Journal PublicationsMathews, J. D. and D. J. Connolly, "A High Frequency Dynamic Phase Metering Instrument for Ionospheric Research," J. of Physics E: Scientific Instruments, 5, 782-84 (1972). Mathews, J. D. and R. M. Harper, "Incoherent Scatter Rada Observations of Spread-F Producing Ionospheric Structures at Arecibo," J. Atmos.Terr. Phys., 34, 1119-27 (1972). Mathews, J. D., J. H. Shapiro and B. S. Tanenbaum, "Evidence for Distributed Scattering in D-Region Partial-Reflection Processes," J. Geophys. Res., 78, 8266-75 (1973). Mathews, J. D. and B. S. Tanenbaum, "Loop Structuring of Ionogram Traces," J. Atmos. Terr. Phys., 35, 775-783 (1973). Rowe, J. F., Jr. and J. D. Mathews, "Low-Latitude Nighttime E-Region Conductivities," J. Geophys. Res., 78, 7461-70 (1973). Mathews, J. D., "Measurements of the Diurnal Tides in the 80-100 km Altitude Range at Arecibo," J. Geophys.Res., 81, 4671-77 (1976). Mathews, J. D. , "The Effect of Negative Ions on Collision Dominated Thomson Scattering," J. Geophys. Res., 81, 505-512 (1978). Mathews, J. D. and F. S. Bekeny, "The Effect of Negative Ions on Thomson Scattering in the Presence of Electron Heating," Geophys. Res. Lett., 5, 925-927 (1978). Tepley, C. A. and J. D. Mathews, "Preliminary Measurements of Ion-Neutral Collision Frequencies and Mean Temperatures in the Arecibo 80-100 km Altitude Region," J. Geophys. Res., 81, 3299-3302 (1978). Ganguly, S., J. D. Mathews and C. A. Tepley, "Thomson Scatter Radar Detection of D-Region Negative Ions at Arecibo," Geophys. Res. Lett., 6, 89-92 (1979). Mathews, J. D., and F. S. Bekeny, "Upper Atmospheric Tides and the Vertical Motion of Ionospheric Sporadic Layers at Arecibo," J. Geophys. Res., 84, 2743-50 (1979). Mathews, J. D., "D-Region Research at Arecibo," J. Atmos. Terr. Phys., 43, 549-556 (1981). Mathews, J. D., M. P. Sulzer, C. A. Tepley, R. Bernard, J. L. Fellous, M. Glass, M. Massebeauf, S. Ganguly, R. M. Harper, R. A. Behnke and J. C. G. Walker, "A Comparison Between Thomson Scatter and Meteor Radar Wind Measurements in the 65-105 km Altitude Region at Arecibo," Planet. Space Sci., 29, 341-348 (1981). Mathews, J. D. and B. S. Tanenbaum, "A Plasma Wave and Electron-Plasma Diffusion Interpretation of Thomson Scattering from a Plasma Containing Negative Ions," Planet, Space Sci., 29, 335-340 (1981). Tepley, C. A., J. D. Mathews and S. Ganguly, "Incoherent Scatter Radar Studies of Mesospheric Temperatures and Collision Frequencies at Arecibo," J. Geophys. Res., 86, 11330-34 (1981). Tepley, C. A., J. D. Mathews, J. W. Meriwether, Jr. and J. C. G. Walker, "Observations of the Ca+ Twilight Airglow from Intermediate E-Layer Over Arecibo," J. Geophys. Res., 86, 7781-86 (1981). Tepley, C. A., J. W. Meriwether, Jr., J. C. G. Walker and J. D. Mathews, "Observations of Neutral Iron Emission in Twilight Spectra," J. Geophys. Res., 86, 4831-4835 (1981). Breakall, J. K. and J. D. Mathews, "A Theoretical and Experimental Investigation of Antenna Near-Field Effects as Applied to Incoherent Backscatter Measurements Arecibo," J. Atmos. Terr. Phys., 44, 449-454 (1982). Mathews, J. D., J. K. Breakall and S. Ganguly, "The Measurement of Diurnal Variations of Electron Concentration in the 60 km - 100 km Ionosphere at Arecibo," J. Atmos. Terr. Phys., 44, 441-448 (1982). Sulzer, M. P., J. D. Mathews and A. A. Tomko, "A UHF Cross-Modulation D-Region Heating Experiment with Aeronomic Implications," Radio Science, 17, 435-443 (1982). Min, W., B. S. Tanenbaum and J. D. Mathews, "Diffusion of a Multi-component Plasma," Planet, Space Sci., 31, 591-596 (1983). Mathews, J. D., "Incoherent Scatter Radar Studies of the Mesosphere," Chapt. 11 Middle Atmosphere Program (MAP) Handbook, 13, R.A. Vincent, ed. (1984)(invited). Mathews, J. D., "The Incoherent Scatter Radar as a Tool for Studying the Ionosphere D-Region," J. Atmos. Terr. Phys., 46, 975-986 (1984). Mathews, J. D., J. K. Breakall and G. K. Karawas, "The Discrete Prolate Spheroidal Filter as a Digital Signal Processing Tool," IEEE Trans. on Acoustics, Speech and Signal Processing, ASSP-33, 1471-78 (1985). Tepley, C. A. and J. D. Mathews, "Incoherent Scatter Radar Determination of the Temperature and Composition of a Nighttime 92 km Sporadic Layer at Arecibo," J. Geophys. Res., 90, 517-3519 (1985). German, M. J. and J. D. Mathews, "Interference Detection and Correction Applied to Incoherent Scatter Radio Power Profile Measurements," Radio Science, 21, 745-751 (1986). Mathews, J. D., "Incoherent Scatter Radar Probing of the 60-100 km Atmosphere and Ionosphere," IEEE Trans. Geosci. Remote Sensing, GE-24, 765-776 (1986). Mathews, J. D., "Some Aspects of Metallic Ion Chemistry and Dynamics in the Mesosphere and Thermosphere," First GLOBMET Symposium issue, MAP Handbook, 25, 228-254 (1987)(invited). Ying, W.-P., J. D. Mathews and P. K. Rastogi, "Interference Detection and Correction Applied to D Region Incoherent Scatter Radar Power Spectral Measurements," Radio Science, 22, 307-312 (1987). Mathews, J. D., J. K. Breakall and M. P. Sulzer, "The Moon as a Calibration Target of Convenience for VHF-UHF Radar Systems," Radio Science, 23, 1-12 (1988). Rastogi, P. K., J. D. Mathews, W.-P. Ying and J. Ršttger, "Simultaneous VHF and UHF Radar Observations of the Mesosphere at Arecibo During a Solar Flare: A Check on the Gradient-Mixing Hypothesis," Radio Science, 23, 97-105 (1988). Tong, Yu, J. D. Mathews and W.-P. Ying, "An Upper E Region Quarterdiurnal Tide at Arecibo?" J. Geophys. Res., 93, 10047-51 (1988). Mathews, J. D., C. L. McCart, E. H. Klevans, R. A. Walker, R. Fisher, K. S. Kunz andJ. A. Brighton, "An Artist-in-Residence Program in the Pennsylvania State University College of Engineering," Leonardo, 23, No. 2/3, 227-230 (1990). Kane, T. J., C. S. Gardner, Q. Zhou, J. D. Mathews and C. A. Tepley, "Lidar, Radar and Airglow Observations of a Prominent Sporadic Na/Sporadic E Layer Event at Arecibo during AIDA-89," special AIDA issue of the J. Atmos. Terr. Phys., 55, No. 3, 499-511 (1993). Mathews, J. D., Y. T. Morton and Q. Zhou, "Observations of Ion Layer Motions During the AIDA Campaign," special AIDA issue of the J. Atmos. Terr. Phys., 55, No. 3, 447-457 (1993). Mathews, J. D., Q. Zhou, C. R. Philbrick, Y. T. Morton and C. S. Gardner, "Observations of Ion and Sodium Layer Coupled Processes During AIDA," special AIDA issue of the J. Atmos. Terr. Phys., 55, No. 3, 487-498 (1993). Morton, Y. T. and J. D. Mathews, "Effects of the 13-14 March 1989 Geomagnetic Storm on the E Region Tidal Ion Layer Structure at Arecibo during AIDA," special AIDA issue of the J. Atmos. Terr. Phys., 55, No. 3, 467-485 (1993). Morton, Y. T., J. D. Mathews and Q. Zhou, "Further Evidence for a 6-h Tide above Arecibo," special AIDA issue of the J. Atmos. Terr. Phys., 55, No. 3, 459-465 (1993). Zhou, Q., J. D. Mathews and C. A. Tepley, "A Proposed Temperature DependentMechanism for the Formation of Sporadic Sodium Layers," special AIDA issue of the J. Atmos. Terr. Phys., 55, No. 3, 513-521 (1993). Mathews, John D. and C. Garoian, "Earthview: Looking Down at Ourselves," Leonardo Electronic News, 3, No. 7, (1993) also Leonardo 27, No. 3 (1994). Mathews, J. D. and Y. T. Morton, "Radar Measurements of Dynamics and Layering Processes in the 80-150 km Region at Arecibo," Advances in Space Research 14, No. 9, 153-169 (1994)(invited). Zhou, Q. and J. D. Mathews, "A Spectral Technique for the Detection and Correction of Coherent Interference Effects on Radar Power Profiles" Radio Science, 29, 5, 1173-1177 (1994). Meisel, D. D., V. S. Getman, J. D. Mathews, S. C. Jacobs and R. G. Roper, "Bolide AIDA: Death of an Aubrite Meteoroid," Icarus, 116, 227-254 (1995) Zhou, Q. and J. D. Mathews, "Generation of Sporadic Sodium Layers via Turbulent Heating of the Atmosphere?" J. Atmos. Terr. Phys., 57, 11, 1309-1319 (1995). Garoian, C. R. and J. D. Mathews, "A Common Impulse in Art and Science" Leonardo, 29, No. 3, 193 (1996). Mathews, J. D., "The Dynamics of Ion Layer Generation in the 80-150 km Altitude Region," J. Atmos. Terr. Phys., 58, 673-682 (1996)(invited). Mathews, J. D., M. P. Sulzer, and P. Perillat, “Aspects of layer electrodynamics inferred from high-resolution ISR observations of the 80-270 km ionosphere,” Geophys. Res. Lett., 24, 1411-1414 (1997). Mathews, J. D., D. D. Meisel, K. P. Hunter, V. S. Getman, and Q. Zhou, “Very high resolution studies of micrometeors using the Arecibo 430 MHz radar,” Icarus, 126, 157-169 (1997). Zhou, Q.-H., P. Perillat, J. Y. N. Cho, and J. D. Mathews, “Simultaneous meteor echo observations by large aperature VHF and UHF radars,” Radio Sci., 33, 1641-1654 (1998). Mathews, J. D., “Sporadic E: Current views and recent progress,” J. Atmos. Solar-Terr. Phys., 60#4, 413-435 (1998). Mathews, J. D., D. D. Meisel, D. Janches, V. S. Getman, and Q.-H. Zhou, “Direct Doppler and scattering mechanism studies of meteor head-echoes using the Arecibo 50/430 MHz radars,” Proceedings of METEOROIDS 1998, Tatranska Lomnica, Slovakia, 17-21 August, 1998, published by Astronomical Institute, Slovak Academy of Sciences, edited by W. J. Baggaley and V. Porubcan, 79-82 (1999). Mathews, J. D., D. D. Meisel, D. Janches, V. S. Getman, and Q.-H. Zhou, “Possible origins of low inclination antapex micrometeors observed using the Arecibo UHF radar,” Proceedings of METEOROIDS 1998, Tatranska Lomnica, Slovakia, 17-21 August, 1998, published by Astronomical Institute, Slovak Academy of Sciences, edited by W. J. Baggaley and V. Porubcan, 79-82 (1999). Zhou, Q.-H., Q.-N. Zhou, J. D. Mathews, “Arthmetic average, geometric average, and ranking: Application to incoherent scatter radar data processing,” Radio Science, 34, 1227-1237 (1999). Zhou, Q.-H., J. D. Mathews, and Q.-N. Zhou, Incoherent scatter radar study of the impact of the meteoric influx on nocturnal E-region ionization, Geophys. Res. Lett., 26, 1833-1836 (1999). Janches, D., J. D. Mathews, D. D. Meisel, and Q.-H. Zhou, “Micrometeor observations using the Arecibo 430 MHz radar: I. Determination of the ballistic parameter from observed Doppler velocity and deceleration results,” Icarus, 145, 53-63 (2000). Janches, D., J. D. Mathews, D. D. Meisel, V. S. Getman, and Q.-H. Zhou, “Doppler studies of near-antapex UHF radar meteors,” Icarus, 143, 347-353 (2000). Mathews, J.D., S. Gonzalez, M.P. Sulzer, Q.-H. Zhou, J. Urbina, E. Kudeki, and S. Franke, “Kilometer-scale layered structures inside spread-F,” Geophys. Res. Lett., 28, 4167-4170 (2001). Mathews, J. D., D. Janches, Meisel, D. D., Q.-H. Zhou, “The micrometeoroid mass flux into the upper atmosphere: Arecibo results and a comparison with prior estimates,” Geophys. Res. Lett., 28, 1929-1932 (2001). Machuga, D. W., and J. D. Mathews, “Numerical simulations of three-dimensional E-region ion trajectories in realistic tidal wind and E-field structures: Layer formation and transport,” J. Atmos. Solar-Terr. Phys., 63, 1519-1528 (2001). Mathews, J. D., D. W. Machuga, and Q.-H. Zhou, “Observational evidence for electrodynamic linkages between spread-F, ion rain, the intermediate layer, and sporadic-E: Results from observations and simulations,” J. Atmos. Solar-Terr. Phys., 63, 1529-1543 (2001). Zhou, Q.-H., J. D. Mathews, T. Nakamura, “Implications of meteor observations by the MU radar,” Geophys. Res. Lett., 28, 1399-1402 (2001). Zhou, Q.-H., and J.D. Mathews, Comments on "Modelling the peak of the ionospheric E-layer" by J. E. Titheridge, J. Atmos. Solar-Terr. Phys., 63, 627-629 (2001). Janches, D., D. D. Meisel, and J. D. Mathews, “Orbital properties of the Arecibo micrometeoroids at Earth intersection,” Icarus, 150, 206-218 (2001). Meisel, D. D., D. Janches, and J. D. Mathews, “The size distribution of Arecibo interstellar particles and its implications,” Astrophys. J., 579, 895-904 (2002). Pasko, V.P., M.A. Stanley, J.D. Mathews, U.S. Inan, and T.G. Wood, Electrical discharge from a thundercloud top to the lower ionosphere, Nature, 416, 152-154 (2002). Janches, D., D. D. Meisel, and J. D. Mathews, “Dynamical and orbital properties of the Arecibo micrometeors,” Proceedings of IAU Colloquium181/COSPAR Colloquium 11—Dust in the solar system and other planetary systems, Canterbury UK, 10-14 April 2000 (2002). Mathews, J. D., D. Janches, and D. D. Meisel, “Direct determination of the micrometeoric mass flux into the upper atmosphere,” Proceedings of IAU Colloquium181/COSPAR Colloquium 11—Dust in the solar system and other planetary systems, Canterbury UK, 10-14 April 2000 (2002). Meisel, D. D., D. Janches, and J. D. Mathews, “Extrasolar micrometeors radiating from the vicinity of the local interstellar bubble,” Astrophys. J., 567, 323-341 (2002). Mathews, J.D., Radio science issues surrounding HF/VHF/UHF radar meteor studies, J. Atmos. Solar-Terr. Phys., 66#3, 285-299 (2004). Mathews, J.D., J.F. Doherty, C.-H. Wen, D. Janches, and D.D. Meisel, An update on UHF radar meteor observations and associated signal processing techniques at Arecibo Observatory, J. Atmos. Solar-Terr. Phys., 65, 1139-1149 (2003). Janches, D., M.C. Nolan, D.D. Meisel, J.D. Mathews, Q.-H. Zhou, and D.E. Moser, On the geocentric micrometeor velocity distribution, J. Geophys. Res., 108, SIA 1-1 - 1-14, (2003). Djuth, F.T., M.P. Sulzer, S.A. Gonzales, J.D. Mathews, J.H. Elder, and R.L. Walterscheid, A continuum of gravity waves in the Arecibo thermosphere?, Geophys. Res. Lett., 31, L16801 (2004). Zhou, Q.-H., Y.T. Morton, J.D. Mathews, and D. Janches, Aspect sensitivity of VHF echoes from field aligned irregularities in meteor trails and thin ionization layers, Atmos. Chem. Physics, 4, 685-692 (2004). Raizada, S., C.A. Tepley, D. Janches, J.S. Friedman, Q. Zhou, and J.D. Mathews, Lidar observations of Ca and K metallic layers from Arecibo and comparison with micrometeor sporadic activity, J. Atmos. Solar-Terr. Phys., 66, 595-606 (2004). Wen, C.-H., J.F. Doherty, J.D. Mathews, and D. Janches, Time-frequency radar processing for meteor detection, IEEE Trans. Geos. Remote Sens., 42 (3), 501-510 (2004). Wen, C.-H., J.F. Doherty, and J.D. Mathews, Adaptive filtering for the separation of incoherent scatter and meteor signals for Arecibo observational data, J. Atmos. Solar-Terr. Phys., in press (2005). Zhou, Q.-N., J.D. Mathews, Q. Du, and C.A. Miller, A preliminary investigation of the pseudo-spectral method numerical solution of the Perkins instability equations in the homogeneous case., J. Atmos. Solar-Terr. Phys., 67, 325-335 (2005). Wen, C.-H., J.F. Doherty, J.D. Mathews, and D. Janches, Meteor detection and non-periodic bursty interference removal for Arecibo data, J. Atmos. Solar-Terr. Phys., 67, 275-281 (2005). Non-Refereed Papers, Meeting PresentationsMeriwether, J. M., Jr., D. P. Sipler, M. A. Biondi and J. D. Mathews, "Observations of the Mesosphere Temperature Over Arecibo from Airglow and Incoherent Scatter Measurements," presented at the Fall American Geophysical Union Meeting, San Fransisco (December 1977). Mathews, J. D. and S. Ganguly, "Observations of Negative Ions in the Mesosphere," presented at the Fall American Geophysical Union Meeting, San Fransisco (December 1978). Tepley, C. A., J. D. Mathews, R. G. Burnside and J. W. Meriwether, Jr., "Horizontal Thermal Structure of the Mesosphere," presented at the Spring American Geophysical Union Meeting, Toronto (1980). Mathews, J. D., M. P. Sulzer, C. A. Tepley, R. Bernard, J. L. Fellous, M. Glass, M. Massebeauf, S. Ganguly, R. M. Harper, R. A. Behnke and J. C. G. Walker, "A Comparison Between Thomson Scatter and Meteor Radar," presented at the 6th International Symposium on Equatorial Aeronomy, Aquadilla, Puerto Rico (1980). Tepley, C. A., J. D. Mathews and S. Ganguly, "Ion-neutral Collision Frequencies and Temperatures Derived from Incoherent Scatter Radar Observations of the Lower Ionosphere," paper presented at the 4th Scientific Assembly of the International Association of Geomagnetism and Aeronomy (IAGA), Edinburgh, Scotland (August 1981). Rastogi, P. K. and J. D. Mathews, "Usefulness of Multifrequency MST Radar Measurements" paper presented at the URSI/SCOSTEP Workshop on Technical Aspects of MST Radar, University of Illinois, Urbana, (May 1984). Rastogi, P. K., J. D. Mathews and J. Ršttger, "Simultaneous D Region VHF Observations at Arecibo during a Solar Flare: A Check on the Gradient Mixing Hypothesis," paper presented at the URSI/SCOSTEP Workshop on MST Radars, Aguadilla, Puerto Rico (October 1985). Ying, W. P., J. D. Mathews and P. K. Rastogi, "Interference Detection and Correction Applied to Incoherent Scatter Radar Power Spectrum Measurements", paper presented at the URSI/SCOSTEP Workshop on MST Radars, Aquadilla, Puerto Rico (October 1985). Breakall, J. K., J. D. Mathews and M. P. Sulzer, "The Moon as a Calibration Target of Convenience for VHF-UHF Radar Systems," paper given at the URSI National Radio Science Meeting, Boulder, Co. (13-16 January 1986). Ying, W.-p. and J. D. Mathews, "Observations of the Tidal Motions in the 80 to 150 km Altitude Region at Arecibo," paper presented at the Spring American Geophysical Union Meeting, Baltimore, Md. (13-19 May 1986). Ying, W.-p., J. D. Mathews and C. A. Tepley, "Thermal Structure Near the 85 km Mesopause Region Inferred from OH(8-3) and OH(5-1) Rotational Band Emissions," paper presented at the Spring American Geophysical Union Meeting, Baltimore, Md. (13-19 May 1986). Beatty, T. J., R. E. Bills, C. A. Hostetler, C. S. Gardner, Q. Zhou, J. D. Mathews and C. R. Philbrick, "Lidar and Radar Observations of Sporadic E and Sporadic Na Layers at Arecibo," Contributed Paper, Spring American Geophysical Union Meeting, Baltimore, Md. (29 May-1 June 1990). Chang, S. S., Y. C. Rau, J. D. Mathews, C. R. Philbrick, C. S. Gardner and T. J. Beatty, "Latitudinal Variations of Middle Atmospheric Structure for Winter and Spring Seasons," Poster Paper, Spring American Geophysical Union Meeting, Baltimore, Md. (29 May-1 June 1990). Mathews, J. D., C. R. Philbrick, Q. Zhou, C. S. Gardner and T. J. Beatty, "Simultaneous Observations of Narrow Sodium and Narrow Ionization Layers Using Both Lidar and Incoherent Scatter Radar Techniques at Arecibo during AIDA," Contributed Paper, Spring American Geophysical Union Meeting, Baltimore, Md. (29 May-1 June 1990). Morton, Y. T., J. D. Mathews and Q. Zhou, "Tides and Acoustic-Gravity Waves as Observed in the Motions of Ionospheric E Region Meteoric Ion Layers During AIDA," Poster Paper, Spring American Geophysical Union Meeting, Baltimore, Md. (29 May-1 June 1990). Rau, Y. C., J. E. Mancusi, J. D. Mathews, C. R. Philbrick, C. S. Gardner and T. J. Beatty, "Seasonal Variation of Middle Atmosphere Gravity Wave Activity Over Arecibo During the AIDA Campaign," Poster Paper, Spring American Geophysical Union Meeting, Baltimore, Md. (29 May-1 June 1990). Morton, Y. T., Q. Zhou and J. D. Mathews, "Tides and Gravity Waves in the Formation and Motion of E-Region Ion Layers," Poster Paper, CEDAR 1990 Meeting, Boulder, Co. (June 1990). Rau, Y. C., J. D. Mathews, C. R. Philbrick, T. J. Beatty, R. E. Bills and C. S. Gardner, "Gravity Wave Activity Variation over Arecibo during the AIDA Campaign," Poster Paper, CEDAR 1990 Meeting, Boulder, Co. (June 1990). Zhou, Q., Y. T. Morton, J. D. Mathews, C. R. Philbrick, T. J. Beatty and C. S. Gardner, "Correlation Study of Sodium and Electron Concentrations above Arecibo," Poster Paper, CEDAR 1990 Meeting, Boulder, Co. (June 1990). Mathews, J. D., "Catching a Meteor in the Act," Sky and Telescope, 30, No. 5, 468-469, (November 1990) (News article with two figures). Morton, Y. T., J. D. Mathews and Q. Zhou, "Electron Concentration Configurations During the March 13-14, 1989 Geomagnetic Storm as Measured by Arecibo Incoherent Scatter Radar," Spring American Geophysical Union Meeting, Baltimore, Md. (28 May-1 June 1991). Zhou, Q. and J. D. Mathews, "Detection and Correction of Coherent Interference in Incoherent Scatter Radar Data Processing," Spring American Geophysical Union Meeting, Baltimore, Md. (28 May-1 June 1991). Zhou, Q., J. D. Mathews and C. S. Gardner, "The Roles of Tides and Gravity Waves on the Formation of Sporadic Sodium Events Based on the Simultaneous Lidar/Radar Observations during the AIDA Campaign," European Geophysical Society Meeting, Edinburgh, Scotland (6-11 April 1992). Hunter, K. P., J. Yu, J. D. Mathews and T. J. Kane, "Some Properties of the 5-6 April 1989 Wave Event Observed During AIDA," Poster Paper, CEDAR 1993 Meeting, Boulder, Co. (June 1993). Kane, T. J., J. D. Mathews, K. P. Hunter, D. W. Machuga and J. Yu, "Comparison of Narrow Sodium Layer Results from AIDA-89 and ALOHA-90," 30th Committee on Space Research (COSPAR) Scientific Assembly, Scientific Commission C, Hamburg, Germany (11-21 July 1994). Meisel, D. D., V. S. Getman, J. D. Mathews, Y. T. Morton, Q. Zhou, R. G. Roper, and B. G. Marsden, "An Unusual Bolide with a Near-Earth Orbit," abstract in Bulletin of the American Astronomical Society, 26, 3, 1164, Washington, DC (1994). Mathews, J. D., M. P. Sulzer, and P. Perillat, “High resolution ISR studies of layers and waves in the 80-200 km altitude region above Arecibo,” AGU 1994 Fall Meeting, San Francisco CA (Dec. 5-9, 1994). Machuga, D. W., T. J. Kane, T. F. Wheeler, C. L. Croskey, J. D. Mathews, and J. D. Mitchell, “The CSSL (Combined Sporadic Structures and Layers) Payload: In situ Observations of Mesospheric Sodium and Related Parameters,” 13th ESA Symposium on European Rocket and Balloon Programmes and Related Research, Oland, Sweden (May 26-29, 1997). Zhou, Q.-H., P. Perillat, J. Y. N. Cho, and J. D. Mathews, “Simultaneous meteor observations by power UHF and VHF radars,” 1997 IEEE AP-S International Symposium and URSI Radio Science Meeting, Montreal, Canada (July 1997). Meisel, D. D., T. S. Allen, V. S. Getman, J. D. Mathews, and Q. Zhou, “Dynamical studies of micrometeors detected at the Arecibo Observatory,” 29th Annual Meeting of the Division of Planetary Studies of the American Astronomical Society, Cambridge, Mass. (28 July-1 August, 1997). Mathews, J. D., D. W. Machuga, Q. Zhou, and G. D. Earle, “Spread-F, ion rain, and the intermediate layer,” URSI National Radio Science Meeting, Boulder, CO (5-9 January 1998). Mathews, J. D., D. D. Meisel, D. Janches, V. S. Getman, and Q.-H. Zhou, “Direct Doppler and scattering mechanism studies of metero head-echoes using the Arecibo 50/430 MHz radars,” contributed, Meteoroids 1998, Tatranska Lomnica, Slovakia (17-21 August 1998). Mathews, J. D., D. D. Meisel, D. Janches, V. S. Getman, and Q.-H. Zhou, “Possible origins of low inclination antapex micrometeors observed using the Arecibo UHF radar,” contributed, Meteoroids 1998, Tatranska Lomnica, Slovakia (17-21 August 1998). Zhou, Q.-H., J. D. Mathews, and Q.-N. Zhou, “Incoherent scatter radar study of the impact of meteoric flux on E-region ionization,” contributed paper, URSI National Radio Science Meeting, Boulder, CO (4-8 January 1999). Zhou, Q.-N., J. D. Mathews, and Q.-H. Zhou, “F-region tilt observed over Arecibo,” poster paper CEDAR-99, Boulder, CO (13-18 June 1999). Mathews, J. D., D. Janches, Q.-N. Zhou, and Q.-H. Zhou, “Meteoric deposition of metals and subsequent transport of metal ions in the E-region,” contributed paper, CEDAR-99, Boulder, CO (13-18 June 1999). Janches, D., J. D. Mathews, D. D. Meisel, and Q.-H. Zhou, “Highlights of radar meteor science at Arecibo,” paper CEDAR-99, Boulder, CO (13-18 June, 1999). Meisel, D. D., D. Janches, and J. D. Mathews, “Interstellar Particles Detected with the Arecibo 430 MHz Radar,” paper contributed, Asteroids, Comets, and Meteors, Cornell (26-30 July, 1999). Mathews, J. D., D. Janches, D. D. Meisel, and Q.-H. Zhou, “Radar Micrometeors: Physical Processes and the Radar Scattering Mechanism,” paper contributed, Asteroids, Comets, and Meteors, Cornell (26-30 July, 1999). Mathews, J. D., D. Janches, D. D. Meisel, and Q.-H. Zhou, “An Overview of Radar Micrometeor Observations at Arecibo Observatory,” paper contributed, Asteroids, Comets, and Meteors, Cornell (26-30 July, 1999). Janches, D., J. D. Mathews, D. D. Meisel, and Q.-H. Zhou, “Radar Micrometeors: II. Details on the determination of meteor sizes and masses derived by comparing numerical modeling and experimental data,” paper contributed, Asteroids, Comets, and Meteors, Cornell (26-30 July 1999). Janches, D., J. D. Mathews, D. D. Meisel, and Q.-H. Zhou, “Radar micrometeors: I. Overview of the Doppler velocity and deceleration results from Arecibo,” paper contributed, Asteroids, Comets, and Meteors, Cornell (26-30 July 1999). Mathews, J. D., Q.-H. Zhou, D. Janches, and D. D. Meisel, “Direct Determination of the Meteoric Mass Flux into the Upper Atmosphere,” paper Contributed, URSI National Radio Science Meeting, Boulder, CO (5-8 January 2000). Mathews, J. D., D. Janches, D. D. Meisel, and Q.-H. Zhou, “Arecibo radar studies of micrometeors: Zodiacal and interstellar dust in the solar system and the atmospheric fate of this dust,” paper contributed, Eighth Workshop on the Physics of Dusty Plasmas, Santa Fe (26-28 April, 2000). Mathews, J. D., D. Janches, and D. D. Meisel, “Direct determination of the micrometeoric mass flux into the upper atmosphere,” paper 8.43, contributed, IAU Colloquium181/COSPAR Colloquium 11—Dust in the solar system and other planetary systems, Canterbury UK (10-14 April, 2000). Janches, D., D. D. Meisel, and J. D. Mathews, “Dynamical and orbital properties of the Arecibo micrometeors,” paper 1.2, contributed, IAU Colloquium181/COSPAR Colloquium 11—Dust in the solar system and other planetary systems, Canterbury UK (10-14 April, 2000). Janches, D., J. D. Mathews, and D. D. Meisel, “A study of the Arecibo micrometeor entry kinetics in the upper atmosphere,” paper Poster, CEDAR 2000, Boulder, CO (25-30 June 2000). Zhou, Q.-H., J. D. Mathews, “ Implications of meteor observations by the MU radar,” paper contributed, URSI US National Meeting, Boulder CO (8-11 January 2001). Mathews, J. D., Q.-N. Zhou, and Q.-H. Zhou, “Arecibo ISR observations of horizontally-narrow, vertically-extended ionization sheets,” paper contributed, URSI US National Meeting, Boulder CO (8-11 January 2001). Briczinski, S., D. Janches, and J.D. Mathews, Observed meteor altitude distribution and subsequent meteoric mass deposition in the upper atmosphere, CEDAR Workshop, Longmont CO, contributed poster, 17-22 June (2001). Zhou, Q.-N., and J.D. Mathews, ISR observations and simulations of the midnight collapse and related structures at Arecibo, CEDAR Workshop, Longmont CO, contributed poster, 17-22 June (2001). Mathews, J. D., D. Janches, D. D. Meisel, and Q.-H. Zhou, “Updated micrometeoroid mass flux results from Arecibo meteor observations,” paper PSA-32, contributed, Meteoroids 2001, Kiruna, Sweden (6-10 August, 2001). Meisel, D. D., D. Janches, and J. D. Mathews, “The size distribution of Arecibo ISPs and its implications,” paper 11.7, contributed, Meteoroids 2001, Kiruna, Sweden (6-10 August, 2001). Zhou, Q.-H., T. Nakamura, and J. D. Mathews, “Observations of field-aligned irregularities in meteor trails usign the MU radar,” paper 7.3, contributed, Meteoroids 2001, Kiruna, Sweden (6-10 August, 2001). Mathews, J. D., M. A. Stanley, V. P. Pasko, T. G. Wood, U. S. Inan, M. J. Heavner, “Electromagnetic signatures of the Puerto Rico blue jet and its parent thunderstorm,” American Geophysical Union 2002 Fall Meeting, San Francisco, California, EOS, 83, N 47, p. F91 (6-10 December 2001). Mathews, J. D., Radio science issues surrounding HF/VHF/UHF radar meteor studies, contributed paper URSI National Meeting, Boulder CO, 9-12 Jan (2002). Pasko, V. P., J. Mathews, M. Stanley, U. Inan, T. Wood, S. Gonzalez, Q. Zhou, M. Sulzer, and C. Tepley, “Studies of lightning and lightning induced ionospheric effects at Arecibo Observatory,” 2002 URSI National Radio Science Meeting, Program and Abstracts, p. 291, Boulder, Colorado, January 9-12 (2002). Briczinski, S., and J.D. Mathews, Development of a meteor interferometer for the 430 MHz Arecibo Observatory radar, CEDAR Workshop, Longmont, CO, contributed poster, 17-21 June (2002). Wen, C.-H., J.F. Doherty, and J.D. Mathews, Signal processing for meteor detection from Arecibo Observatory data, CEDAR Workshop, Longmont, CO, contributed poster, 17-21 June (2002). Zhou, Q.-N., J.D. Mathews, Q. Du, and C. A. Miller, A preliminary numerical investigation of the Perkins instability, CEDAR Workshop, Longmont, CO, contributed poster, 17-21 June (2002). Janches, D., D.O. ReVelle, J.D. Mathews, and D.D. Meisel, Observational and theoretical evidence of catastrophic disintegration of micrometeors: A new mechanism of meteoric mass deposition into the upper atmosphere, Asteroids, Comets, & Meteors, Berlin, Germany, contributed, 4-40 poster (29 July—2 August 2002). Janches, D., Q.-H. Zhou, D.D. Meisel, D.E. Moser, and J.D. Mathews, Monitoring the yearly sporadic micrometeor flux into the upper atmosphere using the Arecibo dual-beam 430 MHz radar: First results, Asteroids, Comets, & Meteors, Berlin, Germany, contributed, 4-39 oral/poster, 29 July – 2 August (2002). Mathews, J.D., J. Doherty, C.-H. Wen, D. Janches, and D.D. Meisel, Meteor science issues addressed via UHF radar meteor observations at Arecibo Observatory, Asteroids, Comets, & Meteors, Berlin, Germany, contributed poster, 4-23, 29 July – 2 August (2002). Moser, D.E., D. Janches, D.D. Meisel, M.C. Nolan, B.D. Barlett, and J.D. Mathews, Monitoring the yearly sporadic micrometeor flux into the upper atmosphere using the Arecibo dual-beam 430 MHz radar, American Astronomical Society Meeting 201, Seattle WA, Contributed paper (5-9 January, 2003). Mathews, J.D., D. Janches, D.D. Meisel, and Q.-H. Zhou, The atmospheric fate of 0.5-100 micron dust observed as radar micrometeors at Arecibo Observatory, Astrophysics of Dust, Estes Park CO, Poster, P2.19 (26-30 May, 2003). Meisel, D.D., D. Janches, and J.D. Mathews, Nearby stars as sources of Arecibo radar detected interstellar dust particles, Astrophysics of Dust, Estes Park CO, Poster, P2.18 (26-30 May, 2003). Briczinski, S.J., J.D. Mathews, C.-H. Wen, and J.F. Doherty, Observations of sporadic meteor events using the 430 MHz Arecibo Observatory radar, CEDAR Workshop, Longmont CO, poster (2003). Janches, D., D.D. Meisel, M.C. Nolan, B.D. Bartlett, J.D. Mathews, Q.-H. Zhou, and D.E. Moser, Orbital properties of micron-size dust determined using the Arecibo 430 MHz dual-beam radar, Astrophysics of Dust, Estes Park CO, Poster, P2.17 (26-30 May, 2003). Pasko, V., S. Cummer, M. Stanley, J.D. Mathews, U. Inan, T. Wood, E. Williams, R. Boldi, M. Sato, and Y. Takahashi, Sprites produced by positive and negative lightning discharges above Haiti/Dominican Republic thunderstorms, IEEE/APS/URSI North American Radio Science Meeting, Columbus OH, Contributed, 122.2 (22-27 June 2003). Zhou, Q.-N., J.D. Mathews, Q. Du, and C.A. Miller, A preliminary investigation of the pseudo-spectral numerical solution of the Perkins instability equations, IEEE/APS/URSI North American Radio Science Meeting, Columbus, OH, contributed, 98-2 (22-27 June 2003). Janches, D., M.C. Nolan, J.D. Mathews, and D.D. Meisel, A semi-annual study of the micrometeor influx in the mesopause, 2003 American Geophysical Union Fall Meeting, San Francisco, contributed poster, SA41C-06 (8-12 December, 2003). Raizada, S., C.A. Tepley, D. Janches, J.S. Friedman, Q. Zhou, and J.D. Mathews, Simultaneous observations of neutral Ca and K metallic layers from Arecibo and the possible influence of micrometeoroids on sporadic layers, 2003 American Geophysical Union Fall Meeting, San Francisco, contributed poster, SA41C-07 (8-12 December 2003). Briczinski, S.J., and J.D. Mathews, The application of an automated searching routine to sporadic meteor observations, URSI National Radio Science Meeting, Boulder CO, Contributed Presentation, G/H2-3 (5-8 January, 2004). Janches, D., M.C. Nolan, J.L. Chau, R.F. Woodman, J.D. Mathews, and D.D. Meisel, Micrometeor observations with the Arecibo and Jicamarca radars, URSI National Radio Science Meeting, Boulder CO, contributed presentation, G/H2-5 (5-8 January, 2004). Meisel, D.D., B.D. Bartlett, J.D. Mathews, D. Janches, and S. Briczinski, Why are hyperbolic micrometeoroids no longer detected with the Arecibo UHF radar? 204th American Astronomical Society Meeting, Denver CO, contributed, 64.03 (30 May - 3 June, 2004). Wen, C.-H., J.F. Doherty, and J.D. Mathews, On the search of hyper-speed meteors, in CEDAR Workshop, Santa Fe, NM (27 June - 2 July, 2004). Briczinski, S.J., J.D. Mathews, and D.D. Meisel, Up in smoke? UHF radar meteor observations and the "terminal event." CEDAR Workshop, Santa Fe, NM (27 June - 2 July, 2004). Szasz, C., J. Kero, A. Pellinen-Wannberg, T. Aso, J.D. Mathews, and N.J. Mitchell, Latitudinal effects on meteor diurnal rates, Meteoroids 2004, London Ontario, contributed poster (15-20 August, 2004). Meisel, D.D., E. Bauer, K. Anne, M. Valites, B.D. Bartlett, S. Briczinski, J.D. Mathews, and D. Janches, Heliospheric modulation of the extrasolar micrometeors detected with the Arecibo UHF radar, Meteoroids 2004, London Ontario, Contributed, 10-4, (15-20 August, 2004). Bauer, E.E., D.D. Meisel, K.M. Anne, M.T. Haas, J.D. Mathews, and S. Briczinski, Heliospheric modulation of Arecibo hyperbolic micrometeor rates, Astronomical Society of New York, Rensselaer Polytechnic Institute, Troy NY, Contributed Paper (23 October, 2004). Mathews, J.D., S. Briczinski, D.D. Meisel, J.K. Breakall, M.P. Sulzer, P. Perillat, and E.I. Castro, An on-dish 430 MHz interferometer for radar meteor observations at Arecibo, URSI National Radio Science Meeting, Boulder CO, 4-8 January, 2005. Briczinski, S.J., C.-H. Wen, and J.D. Mathews, Recent automated-search meteor results from Arecibo 430 MHz radar observations, URSI National Radio Science Meeting, Boulder CO, 4-8 January, 2005. Wen, C.-H., J.F. Doherty, and J.D. Mathews, A report on current research regarding the meteor trai echo and hyper-speed meteor events using the Arecibo 430 MHz radar, URSI National Radio Science Meeting, Boulder CO, 4-8 January, 2005. Invited Conference, Summer School or Workshop PapersMathews, J. D., "D-Region Research at Arecibo," 6th International Symposium of Equatorial Aeronomy, Aguadilla, Puerto Rico (July 1980). Mathews, J. D., "Incoherent Scatter Theory and Practice in the D-Region," United Kingdom 1982 ISCAT Summer School, Sheffield, England (September 1982). Mathews, J. D., "The Low Latitude D-Region Chemistry," United Kingdom 1982 ISCAT Summer School, Sheffield, England (September 1982). Mathews, J. D., "Possibilities for Multiple Incoherent Scatter Radar D-Region Studies," 2nd Workshop on the Incoherent Scatter Radar Database", Boulder, Co. (9-10 February 1983). Mathews, J. D., J. K. Breakall and G. K. Karawas, "The Discrete Prolate Spheroidal Filter as a Digital Signal Processing Tool," Workshop on Technical Aspects of MST Radars, Urbana, Il. (23-27 May 1983). Mathews, J. D., J. K. Breakall, M. P. Sulzer and J. K. Hargreaves, "Incoherent Scatter Radar Observations of the 60-100 km Ionosphere at Arecibo," Spring American Geophysical Union Meeting, Baltimore, Md. (June 1983). Mathews, J. D., "The Incoherent Scatter Radar as a Tool for Studying the Ionosphere D-Region", XVIII General Assembly, International Union of Geodesy and Geophysics (IUGG), Inter-Disciplinary Symposium in Interim Results from the Middle Atmosphere Program, Hamburg, Federal Republic of Germany (15-27 August 1983). Mathews, J. D., "Some Aspects of Metallic Ion Chemistry and Dynamics in the Mesosphere and Thermosphere," First GLOBMET Symposium, Dushanbe, Tadzhikistan, USSR (August 1985). Mathews, J. D., C. L. McCart, E. H. Klevans, R. A. Walker, R. Fisher, K. S. Kunz and J. A. Brighton, "An Artist-in-Residence Program in a College of Engineering," IEEE Society on Social Implications of Technology conference A Delicate Balance: Technics, Culture, and Consequences, California State University, Los Angeles (20-21 October 1989). Mathews, J. D., C. R. Philbrick, Q. Zhou, C. S. Gardner and T. J. Beatty, "Simultaneous Observations of Narrow Sodium and Narrow Ionization Layers Using both Lidar and Incoherent Scatter Radar Techniques at Arecibo," International Symposium on Middle Atmosphere Studies, Dushanbe, Tadzhikistan, USSR (November 1989). Mathews, J. D., Y. T. Morton and Q. Zhou, "Tides and Acoustic-Gravity Waves as Observed in the Motions of Ionospheric E Region Meteoric Ion Layers," International Symposium on Middle Atmosphere Studies, Dushanbe, Tadzhikistan, USSR (November 1989). Getman, V. S., J. D. Mathews, Y. T. Morton, Q. Zhou and R. G. Roper, "Observations of Long-Lived Meteor Trails at Arecibo Using Optical and Radar Techniques," International Symposium on Middle Atmosphere Studies, Dushanbe, Tadzhikistan, USSR (November 1989). Mathews, J. D., Q. Zhou, T. J. Kane and C. S. Gardner, "Ion and Sodium Sporadic Layer Results from 1989 AIDA Campaign," Proceedings of 1992 Solar Terrestrial Energy Program (STEP) Symposium/5th Committee on Space Research (COSPAR) Colloquium, Johns Hopkins University, Applied Physics Laboratory, Baltimore, Md. (24-28 August 1992). Mathews, J. D., "Radar Measurements of Dynamics and Layering Processes in the 80-150 km Region at Arecibo," World Space Congress, Washington, DC (28 August-5 September 1992). Mathews, J. D., "Dust and Stuff or Where Have all the Meteors Gone?," paper presented at the Telluride Institute, Telluride, Co. (June 1993). Mathews, J. D., "The Dynamics of Ion Layer Generation in the 80-150 km Altitude Region," Proceedings of XXIV General Assembly of the URSI, Kyoto, Japan (25 August-2 September 1993) (invited). Mathews, J. D., "Lower Ionosphere Dynamics and Chemistry as Observed Using Incoherent Scatter Radar Techniques Alone and in Combination with other Instruments," 30th Committee on Space Research (COSPAR) Scientific Assembly, Scientific Commission C, Hamburg, Germany (11-21 July 1994) (invited). Mathews, J. D., T. J. Kane, C. S. Gardner and Q. Zhou, "Ion and Sodium Sporadic Layer Results from the 1989 AIDA Campaign," Proceedings of the 1992 Solar Terrestrial Energy Program (STEP) Symposium/5th Committee on Space Research (COSPAR) Colloquium, COSPAR Colloquia Series, 5, 363-368 (1994) (invited). Mathews, J. D., M. P. Sulzer and P. Perillat, "High Resolution ISR Studies of Layers and Waves in the 80-200 km Altitude Region above Arecibo," paper SA22A-06, Fall American Geophysical Union Meeting, San Francisco, Ca. (5-9 December 1994). Mathews, J. D., M. P. Sulzer and P. Perillat, "High-Resolution ISR Observations of Layer and Wave Structures in the 80-200 km Altitude Region above Arecibo: Initial Results and Interpretations," paper G-1:2, URSI National Radio Science Meeting, Boulder, Co. (3-7 January 1995) (invited). Mathews, J. D., "Aspects of Layer and Wave Processes Revealed by High-Resolution ISR Observations of the 50-270 km Ionosphere at Arecibo," paper GAB52D-4, XXI General Assembly, International Union of Geodesy and Geophysics (IUGG), Boulder, Co. (2-14 July 1995) (invited). Mathews, J. D., “Apparent electrodynamic coupling of ion layers in the 90-270 km altitude region above Arecibo,” 1996 National Radio Science Meeting, Boulder, CO, USA (9-13 January, 1996). Mathews, J. D., D. D. Meisel and Q. Zhou, “Very High Resolution Radar Studies of Micrometeors at Arecibo Observatory,” American Geophysical Union Spring 1997 Meeting, Baltimore, Md. (May 27-30, 1997). Mathews, J. D., D. W. Machuga and M. P. Sulzer, “The Intermediate Tidal Ion Layer, Ion Rain, and F-Region Instabilities,” 1997 IEEE AP-S International Symposium and URSI Radio Science Meeting, Montreal, Canada (July, 1997). Zhou, Q.-H., J. D. Mathews, and D. D. Meisel, “Meteor studies at Arecibo Observatory,” URSI National Radio Science Meeting, Boulder, CO (5-9 January 1998). Mathews, J. D., D. D. Meisel, and Q. Zhou, “The radar scattering properties of meteors: A brief review and a few thoughts,” URSI National Radio Science Meeting, Boulder, CO (5-9 January 1998). Janches, D., J. D. Mathews, D. D. Meisel, and Q. Zhou, “UHF observations of meteors during the November 1995 Leonids period,” URSI National Radio Science Meeting, Boulder, CO (5-9 January 1998). Kane, T.J., J.D. Mathews, S. Collins, and G. Earle, Recent multi-instrument observations of layering in the MLT region above Arecibo, International Union of Geodesy and Geophysics (IUGG) General Assembly XXII, Birmingham, UK, 1999. Zhou, Q.-H., J. D. Mathews, and Q.-N. Zhou, Incoherent scatter radar study of the impact of meteoric flux on E-region ionization, URSI National Radio Science Meeting, Boulder, CO (4-8 January 1999). Mathews, J. D., “A review of meteor physics and radar scattering mechanisms,” CEDAR 2000, Boulder, CO (25-30 June 2000). Mathews, J. D., D. Janches, and D. D. Meisel, “The micrometeoroid mass flux into the upper atmosphere: An update on Arecibo results and a comparison with past estimates,” URSI US National Meeting, Boulder CO (8-11 January 2001). Mathews, J. D., Q.-H. Zhou, and D. Janches, “New aeronomic and radio science results from meteor observations made using the large-aperture V/UHF radars,” paper 37.1, CEDAR 2001, Longmont, CO (17-22 June, 2001). Pellinen-Wannberg, A., D. Janches, A. Westman, J. D. Mathews, and D. D. Meisel, “Interplanetary dust particle distribution in the Earth's vicinity studies with the EISCAT and Arecibo IS radar systems,” 10th EISCAT Workshop, Tokyo, Japan (23-27 July, 2001). Mathews, J. D., D. Janches, D. D. Meisel, Q.-H. Zhou, S. Close, and A. Pellinen-Wannberg, “The role of large-aperture V/UHF radar meteor observations in meteor science,” Meteoroids 2001, Kiruna, Sweden (6-10 August, 2001). Mathews, J. D., “Some thoughts on micrometeoroids and dusty plasmas,” URSI National Meeting, Boulder CO (9-12 Jan, 2002). Pasko, V., M. Stanley, J. Mathews, U. Inan, and T. Wood, “Electrical discharge from a thundercloud top to the lower ionosphere,” 2002 CEDAR Workshop, Longmont, Colorado (16-21 June 2002). Pasko, V., M. Stanley, J. Mathews, U. Inan, and T. Wood, “Electrical discharge from a thundercloud top to the lower ionosphere,” 27th General Assembly of the International Union of Radio Science, Proceedings CD, HGE1-0857, Maastricht, The Netherlands (17-24 August 2002). Pasko, V. P. U. S. Inan, T. G. Wood, M. A. Stanley, J. D. Mathews, J. J. George, N. T. Fong, “Observations of Early/Fast VLF Events on Vieques Island, Puerto Rico,” American Geophysical Union 2002 Fall Meeting, San Francisco, California, EOS, 83, N 47, p. F138 (6-10 December 2002). Mathews, J.D., “Radio science issues surrounding HF/VHF/UHF radar meteor studies,” Arecibo Radar Meteor Workshop, Arecibo Observatory (10-12 March, 2003). Mathews, J.D., “Radio science issues surrounding HF/VHF/UHF radar meteor studies,” IEEE/APS/URSI North American Radio Science Meeting, Columbus, OH, 20.1 (22-27 June, 2003). Zhou, Q.-H., D. Janches, T. Nakamura, J.D. Mathews, Y.T. Morton, and T. Stover, UHF and VHF meteor observations using the Arecibo and MU radars, IEEE/APS/URSI North American Radio Science Meeting, Columbus OH, Invited, 20.2, 22-27 June, 2003. Mathews, J.D., “The application of plasma concepts to radar meteor issues, URSI National Radio Science Meeting,” Boulder CO, G/H2-1 (5-8 January, 2004). Makela, J.J., M.C. Kelley, J.D. Mathews, P.M. Kintner, N. Aponte, B.M. Ledvina, M.J. Nicolls, and I. Seker, Steep electron density gradients in the midlatitude nighttime ionosphere: Current understanding and future directions, American Geophysical Union, Fall Meeting, San Fansisco, 5-9 December, 2004. Papers Submitted and in ReviewSzasz, C., A. Pellinen-Wannberg, J.D. Mathews, N.J. Mitchell, and W. Singer, Latitudinal variations of diurnal meteor rates, Earth, Moon, Plnts., in review, 2004. Zhou, Q.-N., J.D. Mathews, and Q. Du, Linear stage theoretical and numerical solutions of the Perkins instability equations in the inhomogeneous TEC case, Planet. Space Sci., in review (2005). Zhou, Q.-N., J.D. Mathews, and C.A. Miller, A numerical case study of the Perkins instability equations with Gaussian shape initial condition for the TEC homogeneous case, Planet. Space Sci., in review (2005). Zhou, Q.-N., J.D. Mathews, and Q.-H. Zhou, A survey of horizontal electron concentration gradients in the F-region over Arecibo, Space Sci. Rev., in review (2005). Papers in Final PreparationBriczinski, S.J., J.D. Mathews, and D.D. Meisel, Applications of an automated micrometeor event searching routine, J. Atmos. Solar-Terr. Phys., to be submitted (2005). Briczinski, S.J., J.D. Mathews, D.D. Meisel, and E. E. Bauer, Discovery of a micrometeoroid stream in an Aten type orbit., Astrophys. J. Lett., in preparation, 2005. Seker, I., J.D. Mathews, J. Wiig, and P. Farias-Gutierrez, Introduction to the Penn State Allsky Imager, J. Atmos. Solar-Terr. Phys., in preparation, 2005. Theses Directed (Case Western Reserve University)Skaras, John (M.S. 1975) Wave Phenomena in the Lower Thermosphere Above Arecibo (co-directed with B. S. Tanenbaum). Tepley, C. A. (M.S. 1978) Ion-Neutral Collision Frequencies and Mean Temperatures in the Arecibo D-Region. Bekeny, F. S. (M.S. 1979) Motion of Sporadic-E Layers in a Tidal Wind System. Webster, R. B. (M.S. 1981) The Development of a Numerical Model of the Nocturnal F-Region. Tucker, T. (M.S. 1983) A Computer Model of Sporadic Ion Layers in the E-Region of the Ionosphere. German, M. (M.S. 1985) Interference Detection and Correction while Performing Ionospheric Studies with an Incoherent Scatter Radar. Ying, W.-P. (M.S. 1985) Analysis of the D-Region Incoherent Scatter Ion Line Power Spectra. Roder, P. (M.S. 1985) Absolute Determination of the Arecibo 430 MHz Radar System Constant. Tong, Y. (M.S. 1987) Quasi-Quarterdiurnal Tide and E-Region Ion Layer Motion. Tepley, C. A. (Ph.D. 1981) An Investigation of Temperature and Metallic Composition of the Lower Ionosphere. Breakall, J. K. (Ph.D. 1983) On the Absolute Calibration and Theoretical Justification of High Resolution Ionospheric Results Obtained From Arecibo Radar Measurements. Ying, W. P. (Ph.D. 1987) Investigation of Ionospheric D Region Aeronomy Using Incoherent Scatter Radar and Optical Measurements. Theses Directed (Penn State Unibersity)Driggs, S. (Senior Honors Thesis, May 1990) Pulse Compression Codes with Desirable Autocorrelation Functions. Morton, Y. T. (Ph.D. 1991) Ion Layers, Tides, Gravity Waves, and Electric Fields in the Upper Atmosphere Inferred from Arecibo Incoherent Scatter Radar Measurements. Zhou, Q.-H. (Ph.D. 1991) A Joint Study of the Lower Ionosphere by Radar, Lidar, and Spectrometer During AIDA. Hunter, K., (Ph.D. 1996) Electromagnetic scattering from a thermalized plasma with a stochastic production-loss process. Machuga, D. W., (Ph.D. 1997) Investigation of Fine Scale Structure in the Ionosphere. Rajan, S., (Ph.D. 1998) Statistical Retrival of Water Vapor Profiles Using Zenith Pointing and Off-axis 22 GHz Radiometer Measurements. Janches, D., (Ph.D. 2000) Physical and Orbital Properties of Micrometeors Observed Using the 430 MHz Arecibo Observatory Radar. Zhou, Q.-N., (M.S. 2000) Horizontal Inhomogeneous Structures in the F Region Over Arecibo. Wen, C.-H. (Ph.D. 2005) Time-Frequency Signal Processing Techniques for Radar Remote Sensing Zhou, Q.-N. (Ph.D. 2005) A Numerical Investigation of the Perkins Instability Equations by the Pseudo-Spectral Method. Briczinski, S.J., (Ph.D. 2006) Automated UHF Radar Observations of Meteors with Aeronomic Applications. Two PhD and three MS theses currently in progress. Theses co-Directed (External Universities)Gutierrez, P.F., The Installation and Scientific Use of a Microbarograph at Arecibo Observatory, MSc thesis, Umeå University, Kiruna, Sweden, 2004. Wiig, J., State of the Art All-Sky Imaging System at Arecibo Observatory: Data Aquisition, Scientific Uses, and Web-Publishing, MSc thesis, Umeå University, Kiruna, Sweden, 2004.
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