Expand sub-menus

Jeffrey Klenzing

Photo of JEFFREY KLENZING

Jeffrey Klenzing

  • RESEARCH AST, FIELDS AND PARTICLES
  • 301.286.6172
  • NASA/GSFC
  • Mail Code: 675
  • Greenbelt , MD 20771
  • Employer: NASA

    • Brief Bio

     Dr. Klenzing’s research interests include ionospheric electrodynamics, Ionosphere-Thermosphere coupling, and measurement techniques for thermal plasmas and winds. He completed his dissertation, “Effects of non-ideal biased grids on drifting particle distribution functions,” at the University of Texas at Dallas under the supervision of Dr. Gregory Earle in 2008. He moved to GSFC in 2009 as a NASA Postdoctoral Fellow and became a research astrophysicist in 2012.

    Current Projects

    petitSat

    Dr. Klenzing is the PI of the Plasma Enhancements in The Ionosphere-Thermosphere Satellite (petitSat), a 6U CubeSat mission designed to examine the link between plasma density enhancements observed in the topside by satellites and waves such as MSTIDs observed by ground-based imagers. petitSat will carry two instruments: the Ion Neutral Mass Spectrometer (INMS) provided by GSFC (PI: Nick Paschalidis) and the Gridded Retarding Ion Drift Sensor (GRIDS) provided by Utah State University (PI: Ryan Davidson). petitSat is scheduled to be launched in late 2022.

    Space Precipitation Impacts

    Dr. Klenzing serves as the Impacts subgroup lead for the Space Precipitation Impacts group at Goddard Space Flight Center.

    Positions/Employment

    4/2012 - Present

    Research Astrophysicist

    NASA GSFC, Greenbelt, MD
    5/2009 - 4/2012

    Postdoctoral Fellow

    NASA Postdoctoral Program, Greenbelt, MD

    Education

    Ph.D., Physics, The University of Texas at Dallas, 2008
    M.S., Physics, The University of Texas at Dallas, 2005
    B.S., Physics, The University of Texas at Dallas, 2004

    Professional Societies

    American Geophysical Union, 2004 - Present

    Professional Service

    Editorial Activities

    • Guest editor of special issue of Earth, Planets, Space - “16th International Symposium on Equatorial Aeronomy (ISEA-16), 2022” (2022-2023)
    • Guest editor of special issue of Journal of Space Weather and Space Climate - “Ionospheric plasma irregularities and their impact on radio systems” (2021-2022)
    • Guest editor and organizer of special issue of Annales Geophysicae - “C/NOFS results and Equatorial Ionospheric Dynamics” (2013-2014)


    Conferences and Workshops

    • Science Organizing Committee - International Symposium on Equatorial Aeronomy, 2022
    • Organizing Committee - Geospace Discovery Science Workshop, 2021
    • Organizing Committee - C/NOFS and Equatorial Dynamics Technical Interchange, 2013
    • Organizing Committee - C/NOFS Science Workshop, 2010

    Awards

    NASA, Group Achievement Award for the Ionospheric CONnection Explorer team, 2021

    NRL, Alan Berman Research Publication Award, 2016

    NASA, Group Achievement Award for the Firefly CubeSat team, 2014

    NASA, Group Achievement Award for the FASTSAT Instrument development team, 2011

    NASA, Postdoctoral Program Fellow, 2009-2012

    Selected Publications

    Refereed

    Klenzing, J., A. J. Halford, A. Kellerman, and B. Thompson. 2023. "Using Application Usability Levels to support tracking the health of Heliophysics." Frontiers in Astronomy and Space Sciences, 10: [10.3389/fspas.2023.1144053]

    Klenzing, J., A. J. Halford, G. Liu, et al. J. M. Smith, Y. Zhang, K. Zawdie, N. Maruyama, R. Pfaff, and R. L. Bishop. 2023. "A system science perspective of the drivers of equatorial plasma bubbles." Frontiers in Astronomy and Space Sciences, 9: [10.3389/fspas.2022.1064150]

    Klenzing, J., J. M. Smith, A. J. Halford, J. D. Huba, and A. G. Burrell. 2022. "sami2py—Overview and applications." Frontiers in Astronomy and Space Sciences, 9: [10.3389/fspas.2022.1066480]

    Le, G., D. J. Knipp, L. Rastätter, et al. G. Lu, D. S. Ozturk, J. A. Slavin, A. Maute, J. Klenzing, S. Zou, J. R. Espley, M. Purucker, M. Akhavan-Tafti, G. K. Poh, and Z. Wang. 2022. "Next generation magnetic field measurements from low-earth orbit satellites enable enhanced space weather operations." Frontiers in Astronomy and Space Sciences, 9: [10.3389/fspas.2022.1076892]

    Zawdie, K., A. Belehaki, M. Burleigh, et al. M.-Y. Chou, M. S. Dhadly, K. Greer, A. J. Halford, D. Hickey, P. Inchin, S. R. Kaeppler, J. Klenzing, V. L. Narayanan, F. Sassi, M. Sivakandan, J. M. Smith, N. Zabotin, M. D. Zettergren, and S.-R. Zhang. 2022. "Impacts of acoustic and gravity waves on the ionosphere." Frontiers in Astronomy and Space Sciences, 9: [10.3389/fspas.2022.1064152]

    Smith, J. M., and J. Klenzing. 2022. "Growin: Modeling ionospheric instability growth rates." Journal of Space Weather and Space Climate, 12: 26 [10.1051/swsc/2022021]

    Rowland, D., M. Collier, J. Keller, et al. R. Pfaff, J. Klenzing, J. McLain, J. Clemmons, and J. Hecht. 2022. "Imaging Low-Energy Ion Outflow in the Auroral Zone." Frontiers in Astronomy and Space Sciences, 9: [10.3389/fspas.2022.809367]

    Pfaff, R., E. Kudeki, H. Freudenreich, et al. D. Rowland, M. Larsen, and J. Klenzing. 2022. "Dual sounding rocket and C/NOFS satellite observations of DC electric fields and plasma density in the equatorial E and F region ionosphere at sunset." Journal of Geophysical Research: Space Physics, (In Press) [10.1029/2021ja030191]

    Pfaff, R., P. Uribe, R. Fourre, et al. J. Kujawski, N. Maynard, M. Acuña, D. Rowland, H. Freudenreich, K. Bromund, S. Martin, C. Liebrecht, R. Kramer, F. Hunsaker, R. Holzworth, M. McCarthy, W. Farrell, J. Klenzing, G. Le, A. Jacobson, J. Houser, C. Steigies, and J.-J. Berthelier. 2021. "The Vector Electric Field Investigation (VEFI) on the C/NOFS Satellite." Space Science Reviews, 217 (8): 85 [10.1007/s11214-021-00859-y]

    Liu, G., S. L. England, C. S. Lin, et al. N. M. Pedatella, J. H. Klenzing, C. R. Englert, B. J. Harding, T. J. Immel, and D. E. Rowland. 2021. "Evaluation of Atmospheric 3‐Day Waves as a Source of Day‐to‐Day Variation of the Ionospheric Longitudinal Structure." Geophysical Research Letters, 48 (15): [10.1029/2021gl094877]

    Verkhoglyadova, O. P., C. D. Bussy‐Virat, A. Caspi, et al. D. R. Jackson, V. Kalegaev, J. Klenzing, J. Nieves‐Chinchilla, and A. Vourlidas. 2021. "Addressing Gaps in Space Weather Operations and Understanding With Small Satellites." Space Weather, 19 (3): [10.1029/2020sw002566]

    Martinis, C., R. Daniell, R. Eastes, et al. J. Norrell, J. Smith, J. Klenzing, S. Solomon, and A. Burns. 2021. "Longitudinal Variation of Postsunset Plasma Depletions From the Global‐Scale Observations of the Limb and Disk (GOLD) Mission." Journal of Geophysical Research: Space Physics, 126 (2): [10.1029/2020ja028510]

    Pfaff, R., M. Larsen, T. Abe, et al. H. Habu, J. Clemmons, H. Freudenreich, D. Rowland, T. Bullett, M. Yamamoto, S. Watanabe, Y. Kakinami, T. Yokoyama, J. Mabie, J. Klenzing, R. Bishop, R. Walterscheid, M. Yamamoto, Y. Yamazaki, N. Murphy, and V. Angelopoulos. 2020. "Daytime Dynamo Electrodynamics With Spiral Currents Driven by Strong Winds Revealed by Vapor Trails and Sounding Rocket Probes." Geophysical Research Letters, 47 (15): [10.1029/2020gl088803]

    Klenzing, J., R. Davidson, S. Jones, et al. C. Martinis, K. Zawdie, G. Earle, J. Smith, A. Halford, S. Noel, N. Paschalidis, R. Pfaff, and E. Robertson. 2020. "The petitSat Mission – Science Goals and Instrumentation." Advances in Space Research, 66 (1): 107-115 [10.1016/j.asr.2019.12.013]

    Halford, A. J., A. C. Kellerman, K. Garcia-Sage, et al. J. Klenzing, B. A. Carter, R. M. McGranaghan, T. Guild, C. Cid, C. J. Henney, N. Y. Ganushkina, A. G. Burrell, M. Terkildsen, D. T. Welling, S. A. Murray, K. Leka, J. P. McCollough, B. J. Thompson, A. Pulkkinen, S. F. Fung, S. Bingham, M. M. Bisi, M. W. Liemohn, B. M. Walsh, and S. K. Morley. 2019. "Application Usability Levels: A Framework for Tracking Project Product Progress." J. Space Weather Space Clim. , 9: A34 [https://doi.org/10.1051/swsc/2019030 ]

    Burrell, A. G., A. Halford, J. Klenzing, et al. R. A. Stoneback, S. K. Morley, A. M. Annex, K. M. Laundal, A. C. Kellerman, D. Stansby, and J. Ma. 2018. "Snakes on a Spaceship—An Overview of Python in Heliophysics." Journal of Geophysical Research: Space Physics, 123 (12): 2018JA025877 [10.1029/2018ja025877]

    Stoneback, R. A., A. G. Burrell, J. Klenzing, and M. D. Depew. 2018. "PYSAT: Python Satellite Data Analysis Toolkit." Journal of Geophysical Research: Space Physics, 123: 5271–5283 [10.1029/2018ja025297]

    Collier, M. R., D. Chornay, J. Clemmons, et al. J. Keller, J. Klenzing, J. Kujawski, J. McLain, R. Pfaff, D. Rowland, and M. Zettergren. 2015. "VISIONS remote observations of a spatially-structured filamentary source of energetic neutral atoms near the polar cap boundary during an auroral substorm." Advances in Space Research, 56 (10): 2097-2105 [10.1016/j.asr.2015.08.010]

    Drob, D. P., J. T. Emmert, J. W. Meriwether, et al. J. J. Makela, E. Doornbos, M. Conde, G. Hernandez, J. Noto, K. A. Zawdie, S. E. McDonald, J. D. Huba, and J. H. Klenzing. 2015. "An update to the Horizontal Wind Model (HWM): The quiet time thermosphere." Earth and Space Science, 2 (7): 301-319 [10.1002/2014ea000089]

    Kelley, M. C., F. S. Rodrigues, R. F. Pfaff, and J. Klenzing. 2014. "Observations of the generation of eastward equatorial electric fields near dawn." ANNALES GEOPHYSICAE, 32: 1169-1175 [10.5194/angeo-32-1169-2014]

    Klenzing, J., O. de La Beaujardiere, L. C. Gentile, et al. J. Retterer, F. S. Rodrigues, and R. A. Stoneback. 2014. "C/NOFS results and equatorial ionospheric dynamics Preface." ANNALES GEOPHYSICAE, 32: 1303-1303 [10.5194/angeo-32-1303-2014]

    Klenzing, J. H., A. G. Burrell, R. A. Heelis, et al. J. Huba, R. F. Pfaff, and F. Simoes. 2013. "Exploring the role of ionospheric drivers during the extreme solar minimum of 2008." Annales Geophysicae, 31: 2147-2156 [10.5194/angeo-31-2147-2013]

    Simoes, F., R. F. Pfaff, H. T. Freudenreich, et al. J. H. Klenzing, D. E. Rowland, K. Bromund, E. L. Kepko, G. Le, M. C. Liebrecht, S. C. Martin, and P. Uribe. 2013. "Equatorial ionosphere semiannual oscillation investigated from Schumann resonance measurements on board the C/NOFS satellite." Journal of Geophysical Research (Atmospheres), 118: 12,045-12,051 [10.1002/jgrd.50797]

    Klenzing, J. H., F. Simoes, S. Ivanov, et al. D. Bilitza, R. A. Heelis, and D. E. Rowland. 2013. "Performance of the IRI-2007 model for equatorial topside ion density in the African sector for low and extremely low solar activity." Advances in Space Research, 52: 1780-1790 [10.1016/j.asr.2012.09.030]

    Ngwira, C., J. H. Klenzing, J. Olwendo, et al. F. M. D'ujanga, R. Stoneback, and P. Baki. 2013. "A study of intense ionospheric scintillation observed during a quiet day in the East African low latitude region." Radio Science, 48: [10.1002/rds.20045]

    Haaser, R. A., R. Davidson, R. A. Heelis, et al. G. D. Earle, S. Venkatraman, and J. H. Klenzing. 2013. "Storm time meridional wind perturbations in the equatorial upper thermosphere." Journal of Geophysical Research (Space Physics), 118: 2756-2764 [10.1002/jgra.50299]

    Ngwira, C. M., J. Klenzing, J. Olwendo, et al. F. M. D'ujanga, R. Stoneback, and P. Baki. 2013. "A study of intense ionospheric scintillation observed during a quiet day in the East African low-latitude region." RADIO SCIENCE, 48: 396-405 [10.1002/rds.20045]

    Simoes, F., R. F. Pfaff, M. Hamelin, et al. J. H. Klenzing, H. T. Freudenreich, C. Beghin, J.-J. Berthelier, K. Bromund, R. Grard, J.-P. Lebreton, S. C. Martin, D. E. Rowland, D. Sentman, Y. Takahashi, and Y. Yair. 2012. "Using Schumann Resonance measurements for constraining the water abundance on the giant planets - implications for the Solar System formation." The Astrophysical Journal, 750:85: [10.1088/0004-637X/750/1/85]

    Aveiro, H. C., D. L. Hysell, R. G. Caton, et al. K. M. Groves, J. H. Klenzing, R. F. Pfaff, R. Stoneback, and R. A. Heelis. 2012. "Three-dimensional numerical simulations of equatorial spread F: Results and observations in the Pacific sector." Journal of Geophysical Research (Space Physics), 117: A03325 [10.1029/2011JA017077]

    Simoes, F., R. F. Pfaff, J.-J. Berthelier, and J. H. Klenzing. 2012. "A Review of Low Frequency Electromagnetic Wave Phenomena Related to Tropospheric-Ionospheric Coupling Mechanisms." Space Science Reviews, 168: 551-593 [10.1007/s11214-011-9854-0]

    Simoes, F., J. H. Klenzing, S. Ivanov, et al. R. F. Pfaff, H. T. Freudenreich, D. Bilitza, D. E. Rowland, K. Bromund, M. C. Liebrecht, S. C. Martin, P. W. Schuck, P. Uribe, and T. Yokoyama. 2012. "Detection of Ionospheric Alfven Resonator signatures in the equatorial ionosphere." Journal of Geophysical Research (Space Physics), 117: [10.1029/2012JA017709]

    Klenzing, J. H., and D. E. Rowland. 2012. "The fixed-bias Langmuir probe on the C/NOFS satellite: calibration and validation." Reviews of Scientific Instruments, 83: 114501 [10.1063/1.4766333]

    Haaser, R. A., G. D. Earle, R. A. Heelis, et al. J. Klenzing, R. Stoneback, W. R. Coley, and A. G. Burrell. 2012. "Characteristics of low-latitude ionospheric depletions and enhancements during solar minimum." Journal of Geophysical Research (Space Physics), 117: [10305-10.1029/2012JA017814]

    Klenzing, J. H., F. Simoes, S. Ivanov, et al. R. A. Heelis, D. Bilitza, R. Pfaff, and D. Rowland. 2011. "Topside equatorial ionospheric density and composition during and after extreme solar minimum." Journal of Geophysical Research (Space Physics), 116: [12330-10.1029/2011JA017213]

    Klenzing, J. H., D. E. Rowland, R. F. Pfaff, et al. G. Le, H. T. Freudenreich, R. A. Haaser, A. G. Burrell, R. A. Stoneback, W. R. Coley, and R. A. Heelis. 2011. "Observations of low-latitude plasma density enhancements and their associated plasma drifts." Journal of Geophysical Research (Space Physics), 116: A09324 [10.1029/2011JA016711]

    Rowland, D. E., M. R. Collier, J. B. Sigwarth, et al. S. L. Jones, J. K. Hill, R. Benson, M. Choi, D. Chornay, J. Cooper, S. Feng, N. Gill, C. Goodloe, L. Han, H. Hancock, F. Hunsaker, N. Jones, J. W. Keller, J. Klenzing, I. Kleyner, T. Moore, K. Ogilvie, R. Pfaff, T. Price, J. Roman, M. Rodruiguez, P. Rozmarynowski, M. Saulino, S. Sheikh, K. Simms, A. Yew, E. Young, J. Kujawski, M. Boudreaux, J. Casas, D. Myre, and B. Smith. 2011. "Science of opportunity: Heliophysics on the FASTSAT mission and STP-S26." 2011 Aerospace Conference, [10.1109/aero.2011.5747235]

    Haaser, R. A., G. D. Earle, R. A. Heelis, W. R. Coley, and J. H. Klenzing. 2010. "Low‐latitude measurements of neutral thermospheric helium dominance near 400 km during extreme solar minimum." Journal of Geophysical Research (Space Physics), 115: A11318 [10.1029/2010JA015325]

    Davidson, R. L., G. D. Earle, J. H. Klenzing, and R. A. Heelis. 2010. "A numerical study of geometry dependent errors in velocity, temperature, and density measurements from single grid planar retarding potential analyzers." Physics of Plasmas, 17: 082901 [10.1063/1.3457931]

    Pfaff, R., D. Rowland, H. Freudenreich, et al. K. Bromund, G. Le, M. Acuna, J. Klenzing, C. Liebrecht, S. Martin, W. J. Burke, N. C. Maynard, D. E. Hunton, P. A. Roddy, J. O. Ballenthin, and G. R. Wilson. 2010. "Observations of DC electric fields in the low-latitude ionosphere and their variations with local time, longitude, and plasma density during extreme solar minimum." Journal of Geophysical Research (Space Physics), 115: [12324-10.1029/2010JA016023]

    Klenzing, J. H., G. D. Earle, R. A. Heelis, and W. R. Coley. 2009. "A statistical analysis of systematic errors in temperature and ram velocity estimates from satellite-borne retarding potential analyzers." Physics of Plasmas, 16: 052901 [10.1063/1.3125311]

    Klenzing, J. H., G. D. Earle, and R. A. Heelis. 2008. "Errors in ram velocity and temperature measurements inferred from satellite-borne retarding potential analyzers." Physics of Plasmas, 15: 062905 [10.1063/1.2936270]

    Earle, G. D., J. H. Klenzing, P. A. Roddy, et al. W. A. Macaulay, M. D. Perdue, and E. L. Patrick. 2007. "A new satellite-borne neutral wind instrument for thermospheric diagnostics." Review of Scientific Instruments, 78: 114501 [10.1063/1.2813343]

    Non-Refereed

    Klenzing, J. H., I. Seker, R. F. Pfaff, et al. D. E. Rowland, S. F. Fung, and J. D. Mathews. 2011. "Multi-instrument observations of an MSTID over Arecibo Observatory." General Assembly and Scientific Symposium; 2011 XXXth URSI; AUG 2011 1-4.

    Brief Bio

     Dr. Klenzing’s research interests include ionospheric electrodynamics, Ionosphere-Thermosphere coupling, and measurement techniques for thermal plasmas and winds. He completed his dissertation, “Effects of non-ideal biased grids on drifting particle distribution functions,” at the University of Texas at Dallas under the supervision of Dr. Gregory Earle in 2008. He moved to GSFC in 2009 as a NASA Postdoctoral Fellow and became a research astrophysicist in 2012.

    Selected Publications

    Refereed

    Klenzing, J., A. J. Halford, A. Kellerman, and B. Thompson. 2023. "Using Application Usability Levels to support tracking the health of Heliophysics." Frontiers in Astronomy and Space Sciences 10 [10.3389/fspas.2023.1144053]

    Klenzing, J., A. J. Halford, G. Liu, et al. J. M. Smith, Y. Zhang, K. Zawdie, N. Maruyama, R. Pfaff, and R. L. Bishop. 2023. "A system science perspective of the drivers of equatorial plasma bubbles." Frontiers in Astronomy and Space Sciences 9 [10.3389/fspas.2022.1064150]

    Klenzing, J., J. M. Smith, A. J. Halford, J. D. Huba, and A. G. Burrell. 2022. "sami2py—Overview and applications." Frontiers in Astronomy and Space Sciences 9 [10.3389/fspas.2022.1066480]

    Le, G., D. J. Knipp, L. Rastätter, et al. G. Lu, D. S. Ozturk, J. A. Slavin, A. Maute, J. Klenzing, S. Zou, J. R. Espley, M. Purucker, M. Akhavan-Tafti, G. K. Poh, and Z. Wang. 2022. "Next generation magnetic field measurements from low-earth orbit satellites enable enhanced space weather operations." Frontiers in Astronomy and Space Sciences 9 [10.3389/fspas.2022.1076892]

    Zawdie, K., A. Belehaki, M. Burleigh, et al. M.-Y. Chou, M. S. Dhadly, K. Greer, A. J. Halford, D. Hickey, P. Inchin, S. R. Kaeppler, J. Klenzing, V. L. Narayanan, F. Sassi, M. Sivakandan, J. M. Smith, N. Zabotin, M. D. Zettergren, and S.-R. Zhang. 2022. "Impacts of acoustic and gravity waves on the ionosphere." Frontiers in Astronomy and Space Sciences 9 [10.3389/fspas.2022.1064152]

    Smith, J. M., and J. Klenzing. 2022. "Growin: Modeling ionospheric instability growth rates." Journal of Space Weather and Space Climate 12 26 [10.1051/swsc/2022021]

    Rowland, D., M. Collier, J. Keller, et al. R. Pfaff, J. Klenzing, J. McLain, J. Clemmons, and J. Hecht. 2022. "Imaging Low-Energy Ion Outflow in the Auroral Zone." Frontiers in Astronomy and Space Sciences 9 [10.3389/fspas.2022.809367]

    Pfaff, R., E. Kudeki, H. Freudenreich, et al. D. Rowland, M. Larsen, and J. Klenzing. 2022. "Dual sounding rocket and C/NOFS satellite observations of DC electric fields and plasma density in the equatorial E and F region ionosphere at sunset." Journal of Geophysical Research: Space Physics (In Press) [10.1029/2021ja030191]

    Pfaff, R., P. Uribe, R. Fourre, et al. J. Kujawski, N. Maynard, M. Acuña, D. Rowland, H. Freudenreich, K. Bromund, S. Martin, C. Liebrecht, R. Kramer, F. Hunsaker, R. Holzworth, M. McCarthy, W. Farrell, J. Klenzing, G. Le, A. Jacobson, J. Houser, C. Steigies, and J.-J. Berthelier. 2021. "The Vector Electric Field Investigation (VEFI) on the C/NOFS Satellite." Space Science Reviews 217 (8): 85 [10.1007/s11214-021-00859-y]

    Liu, G., S. L. England, C. S. Lin, et al. N. M. Pedatella, J. H. Klenzing, C. R. Englert, B. J. Harding, T. J. Immel, and D. E. Rowland. 2021. "Evaluation of Atmospheric 3‐Day Waves as a Source of Day‐to‐Day Variation of the Ionospheric Longitudinal Structure." Geophysical Research Letters 48 (15): [10.1029/2021gl094877]

    Verkhoglyadova, O. P., C. D. Bussy‐Virat, A. Caspi, et al. D. R. Jackson, V. Kalegaev, J. Klenzing, J. Nieves‐Chinchilla, and A. Vourlidas. 2021. "Addressing Gaps in Space Weather Operations and Understanding With Small Satellites." Space Weather 19 (3): [10.1029/2020sw002566]

    Martinis, C., R. Daniell, R. Eastes, et al. J. Norrell, J. Smith, J. Klenzing, S. Solomon, and A. Burns. 2021. "Longitudinal Variation of Postsunset Plasma Depletions From the Global‐Scale Observations of the Limb and Disk (GOLD) Mission." Journal of Geophysical Research: Space Physics 126 (2): [10.1029/2020ja028510]

    Pfaff, R., M. Larsen, T. Abe, et al. H. Habu, J. Clemmons, H. Freudenreich, D. Rowland, T. Bullett, M. Yamamoto, S. Watanabe, Y. Kakinami, T. Yokoyama, J. Mabie, J. Klenzing, R. Bishop, R. Walterscheid, M. Yamamoto, Y. Yamazaki, N. Murphy, and V. Angelopoulos. 2020. "Daytime Dynamo Electrodynamics With Spiral Currents Driven by Strong Winds Revealed by Vapor Trails and Sounding Rocket Probes." Geophysical Research Letters 47 (15): [10.1029/2020gl088803]

    Klenzing, J., R. Davidson, S. Jones, et al. C. Martinis, K. Zawdie, G. Earle, J. Smith, A. Halford, S. Noel, N. Paschalidis, R. Pfaff, and E. Robertson. 2020. "The petitSat Mission – Science Goals and Instrumentation." Advances in Space Research 66 (1): 107-115 [10.1016/j.asr.2019.12.013]

    Halford, A. J., A. C. Kellerman, K. Garcia-Sage, et al. J. Klenzing, B. A. Carter, R. M. McGranaghan, T. Guild, C. Cid, C. J. Henney, N. Y. Ganushkina, A. G. Burrell, M. Terkildsen, D. T. Welling, S. A. Murray, K. Leka, J. P. McCollough, B. J. Thompson, A. Pulkkinen, S. F. Fung, S. Bingham, M. M. Bisi, M. W. Liemohn, B. M. Walsh, and S. K. Morley. 2019. "Application Usability Levels: A Framework for Tracking Project Product Progress." J. Space Weather Space Clim. 9 A34 [https://doi.org/10.1051/swsc/2019030 ]

    Burrell, A. G., A. Halford, J. Klenzing, et al. R. A. Stoneback, S. K. Morley, A. M. Annex, K. M. Laundal, A. C. Kellerman, D. Stansby, and J. Ma. 2018. "Snakes on a Spaceship—An Overview of Python in Heliophysics." Journal of Geophysical Research: Space Physics 123 (12): 2018JA025877 [10.1029/2018ja025877]

    Stoneback, R. A., A. G. Burrell, J. Klenzing, and M. D. Depew. 2018. "PYSAT: Python Satellite Data Analysis Toolkit." Journal of Geophysical Research: Space Physics 123 5271–5283 [10.1029/2018ja025297]

    Collier, M. R., D. Chornay, J. Clemmons, et al. J. Keller, J. Klenzing, J. Kujawski, J. McLain, R. Pfaff, D. Rowland, and M. Zettergren. 2015. "VISIONS remote observations of a spatially-structured filamentary source of energetic neutral atoms near the polar cap boundary during an auroral substorm." Advances in Space Research 56 (10): 2097-2105 [10.1016/j.asr.2015.08.010]

    Drob, D. P., J. T. Emmert, J. W. Meriwether, et al. J. J. Makela, E. Doornbos, M. Conde, G. Hernandez, J. Noto, K. A. Zawdie, S. E. McDonald, J. D. Huba, and J. H. Klenzing. 2015. "An update to the Horizontal Wind Model (HWM): The quiet time thermosphere." Earth and Space Science 2 (7): 301-319 [10.1002/2014ea000089]

    Kelley, M. C., F. S. Rodrigues, R. F. Pfaff, and J. Klenzing. 2014. "Observations of the generation of eastward equatorial electric fields near dawn." ANNALES GEOPHYSICAE 32 1169-1175 [10.5194/angeo-32-1169-2014]

    Klenzing, J., O. de La Beaujardiere, L. C. Gentile, et al. J. Retterer, F. S. Rodrigues, and R. A. Stoneback. 2014. "C/NOFS results and equatorial ionospheric dynamics Preface." ANNALES GEOPHYSICAE 32 1303-1303 [10.5194/angeo-32-1303-2014]

    Klenzing, J. H., A. G. Burrell, R. A. Heelis, et al. J. Huba, R. F. Pfaff, and F. Simoes. 2013. "Exploring the role of ionospheric drivers during the extreme solar minimum of 2008." Annales Geophysicae 31 2147-2156 [10.5194/angeo-31-2147-2013]

    Simoes, F., R. F. Pfaff, H. T. Freudenreich, et al. J. H. Klenzing, D. E. Rowland, K. Bromund, E. L. Kepko, G. Le, M. C. Liebrecht, S. C. Martin, and P. Uribe. 2013. "Equatorial ionosphere semiannual oscillation investigated from Schumann resonance measurements on board the C/NOFS satellite." Journal of Geophysical Research (Atmospheres) 118 12,045-12,051 [10.1002/jgrd.50797]

    Klenzing, J. H., F. Simoes, S. Ivanov, et al. D. Bilitza, R. A. Heelis, and D. E. Rowland. 2013. "Performance of the IRI-2007 model for equatorial topside ion density in the African sector for low and extremely low solar activity." Advances in Space Research 52 1780-1790 [10.1016/j.asr.2012.09.030]

    Ngwira, C., J. H. Klenzing, J. Olwendo, et al. F. M. D'ujanga, R. Stoneback, and P. Baki. 2013. "A study of intense ionospheric scintillation observed during a quiet day in the East African low latitude region." Radio Science 48 [10.1002/rds.20045]

    Haaser, R. A., R. Davidson, R. A. Heelis, et al. G. D. Earle, S. Venkatraman, and J. H. Klenzing. 2013. "Storm time meridional wind perturbations in the equatorial upper thermosphere." Journal of Geophysical Research (Space Physics) 118 2756-2764 [10.1002/jgra.50299]

    Ngwira, C. M., J. Klenzing, J. Olwendo, et al. F. M. D'ujanga, R. Stoneback, and P. Baki. 2013. "A study of intense ionospheric scintillation observed during a quiet day in the East African low-latitude region." RADIO SCIENCE 48 396-405 [10.1002/rds.20045]

    Simoes, F., R. F. Pfaff, M. Hamelin, et al. J. H. Klenzing, H. T. Freudenreich, C. Beghin, J.-J. Berthelier, K. Bromund, R. Grard, J.-P. Lebreton, S. C. Martin, D. E. Rowland, D. Sentman, Y. Takahashi, and Y. Yair. 2012. "Using Schumann Resonance measurements for constraining the water abundance on the giant planets - implications for the Solar System formation." The Astrophysical Journal 750:85 [10.1088/0004-637X/750/1/85]

    Aveiro, H. C., D. L. Hysell, R. G. Caton, et al. K. M. Groves, J. H. Klenzing, R. F. Pfaff, R. Stoneback, and R. A. Heelis. 2012. "Three-dimensional numerical simulations of equatorial spread F: Results and observations in the Pacific sector." Journal of Geophysical Research (Space Physics) 117 A03325 [10.1029/2011JA017077]

    Simoes, F., R. F. Pfaff, J.-J. Berthelier, and J. H. Klenzing. 2012. "A Review of Low Frequency Electromagnetic Wave Phenomena Related to Tropospheric-Ionospheric Coupling Mechanisms." Space Science Reviews 168 551-593 [10.1007/s11214-011-9854-0]

    Simoes, F., J. H. Klenzing, S. Ivanov, et al. R. F. Pfaff, H. T. Freudenreich, D. Bilitza, D. E. Rowland, K. Bromund, M. C. Liebrecht, S. C. Martin, P. W. Schuck, P. Uribe, and T. Yokoyama. 2012. "Detection of Ionospheric Alfven Resonator signatures in the equatorial ionosphere." Journal of Geophysical Research (Space Physics) 117 [10.1029/2012JA017709]

    Klenzing, J. H., and D. E. Rowland. 2012. "The fixed-bias Langmuir probe on the C/NOFS satellite: calibration and validation." Reviews of Scientific Instruments 83 114501 [10.1063/1.4766333]

    Haaser, R. A., G. D. Earle, R. A. Heelis, et al. J. Klenzing, R. Stoneback, W. R. Coley, and A. G. Burrell. 2012. "Characteristics of low-latitude ionospheric depletions and enhancements during solar minimum." Journal of Geophysical Research (Space Physics) 117 [10305-10.1029/2012JA017814]

    Klenzing, J. H., F. Simoes, S. Ivanov, et al. R. A. Heelis, D. Bilitza, R. Pfaff, and D. Rowland. 2011. "Topside equatorial ionospheric density and composition during and after extreme solar minimum." Journal of Geophysical Research (Space Physics) 116 [12330-10.1029/2011JA017213]

    Klenzing, J. H., D. E. Rowland, R. F. Pfaff, et al. G. Le, H. T. Freudenreich, R. A. Haaser, A. G. Burrell, R. A. Stoneback, W. R. Coley, and R. A. Heelis. 2011. "Observations of low-latitude plasma density enhancements and their associated plasma drifts." Journal of Geophysical Research (Space Physics) 116 A09324 [10.1029/2011JA016711]

    Rowland, D. E., M. R. Collier, J. B. Sigwarth, et al. S. L. Jones, J. K. Hill, R. Benson, M. Choi, D. Chornay, J. Cooper, S. Feng, N. Gill, C. Goodloe, L. Han, H. Hancock, F. Hunsaker, N. Jones, J. W. Keller, J. Klenzing, I. Kleyner, T. Moore, K. Ogilvie, R. Pfaff, T. Price, J. Roman, M. Rodruiguez, P. Rozmarynowski, M. Saulino, S. Sheikh, K. Simms, A. Yew, E. Young, J. Kujawski, M. Boudreaux, J. Casas, D. Myre, and B. Smith. 2011. "Science of opportunity: Heliophysics on the FASTSAT mission and STP-S26." 2011 Aerospace Conference [10.1109/aero.2011.5747235]

    Haaser, R. A., G. D. Earle, R. A. Heelis, W. R. Coley, and J. H. Klenzing. 2010. "Low‐latitude measurements of neutral thermospheric helium dominance near 400 km during extreme solar minimum." Journal of Geophysical Research (Space Physics) 115 A11318 [10.1029/2010JA015325]

    Davidson, R. L., G. D. Earle, J. H. Klenzing, and R. A. Heelis. 2010. "A numerical study of geometry dependent errors in velocity, temperature, and density measurements from single grid planar retarding potential analyzers." Physics of Plasmas 17 082901 [10.1063/1.3457931]

    Pfaff, R., D. Rowland, H. Freudenreich, et al. K. Bromund, G. Le, M. Acuna, J. Klenzing, C. Liebrecht, S. Martin, W. J. Burke, N. C. Maynard, D. E. Hunton, P. A. Roddy, J. O. Ballenthin, and G. R. Wilson. 2010. "Observations of DC electric fields in the low-latitude ionosphere and their variations with local time, longitude, and plasma density during extreme solar minimum." Journal of Geophysical Research (Space Physics) 115 [12324-10.1029/2010JA016023]

    Klenzing, J. H., G. D. Earle, R. A. Heelis, and W. R. Coley. 2009. "A statistical analysis of systematic errors in temperature and ram velocity estimates from satellite-borne retarding potential analyzers." Physics of Plasmas 16 052901 [10.1063/1.3125311]

    Klenzing, J. H., G. D. Earle, and R. A. Heelis. 2008. "Errors in ram velocity and temperature measurements inferred from satellite-borne retarding potential analyzers." Physics of Plasmas 15 062905 [10.1063/1.2936270]

    Earle, G. D., J. H. Klenzing, P. A. Roddy, et al. W. A. Macaulay, M. D. Perdue, and E. L. Patrick. 2007. "A new satellite-borne neutral wind instrument for thermospheric diagnostics." Review of Scientific Instruments 78 114501 [10.1063/1.2813343]

    Non-Refereed

    Klenzing, J. H., I. Seker, R. F. Pfaff, et al. D. E. Rowland, S. F. Fung, and J. D. Mathews. 2011. "Multi-instrument observations of an MSTID over Arecibo Observatory." General Assembly and Scientific Symposium; 2011 XXXth URSI; AUG 2011 1-4

                                                                                                                                                                                            
    NASA Logo, National Aeronautics and Space Administration
    • NASA Official:
    • Curator:
    • Last Updated: 03/24/2023