P.T. Jayachandran: Radio Physics Lab – University of New Brunswick

Presentations

2020

Model validation and improvement efforts at CHAIN, D. R. Themens, P. T. Jayachandran, B. Reid, C. Watson, and A. McCaffrey, COSPAR International Space Weather Action Teams Inaugural Meeting, Cape Canaveral, Florida, February 2020.
Assimilative Canadian High Arctic Ionospheric Model (A-CHAIM), B. Reid, D. R. Themens, and P. T. Jayachandran, DASP Winter Workshop, Fredericton, New Brunswick, February 2020.
Optimization of Auroral Precipitation-Enhanced Electron Density Profiles Derived from Satellite-Based UVI Imager Data, C. Watson, D. R. Themens, Y. Zhang, A. M. McCaffrey, and P. T. Jayachandran, DASP Winter workshop, Fredericton, New Brunswick, February 2020.
Version 2.0 of the Empirical Canadian High Arctic Ionospheric Model (E-CHAIM), D. R. Themens, C. Watson, A. M. McCaffrey, P. T. Jayachandran, and B. Reid, DASP Winter workshop, Fredericton, New Brunswick, February 2020.
Does scintillation spectra tell us anything about the medium?, P. T. Jayachandran, Y. Wang, A. McCaffrey, D. R. Themens, and C. Watson, DASP Winter workshop, Fredericton, New Brunswick, February 2020.
Scintillation characteristics across the GPS frequency band, K. Song, P. T. Jayachandran, and K. Meziane, DASP Winter workshop, Fredericton, New Brunswick, February 2020.
Estimating the precipitable water vapor (PWV) over the high-latitude region, E. F. Gabr and P. T. Jayachandran, DASP Winter workshop, Fredericton, New Brunswick, February 2020.
Irregularity strength and intensity in the polar region, K. Meziane, A. Kaschechyev, S. Patra, and P. T. Jayachandran, DASP Winter workshop, Fredericton, New Brunswick, February 2020.
Performance assessment of low-cost dual frequency GNSS receivers in Space Weather applications, A. Kashcheyev, A. Farnham, T. Kelly, and P. T. Jayachandran, DASP Winter workshop, Fredericton, New Brunswick, February 2020.
A statistical look at the Fresnel Frequencies of ionospheric scintillation in the high-latitude region using a new piecewise fitting technique, E. Braden, A. McCaffrey, and P. T. Jayachandran, DASP Winter workshop, Fredericton, New Brunswick, February 2020.
A new CHAIN site in New Brunswick: low‐cost HF and GNSS instruments for Solar Eclipse 2024, A. Farnham, A. Kashcheyev, and P. T. Jayachandran, HanSCI Workshop: The auroral connection, Scranton, PA, March 2020.

2019

Determination and analysis of the refractive contribution to GPS phase “scintillation”, A. McCaffrey and P. T. Jayachandran, National Radio Science Meeting, Boulder, CO, January 2019.
Low cost instruments for ionospheric studies: A feasible alternative? A. Kashcheyev, P. T. Jayachandran, O. Charkina, and A. Sopin, DASP Workshop, Saskatoon, Canada, February 2019.
Probability density distribution signatures on high-latitude ionospheric scintillation, K. Meziane, A. Kashcheyev, S. Patra, and P. T. Jayachandran, DASP Workshop, Saskatoon, Canada, February 2019.
Ionospheric data assimilation using ECHAIM, B. Reid, D. R. Themens, and P. T. Jayachandran, DASP Workshop, Saskatoon, Canada, February 2019.
Validation and improvement of the E-CHAIM topside using in situ measurements, D. R. Themens and P. T. Jayachandran, DASP Workshop, Saskatoon, Canada, February 2019.
Equatorial ionospheric irregularities during daytime using ground and space based measurements, A. Seif and P. T. Jayachandran, DASP Workshop, Saskatoon, Canada, February 2019.
Statistical analysis of high latitude scintillation using CHAIN data during the 24th solar cycle, A. Kashcheyev, S. Patra, K. Meziane, and P. T. Jayachandran, CEDAR Workshop, Santa Fe, USA, June 2019.
How scintillating is scintillation? P. T. Jayachandran, URSI-AP-RASC, New Delhi, India, March 2019.
Examining the performance of the Empirical Canadian High Arctic Ionospheric Model (E-CHAIM) topside using CHAMP and DMSP, Themens, D.R., P.T. Jayachandran, B. Reid, and A.M. McCaffrey, International Union of Geodesy and Geophysics (IUGG) 2019 General Assembly, Montreal, Canada, July 2019.
Temporal and Spatial Variation of GPS TEC and Phase Scintillation during Substorms and Auroral Breakups, Paul Prikryl, James M. Weygand, Reza Ghoddousi-Fard, P. Thayyil Jayachandran, David R. Themens, Anthony M. McCaffrey, Bharat S. R. Kunduri, Emma Spanswick, Yongliang Zhang, 27th General Assembly of the International Union of Geodesy and Geophysics, Montreal, Canada, July 2019.
Understanding Multi-Scale ionospheric structuring processes in the polar ionosphere using GNSS measurements alone, P. T. Jayachandran (Invited), AOGS General Assembly, Singapore, August 2019.
Polar cap scintillation producing irregularities associated with patches and auroral forms, P. T. Jayachandran (invited), AOGS General Assembly, Singapore, August 2019.
The polar ionospheric large scale structures and dynamics revealed by the TEC keogram extracted from TEC maps, Y. Wang, Q.-H. Zhang, Z. Y. Zing, and P. T. Jayachandran, AOGS General Assembly, Singapore, August 2019.
Polar cap scintillation producing irregularities, P. T. Jayachandran, Y. Wang, A. McCaffrey, B. Reid, C. Watson, and D. R. Themens, International Beacon Satellite Symposium, Olsztyn, Poland, August 2019.
Solar Activity drivers in empirical ionospheric models: Validating E-CHAIM and exploring intermediate timescales in the high latitude topside, D. R. Themens, P. T. Jayachandran, B. Reid, and A. M. McCaffrey, International Beacon Satellite Symposium, Olsztyn, Poland, August 2019.
To what extent can E-CHAIM be used as a model of total electron content?, D. R. Themens, P. T. Jayachandran, D. Reid, and A. M. McCaffrey, International Beacon Satellite Symposium, Olsztyn, Poland, August 2019.
Near-real-time data assimilation of the high latitude ionosphere, B. Reid, D. R. Themens, and P. T. Jayachandran, International Beacon Satellite Symposium, Olsztyn, Poland, August 2019.
Development of a GUVI/SSUSI-based model for E-region electron density enhancements at northern auroral latitudes, C. Watson, D. R. Themens, and P. T. Jayachandran, International Beacon Satellite Symposium, Olsztyn, Poland, August 2019.
The probability distribution of the high-latitude scintillation indices during the solar cycle, K. Meziane, A. Kaschechyev, S. Patra, and P. T. Jayachandran, International Beacon Satellite Symposium, Olsztyn, Poland, August 2019.
Improvements to modeling the high latitude topside: Storms, Solar activity, and where to go from here?, Workshop on the NeQuick Ionospheric Electron Density Model: Latest Developments and New Implementations, Trieste, Italy, October 2019.
Things to look forward to in Version 2.0 of the Empirical Canadian High Arctic Ionospheric Model (E-CHAIM), D. R. Themens, B. Reid, A. M.McCaffrey, and P. T. Jayachandran, AGU Fall meeting, San Francisco, December 2019.
GPS TEC and Phase Variations during Substorms and Auroral Breakups, Prikryl, P., Weygand, J. M., Ghoddousi-Fard, R., Jayachandran, P. T., Themens, D. R., McCaffrey, A. M, AGU Fall meeting, San Francisco, December 2019.
Impact of high-latitude ionospheric structures on aviation systems, P. T. Jayachandran (invited), AGU Fall meeting, San Francisco, December 2019.
Development of a GUVI/SSUSI-based model for E-region electron density enhancements at northern auroral latitudes, C. Watson, D. R. Themens, and P. T. Jayachandran, AGU Fall meeting, San Francisco, December 2019.
The response time of the ionosphere to solar wind driving from the scintillation perspective, S. Patra, D. Rout, A. Kashcheyev, K. Meziane, P. T. Jayachandran, AGU Fall meeting, San Francisco, December 2019.
High Latitude Climatology of the Phase and Amplitude Fluctuations in GPS Signals, A. Kashcheyev, K. Meziane, S. Patra, P. T. Jayachandran, AGU Fall meeting, San Francisco, December 2019.
Assimilative Canadian High Arctic Ionospheric Model (A-CHAIM), B. Reid, D. R. Themens, and P. T. Jayachandran, AGU Fall meeting, San Francisco, December 2019.

2018

A Bottomside Profile Function for the Empirical Canadian High Arctic Ionospheric Model (ECHAIM), Themens, D.R, and P.T. Jayachandran, 2018 URSI Atlantic Radio Science Conference, Maspalomas, Spain, June 2018.
Ionospheric Storm Variability in the Empirical Canadian High Arctic Ionospheric Model (ECHAIM), Themens, D, and P.T. Jayachandran, 2018 URSI Atlantic Radio Science Conference, Maspalomas, Spain, June 2018.
Polar region scintillation research in the GPS era – What went wrong in the last several years?, P. T. Jayachandran and A. McCaffrey, 2018 URSI Atlantic Radio Science Conference, Maspalomas, Spain, June 2018.
On the accuracy of the GPS L2 observable for ionospheric monitoring, A. McCaffrey and P. T. Jayachandran, 2018 URSI Atlantic Radio Science Conference, Maspalomas, Spain, June 2018.
Polar region Scintillation studies in the GPS era – What went wrong in the last 10 years? P. T. Jayachandran and A. McCaffrey, POLAR2018, Davos, Switzerland, June 2018.
Exploring the use of the Empirical Canadian High Arctic Ionospheric Model (E-CHAIM) and other empirical ionospheric electron density models at high latitudes, Themens, D.R., and P.T. Jayachandran, 2018 Canadian Association of Physicists Congress held in Halifax, Nova Scotia, June 2018.
Generation, dynamics, and decay of a polar cap patch and associated GPS signal scintillation, P. T. Jayachandran (Solicited), A. McCaffrey, Y. Wang, D. R. Themens, B. Reid, Q.-H. Zhang, and Z.-Y. Xing, 2018 COSPAR General Assembly, Pasadena, California, USA, July 2018.
Polar cap structures and dynamics revealed by TEC keograms extracted from TEC maps, Y. Wang, Q.-H. Zhang, Y.-Z. Ma, P. T. Jayachandran, Z.-Y. Xing, and S. Zhang, 2018 COSPAR General Assembly, Pasadena, California, USA, July 2018.
Completed 3D ionospheric electron density model for the use at high latitudes, D. R. Themens and P. T. Jayachandran, 2018 COSPAR General Assembly, Pasadena, California, USA, July 2018.
An attempt to predict scintillations across the polar cap using in-situ electron density measurements and GNSS receivers". S Patra, P. T Jayachandran, and J. Moen - AGU Fall Meeting, Washington, DC, December 2018.
Polar cap scintillation producing irregularities associated with patches and auroral forms, P. T. Jayachandran, A. McCaffrey, C. Flynn, Y. Wang, D. R. Themens, and B. Reid, AGU Fall meeting, Washington, DC, December 2018.
TEC variations and scintillation associated with ionospheric sporadic E layers over the polar region, Y. Wang, P. T. Jayachandran, D. R. Themens, S. David, R. Chadwick, and Q-.H. Zhang, AGU Fall meeting, Washington, DC, December 2018.
Global characteristics of Sporadic E using GNSS Occultation, A. Seif and P. T. Jayachandran, AGU Fall meeting, Washington, DC, December 2018.
Pushing the limits of the Empirical Canadian High Arctic Ionospheric Model (ECHAIM) – How far can empirical models get us? D. R. Themens and P. T. Jayachandran, AGU Fall meeting, Washington, DC, December 2018.
Code interference in GPS observable and implications in GPS accuracy, precision, and applications, C. D. Flynn, A. McCaffrey, and P. T. Jayachandran, AGU Fall meeting, Washington, DC, December 2018.
Temporal and spatial development of vTEC enhancements during substorms, J. M. Weygand, S. Wing, R. J. Redmon, P. T. Jayachandran, and M. Kivelson, AGU Fall meeting, Washington, DC, December 2018.

2017

The Empirical Canadian High Arctic Ionospheric Model (E-CHAIM): NmF2 and hmF2 specification, Themens D. R., and P. T. Jayachandran, European Geophysical Union Scientific Assembly, Vienna, Austria, April 2017.
Examining the use of the NeQuick bottomside and topside parameterizations at high latitudes, Themens, D. R., and P. T. Jayachandran, European Geophysical Union Scientific Assembly, Vienna, Austria, April 2017.
A high latitude topside electron density representation for the Empirical Canadian High Arctic Ionospheric Model (E-CHAIM), Themens D. R., and P. T. Jayachandran, International Ionospheric Effects Symposium, Alexandria, Virginia, USA, April 2017.
The Empirical Canadian High Arctic Ionospheric Model (E-CHAIM): Peak Density, Themens D. R., and P. T. Jayachandran, International Ionospheric Effects Symposium, Alexandria, Virginia, USA, April 2017.
High Rate Total Electron Content Fluctuations Observed in the Canadian Auroral Region, McCaffrey, A. and P. T. Jayachandran, International Ionospheric Effects Symposium, Alexandria, Virginia, USA, April 2017.

2016

High rate total electron content fluctuations observed in the Canadian auroral region, A. McCaffrey and P. T. Jayachandran, CAP Congress, Ottawa, ON, June 2016.
A neural network based foF2 model for a single station in the polar cap, R. Athieno, and P. T. Jayachandran, CAP congress, Ottawa, ON, June 2016.
The empirical Canadian High Arctic ionospheric model (E-CHAIM): NmF2 and hmF2 specification, D. Themens and P. T. Jayachandran, CAP Congress, Ottawa, ON, June 2016
Dynamic analysis of the polar ionosphere during scintillation: towards an optimization of the detrending frequency, H. Mezaoui, A. M. Hamza, and P. T. Jayachandran, CAP Congress, Ottawa, ON, June 2016.
The Empirical Canadian High Arctic Ionospheric Model (E-CHAIM): NmF2 and hmF2 specification, Themens, D. R., and P. T. Jayachandran, Canadian Association of Physicists Congress, Ottawa, Canada. June 2016.
A Neural Network foF2 model for a single station in the polar cap, Athieno, R., P. T. Jayachandran, and D. R. Themens, Canadian Association of Physicists congress, Ottawa, ON, June 2016
High Rate Total Electron Content Fluctuations Observed in the Canadian Auroral Region, McCaffrey, A., and P. T. Jayachandran, Canadian Association of Physicists congress, Ottawa, ON, June 2016

2015

GPS Differential Receiver Biases in the Polar Cap Region: Investigating the nature of bias variability, Themens, D.R., P.T. Jayachandran, R.B. Langley, and M.J. Nicolls, Measurement Techniques in Solar and Space Physics, Boulder, Colorado, USA, April 2015.
Expanded Canadian High Arctic Network (ECHAIN): Science and Applications, P. T. Jayachandran et al., Measurement Techniques in Solar and Space Physics, Boulder, Colorado, USA, April 2015.
Characteristics of GPS TEC Variations in the Polar Cap Ionosphere, Watson, C., P.T. Jayachandran, and J.W. MacDougall, Measurement Techniques in Solar and Space Physics, Boulder, Colorado, USA, April 2015.
High-Latitude GPS Scintillation, Exploring Canstaing Distribution, H Mezaoui, A. M. Hamza, and P. T. Jayachandran, Measurement Techniques in Solar and Space Physics, Boulder, Colorado, USA, April 2015.
The use of single station GPS receiver bias estimation techniques in the Polar Cap and Auroral Oval regions, Themens, D.R., P.T. Jayachandran, and R.B. Langley, URSI Atlantic Radio Science Conference, Maspalomas, Spain, May 2015.
The nature of GPS receiver bias variabilities: An investigation in the Polar Cap region and comparison to incoherent scatter radar, Themens, D.R., P.T. Jayachandran, R.B. Langley, and M.J. Nicolls, URSI Atlantic Radio Science Conference, Maspalomas, Spain. May 2015.
Generation, dynamics, and decay of a polar cap patch, P. T. Jayachandran, K. Hosokawa, K. Shiokawa, C. Watson, D. R. Themens, J. W. MacDougall, and P. Prikryl, CAP Congress, Edmonton, Alberta, June 2015.
Multifractal analysis of Ionospheric scintillation at high latitude using GPS signal, H. Mezaoui, A. M. Hamza, and P. T. Jayachandran, CAP congress, Edmonton, Alberta, June 2015.
Analysis of Co-located IGS network GPS receiver DCBs derrived from CODE and single station estimation method, A. McCaffrey, P. T. Jayachandran, and D. R. Themens, CAP congress, Edmonton, Alberta, 2015
The nature of GPS receiver bias variabilities: An examination in the polar cap region and comparison to incoherent scatter radar, D. R. Themens, P. T. Jayachandran, R. B. Langley, and M. J. Nicolls, CAP congress, Edmonton, Alberta, June 2015.

2014

Empirical model in the characterization of Hi-Frequency (HF) propagation in the Arctic Region, R. Athieno and P. T. Jayachandran, DASP Winter workshop, Fredericton, NB, February 2014.
Variations in GPS total electron content associated with field line resonance activity in the early morning auroral ionosphere, C. Watson, P. T. Jayachandran, H. J. Singer, R. J. Redmon, and D. W. Danskin , DASP Winter workshop, Fredericton, NB, February 2014.
A top to bottom evaluation of IRI-2007 within the polar cap, D. R. Themens, P. T. Jayachandran, M. J. Nicolls, and J. W. MacDougall, DASP Winter workshop, Fredericton, NB, February 2014.
Characterization of the ionospheric scintillation at high latitude using GPS signal, H. Mezaoui, A. M. Hamza, and P. T. Jayachandran, DASP Winter workshop, Fredericton, NB, February 2014.
On the relation between auroral "scintillation" and "Phase without amplitude" scintillation: Initial Investigations, S. Mushini, E. Donovan, P. T. Jayachandran, R. Langley, P. Prikryl, and E. Spanswick, DASP Winter workshop, Fredericton, NB, February 2014.
Receiver DCB estimation for Septentrio PolarXs Pro receivers in the high latitude region, A. McCaffrey, D. Themens, and P. T. Jayachandran, DASP Winter workshop, Fredericton, NB, February 2014.
GNSS phase scintillation and cycle slips at high latitudes observed under varying solar wind conditions, P. Prikryl, R. Ghoddousi-Fard, P. T. Jayachandran, R. Chadwick, and T. Kelly, DASP Winter workshop, Fredericton, NB, February 2014.

2013

GPS phase scintillation and proxy index at high-latitudes: A case study, P. Prikryl, R. Ghoddousi-Fard, S. R. Kunduri, E. G. Thomas, A. J. Coster, P. T. Jayachandran, E. Spanswick, D. W. Danskin, DASP Winter Workshop, Kingston, ON, February 2013.
Characteristics of GPS TEC variations in the polar cap ionosphere, C. Watson, P. T. Jayachandran, and J. W. MacDougall, DASP Winter workshop, Kingston, ON, February 2013.
Monitoring and forecasting ionospheric scintillation at high-latitudes, P. Prikryl, P. T. Jayachandran, R. Chadwick, and T. Kelly, AGU Fall Meeting, San Francisco, USA, December 2013.
GPS amplitude and phase scintillation associated with poleward moving sun aligned arcs, P. T. Jayachandran, K. Hosokawa, K. Shiokawa, Y. Otsuka, S. C. Mushini, C. Watson, J. W. MacDougall, P. Prikryl, R. Chadwick, AGU Fall Meeting, San Francisco, USA, December 2013.
Characterization of the ionospheric scintillations at high-latitudes using GPS signal, H. Mezaoui, A. M. Hamza, and P. T. Jayachandran, AGU Fall Meeting, San Francisco, USA, December 2013.
Simultaneous observations of Pc5 magnetic field pulsations and associated GPS TEC variations in the auroral ionosphere, C. Watson, P. T. Jayachandran, H. J. Singer, R. J. Redmon, and D. W. Danskin, AGU Fall Meeting, San Francisco, USA, December 2013.
A top to bottom evaluation of IRI-2007 within the polar cap, D. R. Themens, P. T. Jayachandran, J. W. MacDougall, and M. J. Nicolls, AGU Fall Meeting, San Francisco, USA, December 2013.
Generation, dynamics, and decay of a polar cap patch, J. W. MacDougall, P. T. Jayachandran, K. Hosokawa, K. Shiokawa, C. Watson, D. R. Themens, and P. Prikryl, AGU Fall Meeting, San Francisco, USA, December 2013.
High-latitude ionospheric imaging using Canadian High Arctic Ionospheric Network (CHAIN), K. Meziane, P. T. Jayachandran, A. M. Hamza, and J. W. MacDougall, AGU Fall Meeting, San Francisco, USA, December 2013.

2012

GPS TEC variations associated with polar cap arcs, 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, EGU General Assembly, Vienna, Austria, April 2012.
An unusual strolling motion of polar cap patches: an implication of the inference of tail reconnection on the nightside polar cap convection, K. Hosokawa, J. I. Moen, P. T. Jayachandran, K. Shiokawa, and Y. Ostuka, EGU General Assembly, Vienna, Austria, April 2012.
GPS TEC variations associated with polar cap arcs, 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, COSPAR Scientific Assembly, Mysore, India, July 2012.
GPS Amplitude and phase scintillations associated with poleward moving auroral forms, P. T. Jayachandran, K. Hosokowa, K. Shiokawa, Y. Otsuka, S. C. Mushini, C. Watson, J. W. MacDougall, P. Prikryl, R. Chadwick, and T. D. Kelly, COSPAR Scientific Assembly, Mysore, India, July 2012 (invited).
MLT distribution and frequency statistics of TEC variations in the polar cap ionosphere, C. Watson and P. T. Jayachandran, COSPAR Scientific Assembly, Mysore, India, July, 2012.
Power spectral analysis of high latitude GPS scintillations observed during solar minimum conditions, S. C. Mushini, P. T. Jayachandran, R. B. Langley, and J. W. MacDougall, COSPAR Scientific Assembly, Mysore, India, July 2012.
Towards Forecasting of GPS phase scintillation in the high-latitude ionosphere, P. Prikryl, P. T. Jayachandran, S. C. Mushini, and I. G. Richardson, AGU Fall Meeting, San Francisco, USA, December, 2012.
SuperDARN Cross Polar Cap Potential: Correlation with the IMF and Solar wind parameters, D. Mori, A. V. Koustov, K. Colville, P. T. Jayachandran, AGU Fall Meeting, San Francisco, USA, December, 2012.
Polar cap GPS scintillation associated with auroral forms, P. T. Jayachandran, K. Hosokowa, K. Shiokawa, S. Mushin, C. Watson, T. Kelley, R. Chadwick, and P. Prikryl, DASP Winter Workshop, Kingston, ON, February 2012.

2011

GPS phase scintillation at high latitudes following near-earth interplanetary coronal mass ejections, P. Prikryl, I. G. Richardson, P. T. Jayachandran, and S. C. Mushini, EGU General assembly, Vienna, Austrial, April 2011.
High latitude TEC changes associated with sudden magnetospheric compression, P. T. Jayachandran, C. Watson, I. J. Rae, K. Mezianne, J. W. MacDougall, D. W. Dnaskin, R. Chadwick, T. D. Kelley, and P. Prikryl, DASP Winter workshop, Saskatoon, February 2011.
Climatology of amplitude and phase scintillations for high-latitude region during solar minimum, S. C. Mushini, P. T. Jayachandran, R. B. Langley, and J. W. MacDougall, DASP Winter workshop, Saskatoon, February 2011.
Compartive study of GPS TEC and riometer absorption during absorption events in the polar ionosphere, C. Watson, P. T. Jayachandran, D. W. Danskin, and J. W. MacDougall, DASP Winter workshop, Saskatoon, February 2011.
GPS phase scintillation at high latitudes following near-earth interplanetary coronal mass ejections, P. Prikryl, I. G. Richarson, P. T. Jayachandran and S. C. Mushini, DASP Winter workshop, Saskatoon, February 2011.
Equatorial traveling ionospheric disturbances (TIDs) compared with mid-latitude TIDs, J. W. MacDougall, M. A. Abdu, I. S. Batista, and P. T. Jayachandran, DASP Winter workshop, Saskatoon, February 2011.
Spectral width of PolarDARN echoes, A. V. Koustov, S. Toderian, and P. T. Jayachandran, DASP Winter workshop, Saskatoon, February 2011.
PolarDARN velocities: Are they consistent with SuperDARN and CADI measurments? D. Mori, S. Toderian, A. V. Koustov, P. T. Jayachandran, DASP Winter workshop, Saskatoon, February 2011.
Climatology of amplitude and phase scintillations for the high-latitude region during solar minimum, S. C. Mushini, P. T. Jayachandran, R. B. Langley, and J. W. MacDougall, Ionospheric Effects Symposium, Alexandia, Virginia, USA, May 2011.
Determining receiver biases in GPS derived TEC in the auroral oval and polar cap region using ionosonde measurements, D. R. Themens, P. T. Jayachandran, R. B. Langley, J. W. MacDougall, and M. J. Nicolls, Ionospheric Effects Symposium, Alexandia, Virginia, USA, May 2011.
Canadian High Arctic Ionospheric Network - Overview and recent scientific results, P. T. Jayachandran, AOGOS2011, Taipei, August 2011 (Invited).
GPS phase scintillation and HF radar backscatter occurrence in the high-latitude ionosphere, P. Prikryl, P. T. Jayachandran, S. C. Mushini, and R. Chadwick, URSI General Assembly, Istanbul, Turkey, August 2011.
Determining receiver biases in GPS derived TEC in the auroral oval and polar cap region using ionosonde measurements, D. R. Themens, P. T. Jayachandran, R. B. Langley, J. W. MacDougall, and M. J. Nicolls, URSI General Assembly, Istanbul, Turkey, August 2011.
High latitude TEC changes associated with sudden magnetospheric compression, P. T. Jayachandran, C. Watson, I. J. Rae, K. Mezianne, J. W. MacDougall, D. W. Danskin, R. Chadwick, T. D. Kelley, and P. Prikryl, URSI General Assembly, Istanbul, Turkey, August 2011.
Compartive study of GPS TEC and riometer absorption during absorption events in the polar ionosphere, C. Watson, P. T. Jayachandran, D. W. Danskin, and J. W. MacDougall, URSI General Assembly, Istanbul, Turkey, August 2011.
Equatorial traveling ionospheric disturbances (TIDs) compared with mid-latitudes TIDs, J. W. MacDougall, M. A Abdu, I. Batista, P. T. Jayachandran, and R. Buriti, URSI General Assembly, Istanbul, Turkey, August 2011.
Dynamics of the equatorward boundary of the ion auroral oval: Radar observations, P. T. Jayachandran, Mid-latitude HF radar workshop, STEL, Nagoya University, October 2011.
High latitude TEC changes associated with sudden magnetospheric compression, P. T. Jayachandran, C. Watson, I. J. Rae, K. Meziane, J. W. MacDougall, D. W. Dnaskin, R. Chadwick, T. D. Kelley, and P. Prikryl, The second symposium on polar sciences, National Institute of Polar Research, Japan, November 2011.
Towards forecasting of GPS phase scintillation in the high-latitude region, P. Prikryl, P. T. Jayachandran, S. C. Mushini, and I. G. Richardson, American Geophysical Union Fall meeting, San Francisco, USA, December 2011.
GPS Phase scintillation caused by conjugate auroras, P. Prikryl, P. T. Jayachandran, C. N. Mitchell, A. T. Weatherwax, D. W. Danskin, and L. Spogli, American Geophysical Union Fall meeting, San Francisco, USA, December 2011.
Effect of grid definition and data distribution on accuracy of ionospheric imaging, R. Burston and P. T. Jayachandran, American Geophysical Union Fall meeting, San Francisco, USA, December 2011.
SuperDARN cross-polar cap potential correlation with the IMF and solar wind parameters, D. Mori, A. V. Koustov, K. Colville, and P. T. Jayachandran, American Geophysical Union Fall meeting, San Francisco, USA, December 2011.

2010

GPS total electron content observation of the evolution of substorm particle injection, C. W. Watson, P. T. Jayachandran, E. Spanswick, E. F. Donovan, and D. W. Danskin, ICS-10, San Luis Obispo, California, USA, March 2010.
Climatology of GPS ionospheric TEC, scintillation and HF radar backscatter at high latitudes for solar minimum conditions, P. Prikryl, P. T. Jayachandran, S. C. Mushini, R. Chadwick, and D. Pokhotelov, EGU General assembly, Vienna, Austria, May 2010.
Canadian High Arctic Ionosphere – Early Results, P. T. Jayachandran et al., CAP congress, Toronto, June 2010.
GPS total electron content observation of the evolution of substorm particle injection, C. W. Watson, P. T. Jayachandran, E. Spanswick, E. F. Donovan, and D. W. Danskin, CAP congress, Toronto, June 2010.
Effects of geomagnetic storms in the polar cap ionosphere sensed by GPS receivers, digital ionosondes, and LEO satellites, D. Pokhotelov, P. T. Jayachandran, C. N. Mitchell, and J. W. MacDougall, CAP congress, Toronto, June 2010.
Travelling ionospheric disturbances from terminator sources, J. W. MacDougall and P. T. Jayachandran, CAP congress, Toronto, June 2010.
SuperDARN cross polar cap potential and CADI resolute bay velocity, D. Mori, S. Knoustov, and P. T. Jayachandran, CAP congress, Toronto, June 2010.
Improved amplitude and phase scintillation indices derived from wavelet detrended high latitude GPS data, S. Mushini, P. T. Jayachandran, R. B. Langley, J. W. MacDougall., and D. Pokhotelov, International Beacon Satellite Symposium, Barcelona, Spain, June 2010.
Ellipitical model for cutoff boundaries for the solar energetic particles, A. V. Dimitriev, P.T. Jayachandran, and L.-C. Tsay, AOGS meeting, India, July 2010.
GPS TEC Variations associated with a polar cap arc, P. T. Jayachandran, K. Hosokawa, S. C. Mushini, J. W. MacDougall, R. B. Langley, and K. Shiokawa, COSPAR General assembly, Bremen, Germany, July 2010.
Examination of propagation of traveling ionospheric disturbances from terminator sources, J. W. MacDougall, C. Scotto, and P. T. Jayachandran, COSPAR General assembly, Bremen, Germanry, July 2010.
Correlation between airglow emissions at a high latitude arctic station: Interpretation of observations with the PEARL all sky imager (PASI), W. E. Ward, T. Xie, and P. T. Jayachandran, COSPAR general assembly, Bremen, Germany, July 2010.
GPS phase scitnilaltion in the cusp and in the nightside auroral oval: Why are they different, P. Prikryl, P. T. Jayachandran, S. C. Mushini, E. Donovan, and E. Spanswick, AGU Meeting of the Americas, Brazil, August, 2010.
First comparative scintillation study using arctic and Antarctic GPS receiver arrays, P. Prikryl, L. Spogli, L. Alfonsi, P. T. Jayachandran, and C. N. Mitchell, SCAR Open science conference, Buenos Aires, Argentina, August, 2010.
Climatology of GPS phase scintillation and HF radar backscatter for the high-latitude ionosphere under solar minimum conditions, P. Prikryl, P. T. Jayachandran, S. C. Mushini, R. Chadwick, AGU Fall meeting, San Francisco, USA, December 2010.

2009

Polar Cap patches: Primary source of HF radar backscatter and scintillation causing irregularities in the polar ionosphere, P. Prikryl, P. T. Jayachandran, J. W. MacDougall, J.-P. St-Maurice, and T. R. Pederson, DASP Winter workshop, Banff, Canada, February 2009
Ionospheric response to the geomagnetic storms as seen by digital ionosondes and GPS receivers, D. Pokhotelov, P. T. Jayachandran, J. W. MacDougall, and C. N. Mitchell, DASP Winter workshop, Banff, Canada, February 2009
Total electron content and scintillation associated with magnetospheric impulse events, P. T. Jayachandran, R. B. Langley, J. W. MacDougall, S. C. Mushini, D. Pokhotelov, A. M. Hamza, I. R.Mann, D.K.Milling, Z. C. Kale, R. Chadwick, T. Kelly, and D. W. Danskin, DASP Winter workshop, Banff, Canada, February 2009
Comparison of two phase scintillation estimators for GPS data obtained from high latitudes, S. C. Mushini, P. T. Jayachandran, R. B. Langley, and J. W. MacDougall, DASP Winter workshop, Banff, Canada, February 2009
Survey of magnetic pulsations at geosynchronous orbits, C. Watson, and P. T. Jayachandran, DASP winter workshop, Banff, Canada, February 2009
Ionosperic scintillation observed with the Canadian High Arctic Ionospheric Network, P. Prikryl, P. T. Jayachandran, J. W. MacDougall, J.-P.St-Maurice, and T. R. Pederson, EGU General Assembly, Vienna, Austrial, April, 2009
Canadian High Arctic Ionospheric Network, P. T. Jayachandran, Symposium on the polar cusp and cap ionosphere, Oslo, Norway, April, 2009
Canadian High Arctic Ionospheric Network, P. T. Jayachandran, et al., AGU Spring Meeting, Toronto, Canada, June 2009
Survey of geomagnetic pulsation at geosynchronous orbits, C. Watson, and P. T. Jayachandran, AGU Spring meeting, Toronto, Canada, June 2009
Comparison of two phase scintillation estimators for GPS data obtained from high latitudes, S. C. Mushini, P. T. Jayachandran, R. B. Langley, and J. W. MacDougall, AGU Spring meeting, Toronto, Canada, June 2009
Ionospheric anomalies in the polar cap and at mid latitudes revealed by digital ionosonde and GPS receivers, D. Pokhotelov, P. T. Jayachandran, J. W. MacDougall, and C. N. Mitchell, AGU Spring meeting, Toronto, Canada, June 2009

2008

Oscillation of the equatorward boundary of the ion auroral oval: radar observations, P. T. Jayachandran, N. Sato, Y. Ebihara, Y. S. Yukimatu, A. Kadokura, J. W. MacDougall, and K. Liou, DASP winter workshop, Fredericton, February 2008
Validation of the CHAMP radio occultation data using CADI in the polar region, S. Sadighi, P. T. Jayachandran, N. Jakowski, and J. W. MacDougall, DASP winter workshop, Fredericton, February 2008
Use of varying shell heights derived from ionosonde data in calculating total electron content (TEC) using GPS- new method, S. C. Mushini, P. T. Jayachandran, R. B. Langley, J. W. MacDougall., DASP winter workshop, Fredericton, February 2008
Canadian High Arctic Ionospheric Network, P. T. Jayachandran, R. B. Langley, and J. W. MacDougall, IES2008, Alexandria, Virginia, USA, May 2008
Azimuthal propagation of dipolarization fronts at geosynchronous orbits, C. W. Watson and P. T. Jayachandran, International Conference on substorms, Graz. Austria, May 2008
Validation of the CHAMP radio occultation measurements with Canadian Advanced Digital Ionosonde measurements for the polar region, S. Sadighi, P. T. Jayachandran, N. Jakowski, and J. W. MacDougall, COSPAR General Assembly, Motreal, Canada, June 2008
Use of varying shell heights derived from ionosonde data in calculating vertical total electron content (TEC) using GPS – New method, S. C. Mushini, P. T. Jayachandran, R. B. Langley, and J. W. MacDougall, COSPAR General Assembly, Montreal, Canada, June 2008
Oscillation of the equatorward boundary of the ion auroral oval: Radar observations, P. T. Jayachandran, N. Sato, Y. Ebihara, A. S. Yikmatu, A. Kadokura, J. W. MacDougall, and K. Liou, COSPAR General Assembly, Montreal, Canada, June 2008
Azimuthal propagation of dipolarization fronts at geosynchronous orbits, C. Watson, and P. T. Jayachandran, COSPAR General Assembly, Montreal, Canada, June 2008
Validation of the CHAMP radio occultation measurements with Canadian Advanced Digital Ionosonde measurements for the polar region, S. Sadighi, P. T. Jayachandran, N. Jakowski, and J. W. MacDougall, URSI General Assembly, Chicago, USA, August, 2008
Use of varying shell heights derived from ionosonde data in calculating vertical total electron content (TEC) using GPS – New method, S. C. Mushini, P. T. Jayachandran, R. B. Langley, and J. W. MacDougall, URSI General Assembly, Chicago, USA, August 2008

2007

Polar patches, J. W. MacDougall, and P. T. Jayachandran, EGU General Assembly, Vienna, Austria, April 2007
Observation of dipolarization and its response in the polar cap convection, P. T. Jayachandran, J. W. MacDougall, A. M. Hamza, and M. G. Henderson, CAP Congress, Saskatoon, June 2007
Canadian High-Arctic Ionopsheric Network, P. T. Jayachandran, R. B. Langley, A. M. Hamza, and J. W. MacDougall, URSI North American Meeting, Ottawa, July 2007

2006

NORSTAR Observations ,Eric Donovan, Brian Jackel, Trond Trondsen, Emma Spanswick, Mikko Syrjasuo, Igor Voronkov, Noora Partamies, Leroy Cogger, David Knudsen, Hercules Olivier, Zane Kryzanowsky, P. T. Jayachandran, DASP Winter workshop, Kingston, February, 2006
Dynamics of the equatorward boundary of the ion auroral oval associated with substorms, P. T. Jayachandran, J. W. MacDougall., and E. F. Donovan, DASP winter workshop, Kingston, February, 2006
Polar Cap voltage saturation, J. W. MacDougall and P. T. Jayachandran, DASP winter workshop, Kingston, February, 2006
Ground-based radar detection of the equatorward boundary of ion auroral oval in the dusk-midnight sector and its dynamical association with substorms, P. T. Jayachandran, J. W. MacDougall, and E. F. Donovan, International Conference on Substorms, Calgary, March 2006
NORSTAR and Themis, Brian Jackel, Eric Donovan, Trond Trondsen, Emma Spanswick, Mikko Syrjasuo, Igor Voronkov, Noora Partamies, P. T. Jayachandran, Leroy Cogger, Fokke Creutzberg, Don Wallis, David Knudsen, Hercules Olivier, and Zane Kryzanowsky, International Conference on Substorms, Calgary, March 2006
Ground Based Radar Detection of the Inner Boundary of the Ion Plasma Sheet and its Response to the Changes in the Interplanetary Magnetic Field, P. T. Jayachandran, J. W. MacDougall, D. R. Moorcroft, E. F. Donovan, NATO IST-056 workshop, Alaska, USA, June 2006
Canadian High-Arctic Ionospheric Network, P. T. Jayachandran, R. B. Langley, J. W. MacDougall, A. M. Hamza, Y. Ebihara, and N. Sato, NIPR Symposium, Tokyo, Japan, August, 2006

2005

1.Substorm time scales from the polar cap convection measurements, P. T. Jayachandran, J.W. MacDougall, E. F. Donovan, and M. G. Henderson, DASP Winter workshop, Edmonton, February, 2005
Response of the equatorward boundary of the ion auroral oval to the changes in the interplanetary magnetic field, P. T. Jayachandran, E. F. Donovan, J. W. MacDougall, and D. R. Moorcroft, DASP Winter workshop, Edmonton, February, 2005
Polar patches, J. W. MacDougal, and P. T. Jayachandran, DASP Winter workshop, Edmonton, February, 2005
Ground-based radar determination of the equatorward boundary of the auroral oval and its geophysical implication, P. T. Jayachandran, National Institute for Polar Research Symposium, Japan, August 2005 (invited)
Canadian High-Arctic Ionospheric Network: A proposal, P. T. Jayachandran, R. B. Langley, J. W. MacDougall, A. M. Hamza, E. F. Donovan, et al., Space Environment Workshop, Sept. 2005, Saskatoon (invited)
Ground-Based radar determination of the equatorward boundary of the ion auroral oval and its response to the changes in the interplanetary magnetic field, P. T. Jayachandran, J. W. MacDougall., D. R. Moorcroft, and E. F. Donovan, URSI General Assembly, New Delhi, India, October 2005 (invited)
Polar Patches, J. W. MacDougall and P. T. Jayachandran, URSI General Assembly, New Delhi, India, October 2005
Polar Ionospheric Monitoring with CHAIN, P. T. Jayachandran et al., Ionopsheric Monitoring with GPS meeting, NRCan, Ottawa, November, 2005 (invited)

2004

Global and Local equatorward expansion of the ion auroral oval before substorm onsets,P.T. Jayachandran, E. F. Donovan, J. W. MacDougall, D. R. Moorcroft, J.-P. St-Maurice, K. Liou, and P. T. Newell, DASP Winter workshop, University of Western Ontario, London, Ontario, February, 2004
Global and Local equatorward expansion of the ion auroral oval before substorm onsets,P.T. Jayachandran, E. F. Donovan, J. W. MacDougall, D. R. Moorcroft, J.-P. St-Maurice, K. Liou, and P. T. Newell, AGU Spring meeting, Montreal, Canada, May 2004
Global and Local equatorward expansion of the ion auroral oval before substorm onsets,P.T. Jayachandran, E. F. Donovan, J. W. MacDougall, D. R. Moorcroft, J.-P. St-Maurice, K. Liou, and P. T. Newell, SuperDARN workshop, Saskaton, May 2004

2003

Substorm associated changes in the high-latitude ionospheric convection, P. T. Jayachandran, J. W. MacDougall, E. F. Donovan, J. M. Ruohoniemi, K. Liou, D. R. Moorcroft, and J. P. St-Maurice, SuperDARN Workshop, Kiljawa, Finland, May, 2003.

2002

SuperDARN E-region backscatter boundary in the dusk-midnight sector - Tracer of equatorward boundary of auroral oval, P. T. Jayachandran, E. F. Donovan, J. W. MacDougall, J.-P. St-Maurice, D. R. Moorcroft, and P. Prikryl, DASP workshop, University of New Brunswick, February 2002
Substorm onset location and the Equatorward boundary of the Proton auroral oval, P. T. Jayachandran, J. W. MacDougall, D. R. Moorcroft, J.-P. St-Maurice, K. Liou, and P. T. Newell, SuperDARN 2002 Workshop, Valdez, Alaska, USA, May 2002

2001

Motion of the Earthward limit of the current sheet in the dusk-midnight sector determined from SuperDARN and its association with the substorm onset, P. T. Jayachandran, J. W. MacDougall, J.-P. St-Maurice, D. R. Moorcroft, P. T. Newell and P. Prikryl, DASP workshop, University of Saskatoon, Saskatoon, February, 2001
Equatorward edge of the E region radar backscatter in the dusk-midnight sector - Significance and geo-physical implications, P. T. Jayachandran, J. W. MacDougall, J.-P. St-Maurice, D. R. Moorcroft, P. T. Newell and P. Prikryl, SuperDARN'01 Workshop, Venice, Italy, May 2001

2000

Discrepancy between Convection reversal boundary and open/closed field line boundary during a substorm - A case study, P. T. Jayachandran, J. W. MacDougall, J. P. St-Maurice and D. R. Moorcroft, DASP workshop, University of Toronto, Toronto, February, 2000
Dynamics of the substorm growth phase: Multi-instrument observations, P. T. Jayachandran, J. W. MacDougall, J.-P. St-Maurice, D. R. Moorcroft, P. T. Newell, P. Prikryl and F. Creutzberg, SuperDARN'00 Workshop, Victoria, Australia, May 2000

1999

Seasonal and IMF By effect on the central polar cap convection orientation, P. T. Jayachandran and J. W. MacDougall, DASP workshop, Baneff, Alberta, Canada, February, 1999
Low velocity auroral E-region backscatter- Multifrequency observations, P. T. Jayachandran, R. S. Kissack, J. W. MacDougall, J. P. St-Maurice and D. R. Moorcroft, DASP meeting, Baneff, Alberta, Canada, February, 1999
Low velocity auroral E-region Backscatter, P. T. Jayachandran, J. W. MacDougall, J. P. St-Maurice and D. R. Moorcroft, SuperDARN'99 workshop, Iceland, 23-28 May, 1999

1997

Ionosphere-Thermosphere coupling through equatorial ionization anomaly and equatorial Spread-F, P. V. S. Rama Rao and P. T. Jayachandran, IAGA General Assembly, Upsala, Sweden, August, 1997
Dynamics of the Equatorial and low latitude night-time F-region – Servo model approach, P. T. Jayachandran and P. V. S. Rama Rao, IAGA General Assembly, Upsala, Sweden, August, 1997

1996

Spread-F and scintillation-Possible causative mechanisms, P. V. S. Rama Rao, D. S. V. V. D. Prasad, P. T. Jayachandran and P. Sri Ram, STP Workshop, Hitachi, Japan, January 20-24, 1996
Nocturnal F-region vertical drift over Waltair, P. T. Jayachandran, P. Sri Ram and P. V. S. Rama Rao, National Space Science Symposium, Osmania University, Hyderabad, February 6-10, 1996
Ionospheric irregularities – role of equatorial ionization anomaly, P. V. S. Rama Rao, P. T. Jayachandran and P Sri Ram, Ionospheric Effects Symposium –™96, Alexandria, Virginia, May 7-9, 1996
Ionospheric electron content deduced from ionograms and its comparison with observations and models, P. V. S. Rama Rao, P. T. Jayachandran, P. Sri Ram and D. S. V. V. D. Prasad, Ionospheric Effects Symposium –™96, Alexandria, Virginia, May 7-9, 1996
Preliminary results of ionosonde measurements at Waltair during the total solar eclipse of 24 October 1995, P. V. S. Rama Rao, D. S. V. V. D. Prasad, P. Sri Ram and P. T. Jayachandran, Ionospheric Effects Symposium –™96, Alexandria, Virginia, May 7-9, 1996
Solar terminator effects on the equatorial and low latitude ionosphere, P. Sri Ram, P. V. S. Rama Rao, D. S. V. V. D. Prasad and P. T. Jayachandran, INCURSI, Calcutta, January 16-20, 1996.

1995

Seasonal variations in IEC and irregularities over Waltair – A comparison with SLIM model, P. V. S. Rama Rao, P. Sri Ram, P. T. Jayachandran and D. S. V. V. D. Prasad, International conference on IRI, NPL, New Delhi, January 9-14, 1995
The effect of E X B drift and neutral wind on the occurrence of Spread-F and scintillation over Waltair, P. T. Jayachandran, P. Sri Ram and P. V. S. Rama Rao, International Symposium On Equatorial Aeronomy, Bali, Indonesia, March 20-24, 1995
Nighttime sequential Sporadic-E layers at low latitudes and its associations with F-layer irregularities, P. T. Jayachandran, P. V. S. Rama Rao and V. V. Somayajulu, International Symposium On Equatorial Aeronomy, Bali, Indonesia, March 20-24, 1995
A method to obtain total electron content from bottom-side electron density profiles and its comparison with observed data and models, P. V. S. Rama Rao, P. T. Jayachandran, P. Sri Ram and D. S. V. V. D. Prasad, International Symposium On Equatorial Aeronomy, Bali, Indonesia, March 20-24, 1995
Comprehensive study of VHF scintillation over the Indian Sub continent, P. V. S. Rama Rao, P. Sri Ram and P. T. Jayachandran, IUGG General Assembly, Boulder, Colorado, June, 1995

1994

Variations in the height of F-layer and its relation with the occurrence of scintillation at low latitudes – A multistation study. P. V. S. Rama Rao, P. T. Jayachandran, P. Sri Ram and D. S. V. V. D. Prasad, International Beacon Satellite Symposium, Wales, U K, July, 1994
Characteristics of VHF radio wave scintillation over a solar cycle (1983-1993) at a low latitude station, Waltair, P. V. S. Rama Rao, P. T. Jayachandran and P. Sri Ram, International Beacon Satellite Symposium, Wales, U K, July, 1994
Ionospheric variability during magnetically quiet and disturbed conditions over Waltair (Dip 20oN), P. V. S. Rama Rao, P. T. Jayachandran and P. Sri Ram, International Beacon Satellite Symposium, Wales, U K, July, 1994
A case study on plasma bubble and BSS type of irregularities, P. V. S. Rama Rao, P. Sri Ram and P. T. Jayachandran, National Space Science Symposium, VSSC, Trivandrum, December 20-24, 1994
Amplitude scintillation beyond sunrise hours at three different low latitude stations, P. V. S Rama Rao, P. Sri Ram, P. T. Jayachandran and D. S. V. V. D. Prasad, National Space Science Symposium, VSSC, Trivandrum, December 20-24, 1994
Ionospheric disturbance dynamo – An experimental evidence from F-region virtual height variations at middle and low latitudes, V. V. Somayajulu, P. Wilkinson, P. T. Jayachandran and G. D. Vyas, STEP symposium, Sendai, Japan, June, 1994

1993

1.Evidence for the effect of sub-storm related transient electric field disturbances in the low latitude ionosphere, P. V. S. Rama Rao, P. T. Jayachandran and P. Sri Ram, IAGA General Assembly, Argentina, Aug. 8-20, 1993
Scintillation phenomena at equatorial and low latitude stations, P. V. S. Rama Rao, P. Sri Ram, P. T. Jayachandran and D. S. V. V. D Prasad, IAGA General Assembly, Argentina, Aug. 8-20, 1993
Equatorial and low latitude ionospheric phenomena as observed from the multistation scintillation studies, P. V. S. Rama Rao, P. Sri Ram, P. T. Jayachandran and D. S. V. V. D. Prasad, Ionospheric Effects Symposium, Virginia, May 4-6, 1993
Short and long term variations of IEC over Waltair, P. V. S. Rama Rao, P. Sri Ram and P. T Jayachandran, TENERP Symposium, Boulder, USA, June 22-24, 1993

1992

The effect of vertical ionization drift on the occurrence of Spread-F and Scintillation at equatorial and low latitudes, P. V. S. Rama Rao, P. Sri Ram and P. T. Jayachandran, International Beacon Satellite Symposium, USA, July 6-10, 1992
Multistation studies of VHF Scintillation from equator to low latitudes, P. V. S. Rama Rao, D. S. V. V. D. Prasad, P. Sri Ram and P. T. Jayachandran, International Beacon Satellite Symposium, USA, July 6-10, 1992
Simultaneous study of Spread-F and scintillation at Waltair during maximum solar epoch of 1990, P. V. S. Rama Rao, P. Sri Ram and P. T. Jayachandran, International Beacon Satellite Symposium, USA, July 6-10, 1992
Electrojet effect on the occurrence of daytime scintillation over Waltair, P. V. S. Rama Rao, B. V. Ramana Rao, P. Sri Ram and P. T. Jayachandran, IEEY Data organization and analysis workshop, Brazil, October, 1992
Preliminary observations and features of peculiar type of Sporadic-E observed at Waltair, P. V. S. Rama Rao, P. T. Jayachandran and P. Sri Ram, National Space Science Symposium, Physical Research Laboratory, Ahmedabad, march 11-14, 1992

P.T. Jayachandran

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