Paul Withers

Peer Reviewed Papers

• Withers (2014) Predictions of the effects of Mars' encounter with comet C/2013 A1 (Siding Spring) upon metal species in its ionosphere, Geophysical Research Letters, 41, 6635-6643
  420K PDF

• Withers, Moore, Cahoy, and Beerer (2014) How to process radio occultation data: 1. From time series of frequency residuals to vertical profiles of atmospheric and ionospheric properties, Planetary and Space Science, 101, 77-88
  977K PDF

• Peter, Paetzold, Molina-Cuberos, Witasse, Gonzalez-Galindo, Withers, Bird, Haeusler, Hinson, Tellmann, and Tyler (2014) The dayside ionospheres of Venus and Mars: Comparing a one-dimensional photochemical model with MaRS (Mars Express) and VeRa (Venus Express) observations, Icarus, 233, 66-82
  5.3M PDF

• Withers, Fallows, and Matta (2014) Predictions of electron temperature in the Mars ionosphere and their effects on electron densities, Geophysical Research Letters, 41, 2681-2686
  225K PDF

• Riousset, Paty, Lillis, Fillingim, England, Withers, and Hale (2014) Electrodynamics of the Martian dynamo region near magnetic cusps and loops, Geophysical Research Letters, 41, 1119-1125
  2.2M PDF

• Matta, Galand, Moore, Mendillo, and Withers (2014) Numerical simulations of ion and electron temperatures in the ionosphere of Mars: Multiple ions and diurnal variations, Icarus, 227, 78-88
  897K PDF

• Mendillo, Marusiak, Withers, Morgan, and Gurnett (2013) A new semi-empirical model of the peak electron density of the Martian ionosphere, Geophysical Research Letters, 40, 5361-5365
  588K PDF

• Withers, Christou, and Vaubaillon (2013) Meteoric ion layers in the ionospheres of Venus and Mars: Early observations and consideration of the role of meteor showers, Advances in Space Research, 52, 1207-1216
  854K PDF

• Mendillo, Narvaez, Withers, Matta, Kofman, and Mouginot (2013) Variability in ionospheric total electron content at Mars, Planetary and Space Science, 86, 117-129
  3.3M PDF

• Riousset, Paty, Lillis, Fillingim, England, Withers, and Hale (2013) Three-dimensional multifluid modeling of atmospheric electrodynamics in Mars' dynamo region, Journal of Geophysical Research, 118, 3647-3659
  2.2M PDF

• Matta, Withers, and Mendillo (2013) The composition of Mars' topside ionosphere: Effects of hydrogen, Journal of Geophysical Research, 118, 2681-2693
  1.2M PDF

• Girazian and Withers (2013) The dependence of peak electron density in the ionosphere of Mars on solar irradiance, Geophysical Research Letters, 40, 1960-1964
  252K PDF

• Withers (2013) Landing spacecraft on Mars and other planets: An opportunity to apply introductory physics, American Journal of Physics, 81, 565-569
  1.8M PDF

• Withers (2013) A smoothing technique for improving atmospheric reconstruction for planetary entry probes, Planetary and Space Science, 79-80, 52-55
  996K PDF

• Withers and Pratt (2013) An observational study of the response of the upper atmosphere of Mars to lower atmospheric dust storms, Icarus, 225, 378-389
  827K PDF

• Withers, Fillingim, Lillis, Haeusler, Hinson, Tyler, Paetzold, Peter, Tellmann, and Witasse (2012) Observations of the nightside ionosphere of Mars by the Mars Express Radio Science Experiment MaRS, Journal of Geophysical Research, 117, A12307, doi:10.1029/2012JA018185
  531K PDF

• Withers, Fallows, Girazian, Matta, Haeusler, Hinson, Tyler, Morgan, Paetzold, Peter, Tellmann, Peralta, and Witasse (2012) A clear view of the multifaceted dayside ionosphere of Mars, Geophysical Research Letters, 39, L18202, doi:10.1029/2012GL053193
  284K PDF

• Withers (2012) Empirical predictions of martian surface pressure in support of the landing of Mars Science Laboratory, Space Science Reviews, 170, 837-860
  1.1M PDF

• Vasavada, Chen, Barnes, Burkhart, Cantor, Dwyer-Cianciolo, Fergason, Hinson, Justh, Kass, Lewis, Mischna, Murphy, Rafkin, Tyler, and Withers (2012) Assessment of environments for Mars Science Laboratory entry, descent, and surface operations, Space Science Reviews, 170, 793-835
  8.8M PDF

• Lollo, Withers, Fallows, Girazian, Matta, and Chamberlin (2012) Numerical simulations of the ionosphere of Mars during a solar flare, Journal of Geophysical Research, 117, A05314, doi:10.1029/2011JA017399
  845K PDF

• Sheel, Haider, Withers, Kozarev, Jun, Kang, Gronoff, and Simon Wedlund (2012) Numerical simulation of the effects of a solar energetic particle event on the ionosphere of Mars, Journal of Geophysical Research, 117, A05312, doi:10.1029/2011JA017455
  854K PDF

• Mendillo, Lollo, Withers, Matta, Paetzold, and Tellmann (2011) Modeling Mars' ionosphere with constraints from same-day observations by Mars Global Surveyor and Mars Express, Journal of Geophysical Research, 116, A11303, doi:10.1029/2011JA016865
  2.5M PDF

• Xiong, Wan, Liu, Withers, Zhao, Ning, Wei, Le, Ren, Chen, He, and Liu (2011) Ionospheric response to the X-class solar flare on 7 September 2005, Journal of Geophysical Research, 116, A11317, doi:10.1029/2011JA016961
  1.7M PDF

• Withers, Pratt, Bertaux, and Montmessin (2011) Observations of thermal tides in the middle atmosphere of Mars by the SPICAM instrument, Journal of Geophysical Research, 116, E11005, doi:10.1029/2011JE003847
  1.9M PDF

• Withers (2011) Attenuation of radio signals by the ionosphere of Mars: Theoretical development and application to MARSIS observations, Radio Science, 46, RS2004, doi:10:1029/2010RS004450
  725K PDF

• Withers and Catling (2010) Observations of atmospheric tides at the season and latitude of the Phoenix atmospheric entry, Geophysical Research Letters, 37, L24204, doi:10.1029/2010GL045382
  158K PDF

• Lillis, Brain, England, Withers, Fillingim, and Safaeinili (2010) Total electron content in the Mars ionosphere: Temporal studies and dependence on solar EUV flux, Geophysical Research Letters, 115, A11314, doi:10.1029/2010JA015698
  1.9M PDF

• Withers (2010) Trajectory and atmospheric structure from entry probes: Demonstration of a real-time reconstruction technique using a simple direct-to-Earth radio link, Planetary and Space Science, 58, 2044-2049
  603K PDF

• Opgenoorth, Dhillon, Rosenqvist, Lester, Edberg, Milan, Withers and Brain (2010) Dayside ionospheric conductivities at Mars, Planetary and Space Science, 58, 1139-1151
  1.4M PDF

• Withers (2010) Prediction of uncertainties in atmospheric properties measured by radio occultation experiments, Advances in Space Research, 46, 58-73
  597K PDF

• Hathi, Ball, Colombatti, Ferri, Leese, Towner, Withers, Fulchigioni and Zarnecki (2009) Huygens HASI servo accelerometer: A review and lessons learned, Planetary and Space Science, 57, 1321-1333
  1.7M PDF

• Withers (2009) A review of observed variability in the dayside ionosphere of Mars, Advances in Space Research, 44, 277-307
  3.1M PDF

• Paetzold, Tellmann, Haeusler, Bird, Tyler, Christou and Withers (2009) A sporadic layer in the Venus lower ionosphere of meteoric origin, Geophysical Research Letters, 36, L05203, doi:10.1029/2008GL035875
  253K PDF

• Withers, Mendillo, Hinson and Cahoy (2008) Physical characteristics and occurrence rates of meteoric plasma layers detected in the martian ionosphere by the Mars Global Surveyor Radio Science Experiment, Journal of Geophysical Research, 113, A12314, doi:10.1029/2008JA013636
  6.6M PDF

• Withers (2008) Theoretical models of ionospheric electrodynamics and plasma transport, Journal of Geophysical Research, 113, A07301, doi:10.1029/2007JA012918.
  3.0M PDF

• Colombatti, Withers, Ferri, Aboudan, Ball, Bettanini, Gaborit, Harri, Hathi, Leese, Makinen, Stoppato, Towner, Zarnecki, Angrilli and Fulchignoni (2008) Reconstruction of the trajectory of the Huygens probe using the Huygens Atmospheric Structure Instrument (HASI), Planetary and Space Science, 56, 586-600.
  1.3M PDF

• Christou, Vaubaillon, and Withers (2008) The P/Halley stream: meteor showers on Earth, Venus, and Mars, Earth, Moon, and Planets, 102, 125-131.
  261K PDF

• Crosby, Bothmer, Facius, Griessmeier, Moussas, Panasyuk, Romanova, and Withers (2008) Interplanetary Space Weather and its Planetary Connection, Space Weather, 6, S01003, doi:10.1029/2007SW000361.
  406K PDF

• Christou, Vaubaillon, and Withers (2007) The dust trail complex of comet 79P/du Toit-Hartley and meteor outbursts at Mars, Astronomy and Astrophysics, 471, 321-329.
  495K PDF

• Withers (2007) A technique to determine the mean molecular mass of a planetary atmosphere using pressure and temperature measurements made by an entry probe: Demonstration using Huygens data, Planetary and Space Science, 55, 1959-1963
  209K PDF

• Montabone, Lewis, Read, and Withers (2006) Reconstructing the weather on Mars at the time of the MERs and Beagle 2 landings, Geophysical Research Letters, 33, L19202, doi:10.1029/2006GL026565.
  731K PDF

• Withers and Smith (2006) Atmospheric entry profiles from the Mars Exploration Rovers Spirit and Opportunity, Icarus, 185, 133-142, doi:10.1016/j.icarus.2006.06.013.
  558K PDF
  Supplemental Information: suppinfo_README.txt, suppinfo_mer1table.txt, and suppinfo_mer2table.txt

• Mendillo, Withers, Hinson, Rishbeth, and Reinisch (2006) Effects of solar flares on the ionosphere of Mars, Science, 311, 1135-1138, doi:10.1126/science.112209.
  249K PDF

• Bougher, Bell, Murphy, Lopez-Valverde, and Withers (2006) Polar warming in the Mars thermosphere: Seasonal variations owing to changing insolation and dust distributions, Geophysical Research Letters, 33, L02203, doi:10.1029/2005GL024059.
  306K PDF

• Withers (2006) Mars Global Surveyor and Mars Odyssey Accelerometer observations of the martian upper atmosphere during aerobraking, Geophysical Research Letters, 33, L02201, doi:10.1029/2005GL024447.
  241K PDF

• Fulchignoni and 42 colleagues, including Withers (2005) In situ measurements of the physical characteristics of Titan's environment, Nature, 438, 785-791, doi:10.1038/nature04314.
  533K PDF

• Withers and Mendillo (2005) Response of peak electron densities in the martian ionosphere to day-to-day changes in solar flux due to solar rotation, Planetary and Space Science, 53, 1401-1418, doi:10.1016/j.pss.2005.07.010.
  450K PDF

• Withers, Mendillo, Rishbeth, Hinson, and Arkani-Hamed (2005) Ionospheric characteristics above Martian crustal magnetic anomalies, Geophysical Research Letters, 32, L16204, doi:10.1029/2005GL023483.
  429K PDF

• Withers, Bougher, and Keating (2003) The effects of topographically-controlled thermal tides in the martian upper atmosphere as seen by the MGS accelerometer, Icarus, 164, 14-32
  415K PDF

• Withers, Towner, Hathi, and Zarnecki (2003) Analysis of entry accelerometer data: A case study of Mars Pathfinder, Planetary and Space Science, 51, 541-561
  417K PDF

• Withers, Lorenz, and Neumann (2002) Comparison of Viking descent data and MOLA topography reveals kilometer-scale offset in Mars atmosphere profiles, Icarus, 159, 259 - 261
  206K PDF

• Nockolds and Withers (2002) Comment and reply on "Meteor storm evidence against the recent formation of lunar crater Giordano Bruno" by Paul Withers, Meteoritics and Planetary Science, 37, 465 - 466
  35K PDF

• Withers and Neumann (2001) Enigmatic northern plains of Mars, Nature, 410, 651
  628K PDF and 336K gif figure (Image Credit: MOLA Science Team)

• Withers (2001) Meteor storm evidence against the recent formation of lunar crater Giordano Bruno, Meteoritics and Planetary Science, 36, 525 - 529
  803K PDF and jpg figures (fig1, fig2, fig3.)

• Lorenz, Lunine, Withers, and McKay, (2001) Titan, Mars and Earth: Entropy production by latitudinal heat transport, Geophysical Research Letters, 28, 415-418
  108K PDF

Other Publications

• Withers and Barnes (2012) Using satellites to probe extrasolar planet formation, astro-ph publication arXiv:1204.0976v1
  79K PDF

• Withers and Barnes (2012) Using satellites to probe extrasolar planet formation, Proceedings of IAU Symposium 276, doi:10.1017/S174392000038
  55K PDF

• Withers (2012) How do meteoroids affect Venus's and Mars's ionospheres?, Eos, 93(35), 337-338, doi: 10.1029/2012EO350002
  718K PDF

• Clarke, Schmidt, Baumgarder, Carveth, Matta, Mendillo, Moore, and Withers (2010) White paper on comparative planetary exospheres, white paper submitted to Heliophysics Decadal Survey
  924K PDF

• Withers and Catling (2010) The Phoenix Atmospheric Structure Experiment (ASE): Data processing and scientific results, proceedings of the Seventh International Planetary Probe Workshop
  1.3M PDF

• Atkinson and 55 colleagues, including Withers (2009) Entry probe missions to giant planets, white paper submitted to Planetary Science Decadal Survey
  136K PDF

• Kursinski and 33 colleagues, including Withers (2009) Dual satellite Mars climate and chemistry mission concept, white paper submitted to Planetary Science Decadal Survey
  1.1M PDF

• Mischna and 21 colleagues, including Withers (2009) Atmospheric science research priorities for Mars, white paper submitted to Planetary Science Decadal Survey
  114K PDF

• Beebe and 39 colleagues, including Withers (2009) Data management, preservation and the future of the PDS, white paper submitted to Planetary Science Decadal Survey
  193K PDF

• Withers and 42 colleagues (2009) The ionosphere of Mars and its importance for climate evolution, white paper submitted to Planetary Science Decadal Survey
  212K PDF

• Johnson, Amend, Steele, Bougher, Rafkin, Withers, Plescia, Hamilton, Tripathi and Heldmann (2008) Mars Science Goals, Objectives, Investigations, and Priorities: 2008, Report from the NASA Mars Exploration Program Analysis Group (MEPAG)
  347K PDF

• Mendillo and Withers (2008) Solar flare effects upon the ionospheres of Earth and Mars, in "Radio Sounding and Plasma Physics" (eds. Song, Foster, Mendillo, and Bilitza), American Institute of Physics Conference Proceedings, 974, 58-70.
  2.9M PDF

• Withers (2005) What is a planet?, Eos, 86(36), 326, doi:10.1029/2005EO360004.
  53K PDF

• Mendillo and Withers (2004) CEDAR workshop report on session CA1: Comparative aeronomy on Earth and Mars, CEDAR Post, 49 (Fall 2004), 4-5.
  968K PDF

• Farrell and 11 colleagues, including Withers. (2004) Report from the Mars Human Precursor Science Steering Group Atmosphere Focus Team.
  Incorporated into: Beaty et al. (2005) An analysis of the precursor measurements of Mars needed to reduce the risk of the first human mission to Mars, MEPAG report posted online in June 2005.
  Presentation 914K PDF
  White Paper 181K PDF
  MEPAG Report 1.7M PDF
  

• Withers (2004) Should we believe atmospheric temperatures measured by entry accelerometers travelling at "slow" near-sonic speeds?, in Proceedings of the Second International Planetary Probe Workshop, NASA Ames Research Center, California, 23-27 August 2004, NASA/CP-2004-213456, p. 13-20.
  314K PDF

• Withers, Towner, Hathi, and Zarnecki (2004) Review of the trajectory and atmospheric structure reconstruction for Mars Pathfinder, in Proceedings of the International Workshop Planetary Probe Atmospheric Entry and Descent Trajectory Analysis and Science, 6-9 October 2003, Lisbon, Portugal. Edited by A. Wilson. ESA SP-544, Noordwijk, Netherlands: ESA Publications Division, ISBN 92-9092-855-7, 2004, p. 163 - 174
  1.4M PDF

• Grier and 28 colleagues, including Withers (2002) Defining long term goals and setting priorities for education and public outreach, in "The future of solar system exploration, 2003-2013" (ed. Sykes), Astronomical Society of the Pacific Conference Series, 272, 393-411.
  179K PDF

• Withers (2001) Atmospheric structure reconstruction using the Beagle 2 accelerometer, Technical report delivered to the Open University, Great Britain
  470K PDF