Talks
Selected conference talks
Presented by Dr. Marshall or other group members as first author:
Seminars presented by Dr. Marshall:
Presented by Dr. Marshall or other group members as first author:
- [NRSM 2021] Tarnecki, L. K. and R. A. Marshall (2021), "Meteoroid mass estimation based on single-frequency radar cross section measurements", USNC-URSI NRSM 2021, Boulder, CO, 7 January 2021.
- [VERSIM 2020] Reid, R. A., R. A. Marshall, D. M. Malaspina, and S. E. Palo (2020), "CANVAS: A CubeSat Mission to Measure the Distribution of VLF Energy Injected into the Magnetosphere by Ground-Based Sources", VERSIM 2020 Meeting, Kyoto, JP (Virtual), November 17, 2020.
- [CEDAR 2020] Tarnecki, L. K. and R. A. Marshall (2020), "Meteor Mass Determination Using FDTD Modeling", CEDAR Workshop, Santa Fe, NM, 23 June 2020. Cancelled.
- [HAO 2020] Xu, Wei and R. A. Marshall (2020), "Towards Better Understanding of Bremsstrahlung X-rays during Energetic Electron Precipitation", HAO Colloquium, Boulder, CO, March 11, 2020.
- [AGU 2019] Xu, Wei, S. J. Celestin, V. P. Paso, and R. A. Marshall (2019), "Compton Scattering Effects on the Spectral and Temporal Properties of Terrestrial Gamma-ray Flashes", AE41B-3163, AGU Fall Meeting, San Francisco, CO, December 12, 2019.
- [AGU 2019] Tarnecki, L. K., R. A. Marshall, Z. Sternovsky, T. Munsat, and M. DeLuca (2019), "Laboratory Dust Ablation Experiments to Determine Meteoric Luminous Efficiencies", AGU Fall Meeting, San Francisco, CA, 10 December 2019.
- [AGU 2019] Antunes de Sá, A. L., R. A. Marshall, W. Deierling, A. Sousa (2019), “Energetic Intra-Cloud Lightning during the RELAMPAGO Field Campaign”, AGU Fall Meeting, San Francisco, CA, December 9, 2019; AE13A-07
- [RELAMPAGO-CACTI 2019] Antunes de Sá, A. L., R. A. Marshall, W. Deierling, A. Sousa (2019), “Electric Field Mill and Lightning LF Radio Observations in the RELAMPAGO Field Campaign”, RELAMPAGO-CACTI Data Analysis Workshop, Buenos Aires, Argentina, November 19-21, 2019 .
- [IUGG GA 2019] Antunes de Sá, A. L., R. A. Marshall, W. Deierling, A. Sousa (2019), “Energetic Intra-Cloud Lightning during the RELAMPAGO Field Campaign”, IUGG General Assembly, Montréal, Canada, July 9, 2019; IUGG19-3722
- [Meteoroids 2019] Tarnecki, L. K. and R. A. Marshall (2019), "Multi-parameter FDTD Head Plasma Simulations for Radar Mass Estimation", Meteoroids, Bratislava, Slovakia, 18 June 2019.
- [AGU 2018] Antunes de Sá, A. L. and R. A. Marshall (2018), “Energetic IC Lightning Prediction Model for GLM Data”, AGU Fall Meeting, Washington, D.C., December 10, 2018; AE13B-1522
- [URSI US 2018] Antunes de Sá, A. L. and R. A. Marshall (2018), “Real-time Estimation of Ionospheric Parameters from VLF Atmospherics Using Machine-Learned Models”, URSI National Radio Science Meeting, Boulder, CO, January 6, 2018
- [NRSM 2018] Gasdia, F. and R.A. Marshall (2018), "Mapping the D-region ionosphere with a network of VLF transmitters and receivers," USNC-URSI National Radio Science Meeting, Boulder, CO, January 6, 2018.
- [URSI GA 2017] Antunes de Sá, A. L. and R. A. Marshall (2017), “Lightning Distance Estimation Using Machine-Learned Models of Lightning Radio Signals”, URSI General Assembly, Montréal, Canada, August 24, 2017.
- [AGU 2015] Marshall, R. A., P. R. Blaes, and U. S. Inan (2015), "Global occurrence of Elves and lightning-induced heating of the ionosphere from ground-based observations", AGU Fall Meeting, San Francisco, CA, December 15, 2015.
- [APS/URSI 2015] Marshall, R. A. and S. Close (2015), "Numerical modeling of radio wave scattering from meteor head plasma," in Radio Science Meeting (Joint with AP-S Symposium), 2015 USNC-URSI , vol., no., pp.254-254, 19-24 July 2015; doi: 10.1109/USNC-URSI.2015.7303538
- [AGU 2014] Marshall, R. A., M. J. Nicolls, E. Sanchez, N. Lehtinen, and J. Nielson (2015), "Effects of a Relativistic Electron Beam Interaction with the Upper Atmosphere: Ionization, X-Rays, and Optical Emissions", AGU Fall Meeting, San Francisco, CA, December 2014.
- [AGU 2013] Marshall, R. A. and J. B. Snively (2013), Very-Low-Frequency Subionospheric Remote Sensing of Thunderstorm-driven Acoustic and Gravity Waves in the D-region, AGU Fall Meeting, San Francisco, CA, December 9, 2013.
- [CEDAR 2013] Marshall, R. A. (2013), Time-domain Modeling of Lightning, VLF transmitters, and their effects on the lower ionosphere (CEDAR Postdoc Final Report), CEDAR Annual Workshop, Boulder, CO, June 20-24, 2013.
- [TEA-IS 2012] Marshall, R. A. (2012), High-speed Observations and Modeling of Elves and Associated Ionospheric Effects, TEA-IS Workshop, Malaga, Spain, June 17-22, 2012, INVITED.
- [AGU 2011] Marshall, R. A. (2011), Lightning Interaction with the Lower Ionosphere: Elve Doublets and Ring Sprites, AGU Fall Meeting, San Francisco, CA, Dec 5-9, 2011, AE21A-0221.
- [URSI GA 2011] Marshall, R. A. and U. S. Inan (2011), Model Estimates of Optical Emissions due to Lightning-Induced Electron Precipitation, URSI General Assembly, Istanbul, Turkey, August 15-19, 2011, GP2.40. [Abstract]
- [AGU 2010] Marshall, R. A., J. Bortnik, and N. Lehtinen (2010), Optical Signatures of Lightning-Induced Electron Precipitation, AGU Fall Meeting, San Francisco, CA, Dec 13-17, 2010; AE13B-01, INVITED.
- [Chapman 2009] Marshall, R. A. and U. S. Inan (2009), Ionospheric effects of Cloud-to-ground and in-cloud lightning discharges, AGU Chapman Conference on Effects of Thunderstorms and Lightning in the Upper Atmosphere, State College, PA, May 10-14, 2009.
- [AGU 2008] Marshall, R. A. and U. S. Inan (2008), Elves and Associated Ionospheric Density Perturbations due to Horizontal In-cloud Lightning EMP, Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract AE13A-0300; OUTSTANDING STUDENT PAPER AWARD.
- [URSI GA 2008] Marshall, R. A. and U. S. Inan (2008), Early VLF Perturbations Driven by Lightning-EMP Generated Density Perturbations in the Ionosphere: Model Results, URSI General Assembly, Chicago, IL, USA, August 10-15, 2008; EGH-4.
- [URSI US 2008] Marshall, R. A. and U. S. Inan (2008), Dissociative Attachment as a Possible Cause of Early VLF Perturbations, URSI National Radio Science Meeting, Boulder, CO, USA, January 3-6, 2008; GH5-10.
- [URSI Joint 2007] Marshall, R. A. and U. S. Inan (2007), The Association of Very-Low-Frequency Sferic Bursts with Sprites and Intra-cloud Lightning Activity, URSI National Radio Science Meeting, Ottawa, ON, Canada, July 23-26, 2007; FIRST PLACE, STUDENT PAPER COMPETITION.
- [AGU 2006] Marshall, R. A. and U. S. Inan (2006), Observations of Burst-like VLF Sferic Activity in Association with Sprites, AGU Fall Meeting, San Francisco, CA, Dec 11-15, 2006; AE51A-0263.
- [CEDAR 2006] Marshall, R. A. and U. S. Inan (2006), Evidence for direct cloud-to-ionosphere electrical connection through sprite and jet processes, CEDAR Workshop, Santa Fe, NM, June 19-23, 2006; SPRT-06.
- [URSI US 2006] Marshall, R. A. and U. S. Inan (2006), Early/Fast VLF Perturbations caused by Scattering from Transient Luminous Events, URSI National Radio Science Meeting, Boulder, CO, January 4-7, 2006; H/G3-1, INVITED.
- [URSI GA 2005] Marshall, R. A. and U. S. Inan (2005), Measurements of small-scale features in sprites: sizes, lifetimes and propagation, URSI General Assembly, New Delhi, India, October 23-29, 2005; HGEP.8(0465), INVITED.
- [IES 2005] Marshall, R. A. and U. S. Inan (2005), High-speed measurements of small-scale features in sprites: sizes, lifetimes and propagation, Ionospheric Effects Symposium, Alexandria, VA, May 3-5, 2005; 1B-6 (A057).
- [URSI US 2005] Marshall, R. A. and U. S. Inan (2005), High-speed Telescopic Imaging of Sprites, URSI National Radio Science Meeting, Boulder, CO, January 5-8, 2005, oral presentation H/G7-7, INVITED.
- [AGU 2004] Marshall, R. A. and U. S. Inan (2004), High Time Resolution Telescopic Imaging of Fine Structure in Sprites, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract AE51A-09; OUTSTANDING STUDENT PAPER AWARD.
Seminars presented by Dr. Marshall:
- [Dartmouth 2016] Marshall, R. A. (2016), The Earth's Atmosphere as a Natural Source of X-ray Radiation, Presented at Dartmouth College, Plasma Seminar Series, May 2016.
- [CU Boulder 2015] Marshall, R. A. (2015), Lightning Effects in Space, Presented at CU Boulder, Department of Aerospace Engineering Sciences, February 2015.
- [CU Boulder 2014] Marshall, R. A. (2014), The Artificial Relativistic Electron Beam, Presented at CU Boulder and the Laboratory of Atmospheric and Space Physics (LASP), April 2014.
- [LLNL 2014] Marshall, R. A. (2014), Numerical modeling of the lightning EMP and its interaction with the lower ionosphere, Presented at Lawrence Livermore National Laboratory (LLNL), January 2014.
- [SESS 2011] Marshall, R. A. (2011), Interactions between Lightning and the Lower Ionosphere, Presented at Stanford SESS Group Meeting, November 29, 2011.
- [KLA Tencor 2011] Marshall, R. A. (2011), High-speed Imaging of Auroral and High-energy Particle Precipitation, Presented at KLA-Tencor (Milpitas, CA), November 3, 2011.
- [VLF 2011] Marshall, R. A. (2011), Modeling of Lightning-Ionosphere Interactions, Presented at Stanford VLF Group Meeting, October 25, 2011.
- [ONR 2011] Marshall, R. A. (2011), Optical and VLF Imaging of Lightning-Ionosphere Interactions, Presented at ONR Peer Review Meeting (Washington DC), September 20, 2011.
- [SESS 2010] Marshall, R. A. (2010), Optical Signatures of Transmitter- and Lightning-induced Electron Precipitation, Presented at Stanford SESS Group Meeting, September 22, 2010.
- [Bermuda 2009] Marshall, R. A. (2009), An Introduction to Near-Earth Space Physics, Public Lecture Presented at Bermuda College, September 30, 2009.
- [BU 2009] Marshall, R. A. (2009), Ionospheric Effects of Intense Lightning Discharges, Presented at Boston University Center for Space Physics, September 9, 2009.
- [SRI 2009] Marshall, R. A. (2009), Ionospheric Effects of Intense Lightning Discharges, Presented at SRI International (Menlo Park, CA), March 12, 2009.
- [UCLA 2009] Marshall, R. A. (2009), Ionospheric Effects of Intense Lightning Discharges, Presented at UCLA Institute of Geophysics and Planetary Physics, February 20, 2009.