filtering of radar signals using compressed sensing with application to meteors, Radio Sci., 47, RS0N05, 2012, doi:10.1029/2011RS004889.

[PDF] Close, S., R. Volz, R. Loveland, A. Macdonell, P. Colestock, I. Linscott, M. Oppenheim, Determining meteoroid bulk densities using a plasma scattering model with high-power large-aperture radar data, Icarus, 221(1), 300-309, 2012, doi:10.1016/j.icarus.2012.07.033.

Seo, J., J. Lee, S. Pullen, P. Enge, and S. Close, Targeted Parameter Inflation within Ground-Based Augmentation Systems to Minimize Anomalous Ionospheric Impact, Journal of Aircraft, 2012.

[PDF] Kelley, M., S. Pancoast, S. Close, Z. Wang, Analysis of electromagnetic and electrostatic effects of particle impacts on spacecraft, Adv. Space. Res., 2012.

[PDF] Lee, N., S. Close, D. Lauben, I. Linscott, A. Goel, T. Johnson, J. Yee, A. Fletcher, R. Srama, S. Bugiel, A. Mocker, P. Colestock, and S. Green, Measurements of freely-expanding plasma from hypervelocity impacts, Int. J. Impact Eng., 44, 40-49, 2012.


[PDF] Vertatschitsch, L. E., J. D. Sahr, P. Colestock, and S. Close, Meteoroid head echo polarization features studied by numerical electromagnetics modeling, Radio Sci., 46, RS6016, 2011.

[PDF] Close, S., A. Fletcher, M. Dunham, and I. Linscott, Coherent Matched Filter Signal Processing Algorithms for Probing the Ionosphere Using Broadband RF Data, JGR, 116, 2011.

[PDF] Dymond, K. F., C. Watts, C. Coker, S. A. Budzien, P. A. Bernhardt, N. Kassim, T. J. Lazio, K. Weiler, P. C. Crane, P. S. Ray, A. Cohen, T. Clarke, L. J. Rickard, G. B. Taylor, F. Schinzel, Y. Pihlstrom, M. Kuniyoshi, S. Close, P. Colestock, S. Meyers, and A. Datta, A medium-scale traveling ionospheric disturbance observed from the ground and from space, Radio Sci., 46, RS5010, 2011.

[PDF] Loveland, R., A. Macdonell, S. Close, M. Oppenheim, and P. Colestock, Comparison of methods of determining meteoroid range rates from linear frequency modulated chirp pulses, Radio Sci., 46, 2011.

[PDF] Zinn, J., S. Close, P. L. Colestock, A. Macdonell, and R. Loveland, Analysis of ALTAIR 1998 meteor radar data, JGR, 116, 2011.

[PDF] Close, S., M. Kelley, L. Vertatschitsch, M. Oppenheim, and J. Yee, Polarization and scattering of a long-duration meteor trail, JGR, 116, 2011.

[PDF] Lay, E., S. Close, P. Colestock, G. Bust, Development and error analysis of Nonlinear Ionospheric Removal Algorithm for ionospheric electron density determination using broadband RF data, JGR, 116, 2011.


[PDF] Close, S., P. Colestock, M. Kelley, L. Cox, N. Lee, Electromagnetic Pulses from Hypervelocity Impacts, JGR, 115, 2010.

Conference Proceedings


Krishnamoorthy, S. and S. Close (2015), Particle in Cell (PIC) simulations of plasma-electrode interactions for Reentry Blackout Alleviation, AIAA Plasmadynamics and Lasers Conference, Paper AIAA 2015-3369.

Goel, A. and S. Close (2015), Electrical Anomalies on Spacecraft due to Hypervelocity Impacts, IEEE Aerospace.


Fletcher, A., D. Mathias, and S. Close (2015), Susceptibility of spacecraft to impact-induced electromagnetic pulses, IEEE Reliability and Maintainability Symposium.

Tarantino, P., N. Lee, S. Close, and D. Lauben (2014), Faraday Plate Array Analysis of Hypervelocity Impact Experiments, SCTC.

Goel, A., P. M. Tarantino, D. S. Lauben, and S. Close (2014), Design and Testing of Miniaturized Plasma Sensor for Space Plasma Diagnostics, SCTC.


Li, A., S. Close, Orbital debris parameter estimation from vertical pointing radar, IAC, 2013.

Lee, N., S. Close, R. Srama, Composition of plasmas formed from debris impacts on spacecraft surfaces, Sixth European Conference on Space Debris, 2013.

Linscott, I., S. Close, A. Goel, N. Lee, S. Green, N. Bryant, ISOLDE: ISS-based study of LEO debris and meteoroid electrical effects, Sixth European Conference on Space Debris, 2013.


[PDF] Houts, S., E. Jens, K. Shish, N. Lee, S. Russell, P. Kimball, The Stanford Young Astronauts program: A model for sustainable outreach, IAC, Paper 12-E1.1.4, 2012.

Li, A., S. Close, J. Markkanen, EISCAT space debris after the International Polar Year (IPY), IAC, Paper 12.A6.1.8, 2012.

Garrett, H. and S. Close, Meteoroid-induced ESD and EMI/EMP effects on spacecraft – a review, SCTC, 2012.

Johnson, T., S. Close, and I. Linscott, Satellite failure from hypervelocity micrometeoroid impacts: Beam-plasma instability RF emission, SCTC, 2012.

Vayner, B. V., D. C. Ferguson, R. C. Hoffmann, A. T. Wheelock, J. J. Likar, J. L. Prebola, Jr., D. H. Crider, T. A. Schneider, J. A. Vaughn, B. Hoang, K. Steele, S. Close, A. Goel, M. W. Crofton, J. A. Young, and J. M. Bodeau, Preliminary results from U.S. round-robin tests, SCTC, 2012.


[PDF] Goel, A., N. Lee, S. Close, D. Lauben, T. Johnson, and I. Linscott, Electrical effects of hypervelocity impacts, IAC, 2011.

[PDF] Volz, R. and S. Close, A compressed sensing approach to observing distributed radar targets, URSI GASS, 2011.

[PDF] Close, S., M. Kelley, A. Fletcher, N. Lee, P. Colestock, RF signatures of hypervelocity impacts on spacecraft, Proc. 3rd AIAA Atmos. Space. Env., 2011.

[PDF] Johnson, T., I. Linscott, S. Close, D. Strauss, N. Lee, R. Adamo, A. Mocker, R. Srama, S. Bugiel, Detection and analysis of RF data from hypervelocity impacts, Proc. 3rd AIAA Atmos. Space. Env., 2011.

[PDF] Yee, J., S. Close, Diffusion of plasmas from ablating meteoroids in the ionosphere, Proc. 3rd AIAA Atmos. Space. Env., 2011.

[PDF] Lee, N., S. Close, D. Lauben, I. Linscott, A. Goel, T. Johnson, R. Srama, S. Bugiel, A. Mocker, Study of hypervelocity impact plasma expansion, Proc. 3rd AIAA Atmos. Space. Env., 2011.


[WWW] Krishnamoorthy, S., Alleviation of reentry communications blackout by electrostatic methods, Ph.D. thesis, 2017

 [WWW] Li, A., Neutral density estimation from multiple equivalent platforms, Ph.D. thesis, 2016

[WWW] Yee, J., Simulation of dusty plasmas and characterization of their effects on irregularities in the upper atmosphere, Ph.D. thesis, 2016

[WWW] Goel, A., Detection and characterization of meteoroid and orbital debris impacts in space, Ph.D. thesis, 2016

[WWW] Johnson, T., Detection and analysis of the electromagnetic pulse from hypervelocity impact plasma expansion, Ph.D. thesis, 2015

[WWW] Fletcher, A., Plasma production and radiation from meteoroid impacts on spacecraft, Ph.D. thesis, 2015.

[PDF] Volz, R., Theory and Application of Sparsity for Radar Sensing of Ionospheric Plasma, Ph.D. thesis, 2014

Sivasankaran, R., Thunderstorm-induced enhancements in the E-region ionosphere, Eng. thesis, 2014

Kumar, V., A study of mid-latitude E-region anomalies in the ionosphere due to lightning, Eng. thesis, 2013

[WWW] Lee, N., Understanding spacecraft electrical anomalies: theory and experiments characterizing hypervelocity impact plasma dynamics, Ph.D. thesis, 2012.