Publications

2020
  • D. R. Themens, Jayachandran, P. T., Reid, B., & McCaffrey, A. M., The Limits of Empirical Electron Density Modeling: Examining the Capacity of E-CHAIM and the IRI for Modeling Intermediate (1- to 30-Day) Timescales at High Latitudes, Radio Science, 55, doi:10.1029/2018RS006763, 2020.
  • K. Meziane, A. Kashcheyev, S. Patra, P. T. Jayachandran, and A. M. Hamza, Solar cycle variations of GPS amplitude scintillation for the polar region, Space Weather., Accepted, 2020.
2019
  • A. M. McCaffrey & Jayachandran, P. T.. Determination of the refractive contribution to GPS phase “scintillation”. Journal of Geophysical Research: Space Physics, 124, 1454–1469. doi:10.1029/2018JA025759, 2019.
  • C. D. Flynn, A. M. McCaffrey, P. T. Jayachandran, and R. B. Langley, Discovery of new code interference phenomenon in GPS observables, GPS Solut, 23:65, doi:10.1007/s10291-019-0858-7, 2019.
  • Themens, D. R., Jayachandran, P. T., McCaffrey, A. M., Reid, B., & Varney, R. H.. A bottomside parameterization for the Empirical Canadian High Arctic Ionospheric Model. Radio Science, 54, 397–414. doi:10.1029/2018RS006748, 2019
  • D. R. Themens, P. T. Jayachandran, and A. M. McCaffrey, Validating the performance of the Empirical Canadian High Arctic Ionospheric Model (E-CHAIM) with in situ observations from DMSP and CHAMP, J. Space Weather Space Cli. 209, 9, A21, doi:10.1051/swsc/2019021, 2019.
  • L. V. Goodwin, Nishimura, Y., Zou, Y., Shiokawa, K., & Jayachandran, P. T., Mesoscale Convection Structures Associated with Airglow Patches Characterized using Cluster-Imager Conjunctions, Journal of Geophysical Research: Space Physics, 124, 7513, doi:10.1029/2019JA026611, 2019.
  • Y. Wang, Zhang, Q. -H., Ma, Y. -Z., Jayachandran, P. T., Xing, Z. -Y., N., B., & Zhang, S. -R., Polar ionospheric large-scale structures and dynamics revealed by TEC keogram extracted from TEC maps, Journal of Geophysical Research: Space Physics, 125, doi:10.1029/2019JA027020, 2019.
2018
  • McCaffrey, A, P. T. Jayachandran, R. B. Langley, and J.-M. Sleewaegen, On the accuracy of the GPS L2 observable for ionospheric monitoring, GPS Solutions, 22:23. doi:10.1007/s10291-017-0688-4, 2018.
  • Themens D. R., P. T. Jayachandran, and R. H. Varney, Examining the use of the NeQuick bottomside and topside parameterization at high latitudes, Adv. Space. Res., 61, 1, 287, doi:10.1016/j.asr.2017.09.037, 2018.
  • Wang Y,, Q.-H. Zhang, P. T. Jayachandran, J. Moen, Z.-Y. Zing, R. Chadwick, Y.-Z. Ma, J. M. Ruohoniemi, and M. Lester, The dependence of GPS phase variations on ionospheric plasma drift around noon sector of the polar ionosphere, Journal Geophysical Research: Space Physics, 123, 2370, doi:10.1002/2017JA024805, 2018.
  • Ma, Y.-Z, O.-H. Zhang, Z.-Y. Zing, P. T. Jayachandran, J. Moen, R. A. Heelis, and Y. Wang, Combined contribution of solar illumination, solar activity, and convection to ion upflow above the polar cap, Journal Geophysical Research: Space Physics, 123, 4317, doi:10.1029/2017JA024974, 2018.
  • Themens D. R., P. T. Jayachandran, D. Blitza, P. J. Erickson, I. Haggstrom, M. L. Lyashenko, B. Reid, R. H. Varney, and L. Pustovalova, Topside electron density parameterizations for middle and high latitudes: A topside parameterization based on the NeQuick, Journal of Geophysical Research:Space Physics, 123, 1603, doi:10.1002/2017JA024817, 2018.
    • Watson, C., R.B. Langley, D.R. Themens, A.W. Yau, A. Howarth, and P.T. Jayachandran, Receiver bias estimate and validation of e-POP GAP-O ionospheric radio occultation measurements, Radio Sci., 53, 166, doi:10.1002/2017RS006453, 2018.
2017
  • McCaffrey, A. M., and P. T. Jayachandran, Observation of Sub-Second Variations in Auroral Region Total Electron Content using 100 Hz sampling of GPS observables, J. Geophys. Res. Space Physics, 122, doi:10.1002/2017JA024255, 2017.
  • McCaffrey, A. M., P. T. Jayachandran, D. R. Themens, and R. B. Langley, Adv. Space Res., 59(8), 1984-1991, doi:10.1016/j.asr.2017.01.047, 2017
  • Mezaoui, H., A. M. Hamza, and P. T. Jayachandran, Dynamic analysis of the polar ionosphere using the GPS signal: Toward an optimization of the cutoff scale, Radio Science, 52(2), 271-281, 2017.
  • Athieno, R., P. T. Jayachandran, and D. R. Themens, A neural network based foF2 model for a single station in the polar cap, Rad. Sci., 52, doi:10.1002/2016RS006192, 2017
  • McCaffrey, A, and P. T. Jayachandran, Spectral characteristics of auroral scintillation using 100 Hz sampling, GPS Solutions, (Submitted, February 19, 2017).
  • Watson, C., R.B. Langley, D.R. Themens, A.W. Yau, A. Howarth, and P.T. Jayachandran. Receiver bias estimate and validation of e-POP GAP-O ionospheric radio occultation measurements, Radio Sci., (Submitted June 20, 2017).
  • Themens, D.R., P.T. Jayachandran, and R.H. Varney, Examining the use of the NeQuick bottomside and topside parameterizations at high latitudes, Advances in Space Research, (Submitted June 20, 2017).
  • Themens, D.R., P.T. Jayachandran, I. Galkin, and C. Hall. The Empirical Canadian High Arctic Ionospheric Model (E-CHAIM): NmF2 and hmF2, J. Geophys. Res. Space Physics, (Submitted May 24, 2017)
  • Zhang, Q.-H, Y.-Z., Ma, P. T. Jayachandran, J. Moen, M. Lockwood, Y.-L. Zhang, J. C. Foster, S.-R. Zhang, Y. Wang, D. R. Themens, B. -C. Zhang, and Z. Y. Xing, Polar cap hot patches: enhanced density structures different from the classical patches in the ionosphere, Geophys. Res. Lett., (Submitted, May 16, 2017).
  • Y. Wang, Q.-H. Zhang, P. T. Jayachandran, J. Moen, Z.-Y. Zing, R. Chadwick, Y.-Z. Ma, J. M. Ruohoniemi, and M. Lester, The dependence of GPS phase variations on ionospheric plasma drift around noon sector of the polar ionosphere, Geophys. Res. Lett., (Submitted, June 8, 2017).
  • Jayachandran, P. T., A. Hamza, K. Hosokawa, H. Mezaoui, and K. Shiokawa, GPS amplitude and phase scintillation associated with polar cap auroral forms, J. Atmos. Solar. Terr. Physics, (Submitted, April 13, 2017).
  • McCaffrey, A., P. T. Jayachandran, R. B. Langley, and J. M. Sleewaegen, On the accuracy of the GPS L2 observable for ionospheric monitoring, GPS Solution, (Submitted, June 16, 2017).
2016
  • Watson, C., P. T. Jayachandran, H. J. Singer, R. J. Redmon, and D. Danskin, GPS TEC response to Pc4 "giant pulsations", J. Geophys. Res. Space Physics, 121, doi:10.1002/2015ja022253, 2016.
  • Themens, D. R., and P. T. Jayachandran, Solar Activity Variability in the IRI at high latitudes: Comparisons with GPS Total Electron Content, Journal of Geophysical Research: Space Physics, doi:10.1002/2016ja022664, 2016.
  • Watson, C., P. T. Jayachandran, and J. W. MacDougall, Characteristics of GPS TEC variations in the polar cap ionosphere, Journal of Geophysical Research: Space Physics, doi:10.1002/2015JA022275, 2016.
  • Wang, Y., Q. H. Zhang, P. T. Jayachandran, M. Lockwood, S.-R. Zhang, J. Moen, Z. Y. Xing, Y. Z. Ma, and M. Lester, A comparison between large-scale irregularities and scintillations in the polar ionosphere, Geophysical Research Letters, doi:10.1002/2016gl069230, 2016
  • Watson, C., P. T. Jayachandran, and J. W. MacDougall, GPS TEC variations in the polar cap ionosphere: Solar wind and IMF dependence, J. Geophys. Res. Space Physics, 121, doi:10.1002/2016JA022937, 2016.
  • Prasad, R., S. Kumar, and P. T. Jayachandran, Receiver DCB estimation and GPS vTEC study at a low latitude station in the South Pacific, J. Atmos. Solar. Terr. Physics, 149, 120-130, 2016.
  • Prikryl. P., R. Ghoddousi-Fard, J. M. Weygand, A. Vijanen, M. Connors, D. W. Danskin, P. T. Jayachandran, K. S. Jacobsen, Y. L. Andalsvik, E. G. Thomas, J. M. Ruohoniemi, R. T. Durgonics, K. Oksavik, Y. Zhang, E. Spanswick, M. Aquino, and V. Sreeja, GPS Phase scintillation at high latitudes during the geomagnetic storm of 17-18 March 2015. J. Geophys. Res. Space Physics, 121, doi:10.1002/2016JA023171, 2016.
  • Atheino, R., and P. T. Jayachandran, MUF variability in the Arctic region: A statistical comparison with the ITU-R variability factors, Rad. Sci., Rad. Sci., 51, doi:1002/2016RS006096, 2016.
2015
  • P. Prikryl, P. T. Jayachandran, R. Chadwick, and T. D. Kelly, Climatology of GPS phase scintillation at northern high latitudes for the period from 2008 to 2013, Ann. Geophys., 33, 531–545, doi:10.5194/angeo-33-531-2015, 2015.
  • P. Prikryl, R. Ghoddousi-Fard, E. G. Thomas, J. M. Ruohoniemi, S. G. Shepherd, P. T. Jayachandran, D. W. Danskin, E. Spanswick, Y. Zhang, Y. Jiao, and Y. T. Morton, GPS Phase Scintillation at high-latitudes during geomagnetic storms of 7-17 March 2012 - Part 1: The North American Sector, Ann. Geophys., 33, doi:10.5194/angeo-33-637-2015, 637–656, 2015.
  • P. Prikryl, R. Ghoddousi-Fard, L. Spogli, C. N. Mitchell, G. Li, B. Ning, P. J. Cilliers, V. Sreeja, M. Acquino, M. Terkildsen, P. T. Jayachandran, Y. Jiao, Y. T. Morton, J. M. Ruohoniemi, E. G. Thomas, Y. Zhang, A. T. Weatherwax, L. Alfonsi, G. De Franceschi, and V. Romano, GPS phase scintillation at high latitudes during geomagnetic storms of 7–17 March 2012 – Part 2: interhemispheric comparison, Ann. Geophys., 33, 657–670, doi:10.5194/angeo-33-657-2015, 2015.
  • R. Athieno, P. T. Jayachandran, D. R. Themens, and D. W. Danskin, Comparison of observed and predicted MUF (3000)F2 in the polar cap region, Radio. Sci., 50, doi:10.1002/2015RS005725, 2015.
  • H. Mezaoui, A. M. Hamza, and P. T. Jayachandran, High-latitude Scintillations: Exploring the Castaing Distribution, J. Geophys. Res., Space Physics, J. Geophys Res. Space Physics, 120, doi:10.1002/2015JA021304, 2015.
  • C. Watson, P. T. Jayachandran, H. J. Singer, R. J. Redmon, and D. W. Danskin, Large amplitude GPS TEC variations associated with Pc5-6 magnetic field variations observed on the ground and at geosynchronous orbit, J. Geophys. Res. Space Physics, 120, doi:10.1002/2015JA021517, 2015.
  • D. R. Themens, P. T. Jayachandran, and R. B. Langley, The nature of GPS differential receiver bias variability: An examination in the polar cap region, J. Geophys. Res. Space Physics, 120, 8155-8175, doi:10.1002/2015JA021639, 2015.
2014
  • R. Burston and P. T. Jayachandran, Effect of grid boundary expansion to include one additional data source on ionospheric imaging accuracy, IEEE Trans. Geo. and Rem. Sens., doi:10.1109/TGRS.2013.2295635, 2014.
  • R. Burston, K. Hodges, I. Astin, and P. T. Jayachandran, Automated identification and tracking of polar-cap plasma patches at solar minimum, Ann. Geophys., 32, 197-206, doi:10.5194/angeo-32-197-2014, 2014.
  • D. R. Themens, P. T. Jayachandran, M. J. Nicolls, and J. W. MacDougall, A top to bottom evaluation of IRI 2007 within the polar cap, J. Geophys. Res., Space Physics, 119, doi:10.1002/2014JA020052.
  • H. Mezaoui, A. M. Hamza, and P. T. Jayachandran, Investigating high-latitude ionospheric turbulence using global positioning system data, Geophys Res., Lett., 41, doi:10.1002/2014GL061331, 2014.
  • P. Prikryl, P. T. Jayachandran, S. C. Mushini, and I. G. Richardson, High-latitude GPS phase scintillation and cycle slips during high-speed solar wind streams and interplanetary coronal mass ejections: A superposed epoch analysis, Earth, Planets and Space, 66:62, 2014.
  • M. Ghezelbash, A. V. Koustov, D. R. Themens, and P. T. Jayachandran, Seasonal and diurnal variations of PolarDARN F region echo occurrence in the polar cap and their causes, J. Gophys. Res., Space Physics, 119, 10,426-10,439, doi:10.1002/2014JA020726, 2014.
  • A. V. Koustov, P. V. Ponomarenko, M. Ghezelbash, D. R. Themens, and P. T. Jayachandran, Electron density and electric field over Resolute Bay and F region echo detection with the Rankin Inlet and Inuvik SuperDARN radars, Radio Sci., 49, 1194-1205, doi:10.1002/2014RS005579, 2014.
2013
  • P. Prikryl, R. Ghoddousi-Fard, B. S. R. kunduri, E. G. Thomas, A. J. Coster, P. T. Jayachandran, E. Spanswick, and D. W. Danskin, GPS phase scintillation and proxy index at high-latitudes during a moderate geomagnetic storm, Ann. Geophys., 31, 805, doi:10-6194/angeo-31-805-2013, 2013.
  • P. Prikryl, V. Sreeja, M. Aquino, P. T. Jayachandran, Probabilistic forecasting of ionospheric scintillation and GNSS receiver signal tracking performance at high latitudes, Annals of Geophysics, 56, 2, R0222, doi:10-4401/ag-6219, 2013.
  • P. Prikryl, Y. Zhang, Y. Ebihara, R. Ghoddousi-Fard, P. T. Jayachandran, J. Kinrade, C. N. Mitchell, A. T. Weatherwax, G. Bust, P. J. Cilliers, L. Spogli, L. Alfonsi, V. Romano, B. Ning, G. Li, M. Jarvis, D. W. Danskin, E. Spanswick, E. Donovan, and M. Terkildsen, An interhemespheric comparison of GPS phase scintillation with auroral emission observed at the South pole and from the DMSP satellite, Annals of Geophysics, 56, R0216, doi:10.4401/ag=6227, 2013.
2012
  • D. Mori, A. V. Koustov, P. T. Jayachandran, and N. Nishitani, Resolute Bay CADI ionosonde drifts, PolarDARN HF velocities and SuperDARN cross polar cap potential, Rad. Sci., 47, RS3003, doi:10.1029/2011RS004947.
  • P. T. Jayachandran, K. Hosokowa, K. Shiokawa, Y. Otsuka, C. Watson, S. C. Mushini, J. W. MacDougall, P. Prikryl, R. Chadwick, and T. D. Kelly, GPS total electron content variations associated with poleward moving sun aligned arcs, J. Geophys. Res., 117, A05310, doi:10.1029/2011JA017423.
  • D. R. Themens, P. T. Jayachandran, R. B. Langley, J. W, MacDougall, and M. J. Nicolls, Determining Receiver Biases in GPS-derived Total Electron Content in the Auroral Oval and Polar Cap region Using Ionosonde measurements, GPS solutions, doi:10.1007/s10291-012-0284-6.
  • P. Prikryl, P. T. Jayachandran, S. C. Mushini, and I. G. Richardson, Towards probabilistic forecasting of high-latitude GPS phase scintillation, Space Weather, 10, S08005, doi:10.1029/2012SW000800.
2011
  • P. Prikryl, P. T. Jayachandran, S. C. Mushini, and R. Chadwick, Climatology of GPS phase scintillation and HF radar backscatter for the high-latitude ionosphere under solar minimum conditions, Ann. Geophys., 29, 377, doi:10.5194/angeo-29-377-2011, 2011.
  • C. Watson, P. T. Jayachandran, E. Spanswick, E. F. Donovan, and D. W. Danskin, GPS TEC Technique for observation of the evolution of substrom particle precipitation, J. Geophys. Res., 116, A00I90, doi:10.1029/2010JA015732, 2011.
  • P. Prikryl, L. Spogli, P. T. Jayachandran, J. Kinrade, C. N. Mitchell, B. Ning, G. Li, P. J. Cilliers, M. Terkildsen, D. W. Danskin, E. Spanswick, E. Donovan, A. T. Weatherwax, W. A. Bristow, L. Alfonsi, G. De Franceschi, V. Romano, C. M. Ngwira, and B. D. L. Opperman, Interhemespheric comparison of GPS phase scintillation at high latitudes during the magnetic-cloud-induced geomagnetic storm of 5-7 April 2010, \ Ann. Geophys., 29, 2287, doi:10.5194/angeo-29-2287-2011, 2011.
  • S. C. Mushini, P. T. Jayachandran, R. B. Langley, J. W. MacDougall, and D. Pokhotelov, Improved amplitude and phase scitnillation indices derived from wavelet detrended high latitude GPS data, GPS Solut., doi:10.1007/s10291-011-0238-4, 2011
  • J. W. MacDougall, M. A. Abdu, I. Batista, R. Buriti, A. F. Medeiros, P. T. Jayachandran, and G. Borba, Spaced transmitter measurements of medium scale traveling ionospheric disturbances near the equator, Geophys. Res. Lett., 38, L16806, doi:10.1029/2011GL048598, 2011.
  • P. T. Jayachandran, C. Watson, I. J. Rae, J. W. MacDougall, D. W. Danskin, R. Chadwick, T. D. Kelly, P. Prikryl, K. Meziane, and K. Shiokawa, High-latitude GPS TEC changes associated with a sudden magnetospheric compression, Geophys. Res. Lett., 38, L23104, doi:10.1029/2011 GL050041, 2011.
  • MacDougall, J. W. and P. T. Jayachandran, Solar terminator and auroral sources for traveling ionospheric disturbances in the midlatitude F region, J. Atmos. Solar. Terr. Phys., 1364, doi:10.1016/j.jastp.2011.10.009, 2011.
2010
  • D. Pokhotelov, P. T. Jayachandran, C. N. Mitchell, J. W. MacDougall., M. H. Denton, GPS tomography in the polar cap: comparison with ionosondes and in-situ spacecraft data, GPS solut., doi:10.1007/s10291-010-0170-z, 2010.
  • A. V. Dmitriev, P. T. Jayachandran, and L-C. Tsai, Elliptical model of cut-off boundaries for the solar energetic particles measured by POES satellites in December 2006 J. Geophys. Res., 115, A12244 doi:10.1029/2010JA015380, 2010.
  • P. Prikryl, P. T. Jayachandran, S. C. Mushini, D. Pokhotelov, J. W. MacDougall, E. Donovan, E. Spanswick, and J. -P. St.-Maurice, GPS TEC and cycle slips observed at high latitudes during solar minimum, Ann. Geophys., 28, 1307, 2010.
  • D. Pokhotelov, P. T. Jayachandran, C. Mitchell, and M. H. Denton, High-latitude ionospheric response to co-rotating interaction region and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes, Proc. Royal Soc.-A, doi:10.1098/rspa.2010.0080, 2010.
2009
  • Watson, C.J. and P. T. Jayachandran, Azimuthal expansion of the dipolarization at geosynchronous orbits, Ann. Geophys., 27, 1, 2009.
  • Jayachandran, P. T., R. B. Langley, J. W. MacDougall, S. C. Mushini, D. Pokotelov, A, M. Hamza, I. R. Mann, D. K. Milling, Z. C. Kale, R. Chadwick, T. Kelly, D. W. Danskin, and S. C. Carrano, Canadian High Arctic Ionospheric Network, Radio Sci., 44, RS0A03, doi:10.1029/2008RS004046, 2009.
  • Jayachandran, P. T., K. Hosokawa, S. C. Mushini, J. W. MacDougall, R. B. Langley, and K. Shiokawa, GPS TEC Variations associated with a polar cap arc, J. Geophys. Res., 114, A12304, doi:10.1029/2009ja014916, 2009.
  • MacDougall, J. W., M. A. Abdu, I. Batista, F.R. Fagundes, Y. Sahai, and P. T. Jayachandran, On the production of traveling ionospheric disturbances by atmospheric gravity waves, J. Atmos. Solar Terr. Physics, 71, 2013, doi:10.1016/j.jastp.2009.09.006, 2009.
  • MacDougall, J. W., G. Li, and P. T. Jayachandran, Traveling ionospheric disturbances near London, Canada, J. Atmos. Solar Terr. Physics, 71, 2077, doi:10.1016/j.jastp.2009.09.016, 2009.
  • Sadighi, S., P. T. Jayachandran, N. Jakowski, and J. W. MacDougall., Comparison of the CHAMP radio occultation data with the Canadian advanced digital ionosonde in the polar regions, J. Adv. Space Res., 44, 1304, doi:10.1016/j.asr.2009.07.016, 2009.
  • Mushini, S. C., P. T. Jayachandran, R. B. Langley, and J. W. MacDougall., Use of varying shell heights derived from ionosonde data in calculating vertical total electron content (TEC) using GPS- New method, J. Adv. Space Res., 44, 1309, doi:10.1016/j.asr.2009.07.015, 2009.
  • Pokhotelov, D, C. N. Mitchell, P. T. Jayachandran, J. W. MacDougall, and M. H. Denton, Ionospheric response to the CIR-driven geomagnetic storm of October 2007, J. Geophys. Res., 114, A12311, doi:10.1029/2009JA014216, 2009.
2008
  • J. W. MacDougall, and P. T. Jayachandran, Winter Polar cap current estimation, Adv. Space Res., 42, 797, 2008
  • P. T. Jayachandran, N. Sato, Y. Ebihara, A. S. Yukimatu, A. Kadokura, J. W. MacDougall, E. F. Donovan, and K. Liou, Oscillation of the equatorward boundary of the ion auroral oval – Radar observations, J. Geophys. Res., 223, A08208, doi:10.1029/2007JA012870, 2008
2007
  • P.T. Jayachandran, J. W. MacDougall, A. M. Hamza, and M. G. Henderson, Observations of dipolarization at geosynchronous orbits and its response in the polar cap convection during extreme southward interplanetary magnetic field conditions, J. Geophys. Res., 112, A 10216, doi:10.1029/2007JA012544, 2007
  • W. Liu, E. F. Donovan, J. Liang, I. Voronkov, E. Spanswick, P. T. Jayachandran, B. Jackel, and M. Meurant, On the Equatorward Motion and Fading of Proton Aurora During Substorm Growth Phase, J. Geophys. Res., 112, A10217, doi:10.1029/200JA012495, 2007
  • P.T. Jayachandran, and J. W. MacDougall., Substorm time scales from polar cap convection measurements, Earth Planet and Space, 59, e29-e32, 2007
  • E. F. Donovan, J. Spann, W. Liu, T. Trondsen, R. Ridley, T. Immel, E. Spanswick, R. Rankin, P. T. Jayachandran, D. Knudsen, B. Jackel, L. Cogger, J. Murphree, G. Sofko, and K. McWilliams, Global auroral imaging, system level science, and ILWS, Adv, Space. Res., 40, 409, 2007
  • J. W. MacDougall, and P. T. Jayachandran, Reply to comment by G. L. Siscoe and K. D. Siebert on –œPolar cap voltage saturation –, J. Geophys. Res., 112, A06228, doi:10.1029/2007JA012263, 2007
  • J. W. MacDougall, and P. T. Jayachandran, Polar Patches: Auroral precipitation effects, J. Geophys. Res., 112, A05312, doi:10.1029/2006JA011930, 2007.
2006
  • J. W. MacDougall, and P. T. Jayachandran, Polar Cap voltage saturation, J. Geophys. Res., 111, A12306, doi:10.1029/2006JA011741, 2006
  • P. T. Jayachandran, J. W. MacDougall, and E. F. Donovan, Ground-based radar detection of the inner boundary of the ion plasma sheet and its dynamics associated with substorms, Advances in Polar Upper Atmospheric Research, 20, 63, 2006
  • P. T. Jayachandran, J. W. MacDougall, D. R. Moorcroft, E. F. Donovan, Ground Based Radar Detection of the Inner Boundary of the Ion Plasma Sheet and its Response to the Changes in the Interplanetary Magnetic Field, Proceedings of the NATO IST-056 workshop, June 2006
  • D. Knudsen, E. Donovan, P. T. Jayachandran, and 8 authors, Ionosphere-Thermosphere Science in Canada and Opportunities for SWARM, Proceedings of the SWARM Science workshop, 2006
2005
  • J. W. MacDougall, and P. T. Jayachandran, Polar Cap influx, Annales, Geophys, 23, 1755, 2005
  • J. W. MacDougall and P. T. Jayachandran, Sporadic E at cusp latitudes, J. Atmos. Sol. Terr. Phys., 67, 1419, 2005
  • P. T. Jayachandran, E. F. Donovan, J. W. MacDougall, D. R. Moorcroft, J.-P. St-Maurice, K. Liou, and P. T. Newell, Global and Local equatorward expansion of the ion auroral oval before substorm onsets, J. Geophys. Res., doi:10.1029/2004JA010837, 2005
2004
  • D. J. McEven, W. Guo, J. W. MacDougall, and P. T. Jayachandran, The Polar Ionosphere, Advances in Space Research , 34, 2080, 2004
2003
  • P.T. Jayachandran , J. W. MacDougall , E. F. Donovan , J. M. Ruohoniemi , K. Liou, D. R. Moorcroft and J.-P. St-Maurice, Substorm Associated Changes in High-latitude Ionospheric Convection, Geophys. Res. Lett., 30(20),2064, doi:10.1029/2003GL017497, 2003
  • M. A. Abdu , J. MacDougall, I. S. Batista, J. H. A. Sobral, and P. T. Jayachandran, Equatorial evening pre-reversal electric field enhancement and Sporadic E layer disruption: A manifestation of E and F region coupling, J. Geophys. Res., 108 (A6), 1254, doi:10.1029/2002JA009285, 2003
2002
  • P. T. Jayachandran, J. W. MacDougall, D. R. Moorcroft, J.-P. St-Maurice, K. Liou, and P. T. Newell, Substorm onset location and the Equatorward boundary of the Proton auroral oval, Geophys. Res. Lett., 29(24), 2159, doi:10.1029/2002GL015484, 2002
  • P. T. Jayachandran, E. F. Donovan, J. W. MacDougall, J.-P. St-Maurice, D. R. Moorcroft, and P. Prikryl, SuperDARN E-region backscatter boundary in the dusk-midnight sector - Tracer of equatorward boundary of auroral oval, Annales Geophysicae, 20, 1899, 2002
  • P. T. Jayachandran, J. W. MacDougall, J.-P. St-Maurice, D. R. Moorcroft, P. T. Newell, and P. Prikryl, Coincidence of the ion precipitation boundary with the HF E region backscatter boundary in the dusk-midnight sector of the auroral oval, Geophys. Res. Lett., 10.1029/2001GL014184, 2002
2001
  • P. T. Jayachandran and J. W. MacDougall, Polar cap sunward convection J. Geophys. Res., 106, 29009-29025, 2001
  • J. W. MacDougall and P. T. Jayachandran, Polar Cap convection relationship with solar wind, Radio Sci., 36, 1869, 2001
2000
  • J. W. MacDougall, J. M. C. Plane and P. T. Jayachandran, Polar Cap Sporadic-E: Part 2, Modeling, J. Atmos. Terr. Phys., 62, 1169-1176, 2000
  • J. W. MacDougall, P. T. Jayachandran and J. M. C. Plane, Polar Cap Sporadic-E: Part 1, Observations, J. Atmos. Terr. Phys., 62, 1155-1167, 2000
  • P. T. Jayachandran, J.-P. St.-Maurice, J.W. MacDougall and D. R. Moorcroft, HF detection of slow long-lived E-region plasma structures, J. Geophys. Res., 105, 2425-2442, 2000
  • P. T. Jayachandran and J. W. MacDougall, Central polar cap convection response to short duration southward interplanetary magnetic field. Ann. Geophys., 18, 887, 2000
1999
  • P. T. Jayachandran, P. Sri Ram, P. V. S. Rama Rao and V. V. Somayajulu, Sequential Sporadic-E layers at low latitudes in the Indian Sector, Ann. Geophysicae, 17, 519, 1999
  • P. T. Jayachandran and J. W. MacDougall, Geophys. Seasonal and IMF By effect on the polar cap convection orientation, Res. Lett., 26, 975, 1999
1998
  • P. V. S. Rama Rao, P. Sriram, P. T. Jayachandran and D. S. V. V. D. Prasad, Satellite Beacon and ionosonde measurements of ionospheric irregularities over India during the equinoctial month of 1991,Acta. Geopy. Hung. 33, 19-24, 1998
  • P. T. Jayachandran, J. W. MacDougall, J. F. Cecile and J. H. A. Sobral, Equatorial F-region zonal plasma irregularity drifts under magnetospheric disturbances, M. A. Abdu.Geophys. Res. Lett., 25, 4137, 1998
  • J. W. MacDougall, M. A. Abdu, P. T. Jayachandran, J. F. Cecile and I. S Batista, Pre Sunrise Spread-F over Forteleza, J. Geophys. Res., 103, 23415, 1998
1997
  • P. V. S. Rama Rao, D. S. V. V. D Prasad, P. Sri Ram and P. T. Jayachandran, Preliminary results of the ionosonde measurements at Waltair (17.7oN) during the Total Solar Eclipse of 24th October 1995, Kodaikanal Obs. Bull.,4, 123-129, 1997
  • P. V. S. Rama Rao, D. S. V. V. D. Prasad, P. Sri Ram, and P. T. Jayachandran, Ionospheric changes observed over Waltair (Dip 20oN) during the total solar eclipse of 24 October 1995, Terr. Atmos. And Ocean (Taiwan), 8, 203, 1997
  • P. V. S. Rama Rao, P. T. Jayachandran, P. Sri Ram, B. V. Ramana Rao, D. S. V. V. D. Prasad and K. K. Bose, Characteristics of VHF radiowave scintillation over a solar cycle (1983-1993) at a low latitude station: Waltair (17.7oN, 83.3oE), Annales Geophysicae, 15, 729-733, 1997
  • P. V. S. Rama Rao, P. T. Jayachandran and P. Sri Ram, Ionospheric Irregularities-Role of the equatorial ionization anomaly, Rad. Sci., 32, 1551-1557, 1997
  • P. V. S. Rama Rao, P. Sri Ram, P. T. Jayachandran and D. S. V. V. D. Prasad, Multistation VHF Scintillation studies at low latitudes, Planet. Space. Sci., 16, 1667-16678, 1997
  • P. T. Jayachandran, P. Sri Ram, V. V. Somayajulu and P. V. S. Rama Rao, Effect of equatorial ionization anomaly on the occurrence of Spread-F, Ann. Geophysicae. 15, 255-262, 1997
1996
  • P. V. S. Rama Rao, P. Sri Ram, P. T. Jayachandran and D. S. V. V. D. Prasad, Seasonal variations in Ionospheric Electron content and irregularities over Waltair-A comparison with SLIM Model, Adv. Space. Res., 18, 259-262, 1996
1994
  • P. V. S. Rama Rao, P. Sri Ram and P. T. Jayachandran, Short and long term variation of IEC over Waltair, Ind. J. Radio and Space Physics, 23, 340-346, 1994
1993
  • H. Chandra, G. D. Vyas, B. M. Pathan, A. Iyer, A. Naidu, S. M. Sadique, C. S. Salgoankar, T. R. Tyagi, P. N. Vijayakumar, Lakhasingh, K. N. Iyer, K. N. Pathak, A. K. Gwal, Sushlkumar, R. P. Singh, U. P. Singh, Birbal Singh, V. K. Jain, G. N. Navneeth, P. V. Korparkar, P. V. S. Rama Rao, P. T. Jayachandran, P. Sri Ram, N. Y. S. Santha Rao, A. Dasgupta, K. Basu and R. G. Rastogi, Coordinated multistation VHF scintillation observations in India during March-April, 1991, Ind. J. of Radio and Space Physics, 22, 69-81, 1993
 
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