Journal Articles – Cyprus Ionospheric Research Group

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Evaluating Dynamic and Static GNSS-Derived PWV Metrics for Heavy Rainfall Characterization in Cyprus.

Despina Giannadaki, Christina Oikonomou, Haris Haralambous, Vassiliki Kotroni, Konstantinos Lagouvardos.

Relation of the PWV Evolution to Flash and Prolonged Rainfall: Preliminary Findings from 14 Events in Cyprus (submitted to SPIE).

Christos Giannaros; Antonis Bezes; Vassiliki Kotroni; Konstantinos Lagouvardos; Christina Oikonomou and Haris Haralambous.

Calibration and validation of a WRF-Hydro flood forecasting system for the Koiliaris basin, Crete. SPIE 2026 (accepted for publication in SPIE conference proceedings).

Despina Giannadaki; Christina Oikonomou; Haris Haralambous; Vassiliki Kotroni; Konstantinos Lagouvardos.

From historical flood impacts analysis to GNSS precipitable water vapour as a potential precursor to flood events. SPIE 2026 (accepted for publication in SPIE conference proceedings).

Parde, A. N., Oikonomou, C., & Haralambous, H.

Triple collocation analysis of GNSS, MWR and radiosonde water vapour retrievals across dry and wet seasons at Nicosia, Cyprus.

Hanamate, H., Parde, A. N., Oikonomou, C., & Haralambous, H.

Diagnosing and conditionally correcting X-band radar underestimation in Cyprus: a cross-validated evaluation of spatial merging and machine learning approaches. Remote Sensing, 18, 2577.

DOI: 10.3390/rs18152577

Hanmante, H.S., Parde, A.N., Oikonomou, C., Haralambous, H.

Diagnosing and Conditionally Correcting X-Band Radar Underestimation in Cyprus: A Cross-Validated Evaluation of Spatial Merging and Machine Learning Approaches. Remote Sens. 2026, 18(15), 2577.

DOI: 10.3390/rs18152577

Giannadaki, D., Bezes, A., Kotroni, V., Lagouvardos, K., Papagiannaki, K., Oikonomou, C., Haralambous, H.

Flood Susceptibility Assessment in Two Eastern Mediterranean Catchments Using a Multi-Indicator. Hydrology, 13(6), 163.

DOI: 10.3390/hydrology13060163

Parde, A.N., Oikonomou, C., Haralambous, H.

Enhancing GNSS Water Vapor Retrieval via Synergistic Microwave Radiometry: Thermodynamic Error Diagnosis and Bias Correction

DOI: 10.5194/egusphere-2026-231

Parde, A.N., Koundal, K., Bhautmage, U., Wong, M.M.F., Oikonomou, C., Haralambous, H.

Role of High-Resolution Land Surface Representation in WRF Model for Forecasting Extreme Heatwave Conditions over Cyprus Forecasting 2026, 8, 42.

DOI: 10.3390/forecast8030042

Oikonomou, C., Haralambous, H., Giannadaki, D., Tymvios, F., Charalambous, D., Kotroni, V., Lagouvardos, K., Loizou, E.

First Results of Strategic Infrastructure Project CYGMEN: Cyprus GNSS Meteorology Enhancement Environ. Earth Sci. Proc. 2025, 35, 35.

DOI: 10.3390/eesp2025035035

Biswas, T., Moses, M., Haralambous, H., Mostafa, M.G.

Insights Into Seismic-Induced Ionospheric Perturbation Following the 2025 Myanmar Earthquake. Journal of Geophysical Research: Space Physics, 130(11), e2025JA034243.

DOI: 10.1029/2025JA034243

Tripathi, S. C., Haralambous, H., & Biswas, T.

Ionospheric Variability During the 10 October 2024 Geomagnetic Storm: A Regional Analysis across Europe. Atmosphere, 16(9), 1029.

DOI: 10.3390/atmos16091029

Panda, S. K., Haralambous, H., Moses, M., Paul, K. S., & Okoh, D.

Comparison of ionospheric bottomside profile parameters (B0 & B1) from FORMOSAT-7/COSMIC-2 radio occultation profiles with Digisonde and IRI-2020 model. Astrophysics and Space Science, 370(9), 1-18.

DOI: 10.1007/s10509-025-04490-z

Haldoupis, C., Haralambous, H., & Meek, C.

An Updated Method and Algorithm for Computing Improved Ionosonde-Based Sporadic E Layer Parameters. Journal of Geophysical Research: Space Physics, 130(8), e2025JA034122.

DOI: 10.1029/2025JA034122

Paul, K. S., Haralambous, H., Moses, M., & Tripathi, S. C.

Effects of the October 2024 storm over the Global Ionosphere. Remote Sensing, 17(13), 2329.

DOI: 10.3390/rs17132329

Paul, K. S., Biswas, T., & Haralambous, H.

Evaluation of Automated Spread–F (SF) Detection over the Midlatitude Ionosphere. Atmosphere, 16(6), 642.

DOI: 10.3390/atmos16060642

Varghese, B., Haralambous, H., Oikonomou, C., Mathew, T. J., & Dandenault, P.

Investigation of characteristics of ionospheric vertical plasma drift during sunset over the mid-latitude station Nicosia, Cyprus. Indian Journal of Physics, 99(6), 1993-1999.

DOI: 10.1007/s12648-024-03414-x

Anastassopoulos, V., Argiriou, A., Cantatore, G., Cetin, S., Gardikiotis, A., Haralambous, H., Karuza, M., Kryemadhi, A., Maroudas, M., Mastronikolis, A., Oikonomou, C., Ozbozduman, K., Semertzidis, Y. K., Tsagri, M., Tsagris, I., & Zioutas, K.

Unexpected planetary relationships as the new signature in Astro-particle physics. International Journal of Modern Physics A, 40(8), 2443020.

DOI: 10.1142/S0217751X24430206

Paul, K. S., Moses, M., Haralambous, H., & Oikonomou, C.

Effects of the Mother’s Day Superstorm (10–11 May 2024) over the Global Ionosphere. Remote Sensing, 17(5), 859.

DOI: 10.3390/rs17050859

Pignalberi, A., Bilitza, D., Coïsson, P., Haralambous, H., Nava, B., Pezzopane, M., Prol, F., Smirnov, A., Themens, D. R., & Xiong, C.

Validation of the IRI-2020 topside ionosphere options through in-situ electron density observations by low-Earth-orbit satellites. Advances in Space Research, 75(5), 4192-4216.

DOI: 10.1016/j.asr.2024.05.056

Paul, K. S., Haralambous, H., Moses, M., Oikonomou, C., Potirakis, S. M., Bergeot, N., & Chevalier, J. M.

Investigation of the Ionospheric Response on Mother’s Day 2024 Geomagnetic Superstorm over the European Sector. Atmosphere, 16(2), 180.

DOI: 10.3390/atmos16020180

Sanyal, A., Brawar, B., Maity, S. K., Jana, S., Polard, J. M., Newton, P., Williams, G. S., Potirakis, S. M., Haralambous, H., Balasis, G., Brundell, J., Panchadhyayee, P., Datta, A., Maurya, A. K., Ray, S., & Sasmal, S.

Investigation of the Ionospheric Effects of the Solar Eclipse of April 8, 2024 Using Multi-Instrument Measurements. Atmosphere, 16(2).

DOI: 10.3390/atmos16020161

Paul, K. S., & Haralambous, H.

Investigation for Possible Association of the Topside and Bottomside Ionospheric Irregularities over the Midlatitude Ionosphere. Applied Sciences (2076-3417), 15(2).

DOI: 10.3390/app15020506

Giannadaki, D., Oikonomou, C., & Haralambous, H.

Correlation of Precipitable Water Vapour and heavy rainfall over Cyprus using GNSS sensors network. Frontiers in Signal Processing, 5, 1622256.

DOI: 10.3389/frsip.2025.1622256

Paul, K. S., Haralambous, H., Moses, M., & Panda, S. K.

Global Accuracy Assessment of Ionospheric F2 Peak Characteristics based on coincident-colocated COSMIC-2 RO and Digisonde Measurements: A Three-Year Period Analysis (2020‒2022). Advances in Space Research.

DOI: 10.1016/j.asr.2025.09.083

Paul, K. S., Haralambous, H., Altadill, D., Segarra, A., Navas-Portella, V., & de Paula, V.

Climatology of the spread F over Roquetes, Spain: Impact of the medium scale traveling ionospheric disturbances. Journal of Space Weather and Space Climate, 15, 49.

DOI: 10.1051/swsc/2025046

Pignalberi A., Nava B., Prol F., Haralambous H., Themens D.R., Smirnov A., Pezzopane M., Coïsson P.

Improving the NeQuick Model in the Plasmasphere through Radio Occultation and POD TEC Observations. IEEE Transactions on Geoscience and Remote Sensing, 2025

DOI: 10.1109/TGRS.2025.3635770

Pica E., Spogli L., Cesaroni C., Alfonsi L., Haralambous H., Vallianatos F., De Franceschi G., Romano V., Marcocci C.

Assessing the ionospheric scintillations occurrence on L-band in the southern Mediterranean sector. Advances in Space Research, 75(1), 837-855

DOI: 10.1016/j.asr.2024.10.032

Paul, K. S., & Haralambous, H.

Investigation for Possible Association of the Topside and Bottomside Ionospheric Irregularities over the Midlatitude Ionosphere. Applied Sciences (2076-3417), 15(2)

DOI: 10.3390/app15020506

Sanyal A., Brawar B., Maity S.K., Jana S., Polard J.M., Newton P., Williams G.S., Potirakis S.M., Haralambous H., Balasis G., Brundell J., Panchadhyayee P., Datta A., Maurya A.K., Ray S., Sasmal S.

Investigation of the Ionospheric Effects of the Solar Eclipse of April 8, 2024 Using Multi-Instrument Measurements. Atmosphere, 16(2)

DOI: 10.3390/atmos16020161

Paul, K. S., Haralambous, H., Moses, M., Oikonomou, C., Potirakis, S. M., Bergeot, N., & Chevalier, J. M.

Investigation of the Ionospheric Response on Mother’s Day 2024 Geomagnetic Superstorm over the European Sector. Atmosphere, 16(2), 180

DOI: 10.3390/atmos16020180

Paul, K. S., Moses, M., Haralambous, H., & Oikonomou, C.

Effects of the Mother’s Day Superstorm (10–11 May 2024) over the Global Ionosphere. Remote Sensing, 17(5), 859

DOI: 10.3390/rs17050859

Zioutas, K.; Anastassopoulos, V.; Argiriou, A.; Cantatore, G.; Cetin, S.; Gardikiotis, A.; Haralambous, H.; Karuza, M.; Kryemadhi, A.; Maroudas, M.; Mastronikolis, A.; Oikonomou, C.; Ozbozduman, K.; Semertzidis, Y. K.; Tsagri, M.; Tsagris, I.

Unexpected planetary relationships as the new signature in Astro-particle physics. International Journal of Modern Physics A, 40(8), 2443020

DOI: 10.1142/S0217751X24430206

Paul, K. S., Biswas, T., & Haralambous, H.

Evaluation of Automated Spread–F (SF) Detection over the Midlatitude Ionosphere. Atmosphere, 16(6), 642

DOI: 10.3390/atmos16060642

Pignalberi, A., Bilitza, D., Coïsson, P., Haralambous, H., Nava, B., Pezzopane, M.,Prol, F., Smirnov, A., Themens, D.R., Xiong, C.

Validation of the IRI-2020 topside ionosphere options through in-situ electron density observations by low-Earth-orbit satellites. Advances in Space Research, 75(5), 4192-4216

DOI: 10.1016/j.asr.2024.05.056

Constantinides, A., Kousioumari, C., Najat, S., & Haralambous, H.

Low-Profile Circularly Polarized HF Helical Phased Array: Design, Analysis, and Experimental Evaluation. Applied Sciences, 14(12), 5075

DOI: 10.3390/app14125075

Politis D.Z., Sasmal S., Hayakawa M., Haralambous H., Datta A., Potirakis S.M.

A Six-Year (2014–2020) Statistical Correlation Study of VLF Terminator Time Shift with Earthquakes in Japan. Remote Sensing, 16(22), 4162

DOI: 10.3390/rs16224162

Varghese, B., Haralambous, H., Oikonomou, C., Mathew, T. J., & Dandenault, P.

Investigation of characteristics of ionospheric vertical plasma drift during sunset over the mid-latitude station Nicosia, Cyprus. Indian Journal of Physics, 1-7

DOI: 10.1007/s12648-024-03414-x

Paul, K. S., Haralambous, H., & Oikonomou, C.

Ionospheric response of the March 2023 geomagnetic storm over European latitudes. Advances in Space Research, 73(12), 6029-6040

DOI: 10.1016/j.asr.2024.03.026

Haldoupis, C., Haralambous, H., & Meek, C.

A Simplified Method of True Height Analysis to Estimate the Real Height of Sporadic E Layers. Journal of Geophysical Research: Space Physics, 129(4), e2024JA032505

DOI: 10.1029/2024JA032505

Haralambous, H., & Makrominas, M.

Validation of the European Ionosonde Service nowcasting foF2 maps over the eastern Mediterranean. Advances in Space Research, 73(3), 1799-1813

DOI: 10.1016/j.asr.2023.10.035

Pezzopane, M.;Pignalberi, A.; Pietrella, M.;Haralambous, H.; Prol, F.; Nava, B.; Smirnov, A.; Xiong, C.

An Update of the NeQuick-Corr Topside Ionosphere Modeling Based on New Datasets. Atmosphere, 15(4), 498

DOI: 10.3390/atmos15040498

Paul, K. S., Rafi, M. H., Haralambous, H., & Mostafa, M. G.

Correlation of Rate of TEC Index and Spread F over European Ionosondes. Atmosphere, 15(3), 331

DOI: 10.3390/atmos15030331

Zioutas, K., Anastassopoulos, V.,Argiriou, A.,Cantatore, G.,Cetin, S.,Gardikiotis, A.,Haralambous, H.,Karuza, M.,Kryemadhi, A.,Maroudas, M.,Mastronikolis, A.,Oikonomou, C. Ozbozduman, K.,Semertzidis, Y. K.,Tsagri, M.,Tsagris

Novel Planetary Signatures from the Dark Universe. Astrophysics, 66(4), 550-558

DOI: 10.1007/s10511-024-09809-2

Haldoupis, C.; Haralambous, H.; Meek, C.; Mathews, J.D.

Understanding the Diurnal Cycle of Midlatitude Sporadic E. The Role of Metal Atoms. Journal of Geophysical Research: Space Physics, 2023, 128(4), e2023JA031336

DOI: 10.1029/2023JA031336

Haralambous, H.; Guerra, M.; Chum, J.; Verhulst, G. W. T.; Barta, V.; Altadill, D.; Cesaroni, C.; Galkin, I.; Márta, K.; Mielich, J.; Kouba, D.; Buresova, D.; Segarra, A.; Spogli, L.; Rusz, J.; and Zedník, J.

Multi‐Instrument Observations of Various Ionospheric Disturbances Caused by the 6 February 2023 Turkey Earthquake. Journal of Geophysical Research: Space Physics, 128, e2023JA031691

DOI: 10.1029/2023JA031691

Gulyaeva; T.; Lukianova, R.; Haralambous, H.

Ionosphere Heterogeneities at Dawn−Dusk Terminator Related to the Starlink Satellites Launch Disaster on 3−8 February 2022. Journal of Geophysical Research: Space Physics, 2023, 128(11), e2023JA031577

DOI: 10.1029/2023JA031577

Haralambous, H.; Paul, K.S.; Singh, A.K.; Gulyaeva, T.

Investigation of the Topside Ionosphere over Cyprus and Russia Using Swarm Data. Remote Sensing, 2023, 15(5), 1344

DOI: 10.3390/rs15051344

Paul, K.S.; Haralambous, H.

Travelling Ionospheric Disturbance Direction of Propagation Detection Using Swarm A-C In-Situ Electron Density. Remote Sens. 2023, 15, 897

DOI: 10.3390/rs15040897

Haralambous, H.; Makrominas, M.

Validation of the European Ionosonde Service nowcasting foF2 maps over the eastern Mediterranean. Advances in Space Research, In Press, Corrected Proof, 2023

DOI: 10.1016/j.asr.2023.10.035

Oikonomou, C.; Leontiou, T.; Haralambous, H.; Gulyaeva, T.L.; & Panchenko, V.A.

Occurrence features of intermediate descending layer and Sporadic E observed over the higher mid-latitude ionospheric station of Moscow. Earth Planets Space 75, 39

DOI: 10.1186/s40623-023-01796-6

Varghese B.; Haralambous, H.; Oikonomou, C.; Cherian, L.; Abraham, A.; Ankitha, N.; Asha Anie Varghese; Gopika S. Vijayan; T.J. Mathew

Characteristics of F-region velocity vortex during sunrise: Observations from the Mid-Latitude Station Nicosia. Adv Space Res, 69 (11), 4123-4128

DOI: /10.1016/j.asr.2022.03.007

Paul, K.S.; Haralambous, H.; Oikonomou, C.; Singh, A.K.; Gulyaeva, T.L; Panchenko, V.A; Altadill, D.; Buresova, D.; Mielich, J.; Verhulst, T.

Mid-latitude spread F over an Extended European area. Journal of Atmospheric and Solar-Terrestrial Physics, 248, 106093

DOI: 10.1016/j.jastp.2023.106093

Haralambous H.; Constantinides A.; and Paul, K.S.

HF noise characteristics over Cyprus. Remote Sensing, 14(23): 6040

DOI: 10.3390/rs14236040

Gulyaeva, T.; Shubin, V.; Haralambous, H.; Hernández-Pajares, M.; & Stanislawska, I.

Generation of proxy GIM-TEC for extreme storms before the era of GNSS observations. Journal of Geophysical Research: Space Physics, 127, e2021JA029846

DOI: 10.1029/2021JA029846

Giannaros, C.; Dafis, S.; Stefanidis, S.; Giannaros, T. M.; Koletsis, I.; & Oikonomou, C.

Hydrometeorologicalanalysis of a flash flood event in an ungauged Mediterranean watershed under an operational forecasting and monitoring context. Meteorological Applications, 29(4)

DOI: 10.1002/met.2079

Kumar Singh, A.; Haralambous, H.; Kumar Panda, S.;

Comparison of bottomside ionospheric profile parameters (B0 and B1) extracted from FORMOSAT-7/COSMIC-2 GNSS Radio occultations with Digisondes and IRI-2016 model. Advances in Space Research, 2022, 70(4), 1121–1141

DOI: 10.1016/j.asr.2022.05.045

Constantinides, A.; Haralambous H.; Papadopoulos H.; Makrominas M.

Models of HF Interference over Cyprus. Applied Sciences, 12(22):11808

DOI: 10.3390/app122211808

Constantinides, A.; Najat, S.; Haralambous, H.

Atmospheric Ducting Interference on DAB, DAB+ Radio in Eastern Mediterranean Electronics. Electronics, 11(24), 4183

DOI: 10.3390/electronics11244183

Oikonomou, C.; Haralambous, H.; Leontiou T.; Tsagouri, I; Buresova, D.; Mošna

Intermediate descending layer and sporadic E tidelike variability observed over three mid-latitude ionospheric stations. Adv. Space Res, 2022, 69(1), 96 – 110

DOI: 10.1016/j.asr.2021.08.038

Oikonomou, C.; Haralambous, H.; Paul, A.; Ray, S.; Alfonsi, L.; Cesaroni, C.; Sur, D.

Investigation of the negative ionospheric response of the 8 September 2017 geomagnetic storm over the European sector. Adv in Space Res, Vol 70(4), 1104-1120

DOI: 10.1016/j.asr.2022.05.035

Paul, K.S.; Haralambous, H.; Singh, A.K.; Gulyaeva, T.L.; Panchenko, V.A.

Mid-latitude Spread F long-term occurrence characteristics as a function of latitude over Europe. Advances in Space Research, 70(3), 710-722

DOI: 10.1016/j.asr.2022.05.022

Giannaros, C.; Galanaki, E.; Kotroni, V.; Lagouvardos, K.; Oikonomou, C.; Haralambous, H.; Giannaros, T.M.

Pre-Operational Application of a WRF-Hydro-Based Fluvial Flood Forecasting System in the Southeast Mediterranean. Forecasting 2021, 3, 437-446

DOI: 10.3390/forecast3020026

Haralambous, H., Leontiou, T., Petrou, V., Kumar Singh, A., Charalambides, M., Lithoxopoulos, N., Agisilaou, A.

Adjusting CCIR Maps to Improve Local Behaviour of Ionospheric Models. Atmosphere 2021, 12, 691

DOI: 10.3390/atmos12060691

A.K. Singh, H. Haralambous, C. Oikonomou, T. Leontiou

A topside investigation over a mid-latitude digisonde station in Cyprus Adv. Space Res., 67 (2), 739-748

DOI: 10.1016/j.asr.2020.10.009

T.Gulyaeva, H. Haralambous, I.Stanislawska

Persistent perturbations of ionosphere at diminution of solar and geomagnetic activity during 21–24 solar cycles, . Atmos. Sol.-Terr. Phys, 221, 706

DOI: 10.1016/j.jastp.2021.105706

Panda, S.K., Haralambous, H., Moses, M., Dabbakuti, J.K. and Tariku, Y.A.

Ionospheric and plasmaspheric electron contents from space-time collocated digisonde, COSMIC, and GPS observations and model assessments. Acta Astronautica, 179, pp.619-635

DOI: 10.1016/j.actaastro.2020.12.005

L. Alfonsi, C. Cesaroni, L. Spogli, M. Regi, A. Paul, S. Ray, S. Lepidi, D. Di Mauro, H. Haralambous, C. Oikonomou, P.R. Shreedevi, A.K. Sinha

Ionospheric disturbances over the Indian sector during 8 September 2017 geomagnetic storm: plasma structuring and propagation. Space Weather, 19, e2020SW002607

DOI: 10.1029/2020SW002607

A. K. Singh, H. Haralambous, C. Oikonomou

Validation and Improvement of NeQuick Topside Ionospheric Formulation Using COSMIC/FORMOSAT-3 Data. Journal of Geophysical Research - Space Physics, 49

DOI: 10.1029/2020JA028720

K.S. Paul, H. Haralambous, C. Oikonomou, C., A. Paul

Investigation of Satellite Trace (ST) and Multi-reflected Echo (MRE) ionogram signatures and its possible correlation to nighttime spread F development from Cyprus over the solar mini-max (2009-2016). Advances in Space Research

DOI: 10.1016/j.asr.2020.12.040

Oikonomou, C., Haralambous, H., Pulinets, S., Khadka, A., Paudel, S.R., Barta, V., Muslim, B., Kourtidis, K., Karagioras, A., ˙Inyurt, S.

Investigation of Pre-Earthquake Ionospheric and Atmospheric Disturbances for Three Large Earthquakes in Mexico. Geosciences 2021, 11, 16.

DOI: 10.3390/geosciences11010016

Fdez-Arroyabe, P., Kourtidis, K., Haldoupis, et al.

Glossary on atmospheric electricity and its effects on biology. Int J Biometeorol 65, 5–29 (2021)

DOI: 10.1007/s00484-020-02013-9

Galanaki, E., Lagouvardos, K., Kotroni, V., Giannaros, T., and Giannaros, C.

Implementation of WRF-Hydro at two drainage basins in the region of Attica, Greece, Nat. Hazards Earth Syst. Sci. Discuss.

DOI: 10.5194/nhess-21-1983-2021

Panda, S.K., Reddybattula, K.D., Haralambous, H. and Sharma, S.K.

Assessment of ionospheric variability from IRI-2016, SPIM-2017, and IGS-GIM using Digisonde and GPS observations over Cyprus. Astrophysics and Space Science, 365(2), pp.1-23

DOI: 10.1007/s10509-020-03752-2

C. Haldoupis, H. Haralambous, C. Meek.

On the necessity of using foμEs instead of foEs in estimating the intensity and variability of sporadic E layers, Journal of Atmospheric and Solar-Terrestrial Physics, 206, 2020, 105327, ISSN 1364-6826

DOI: 10.1016/j.jastp.2020.105327

Giannaros T.M., Pikridas C

Assessing the impact of GNSS ZTD data assimilation into the WRF modeling system during high-impact rainfall events over Greece. Remote Sensing. Remote Sens. 2020, 12, 383

DOI: 10.3390/rs12030383

Giannaros, C.; Kotroni, V.; Lagouvardos, K.; Oikonomou, C.; Haralambous, H.; Papagiannaki, K.

Hydrometeorological and Socio-Economic Impact Assessment of Stream Flooding in Southeast Mediterranean: The Case of Rafina Catchment (Attica, Greece). Water 2020, 12, 2426

DOI: 10.3390/w12092426

A. Pignalberi, M. Pezzopane, D. R. Themens, H. Haralambous, B. Nava and P. Coïsson

On the Analytical Description of the Topside Ionosphere by NeQuick: Modeling the Scale Height Through COSMIC/FORMOSAT-3 Selected Data. in IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 13, pp. 1867-1878, 2020

DOI: 10.1109/JSTARS.2020.2986683

Nava, B., Haralambous, H.

Use of RO-derived electron density profiles to assess the NeQuick model topside. In 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) (pp. 1-1). IEEE

DOI: 10.23919/URSIAP-RASC.2019.8738746

Ashik Paul,, Dibyendu Sur, H. Haralambous

Multi-wavelength coordinated observations of ionospheric irregularity structures from an anomaly crest location during unusual solar minimum of the 24th cycle. Adv. Space Res., 65 (5), 1402-1413

DOI: 10.1016/j.asr.2019.11.035

Krishnendu Sekhar Paul, H. Haralambous, Christina Oikonomou, Ashik Paul

Long-term aspects of nighttime spread F over a low mid-latitude European station. Advances in Space Research, 64(6), 1199-1216

DOI: 10.1016/j.asr.2019.06.020

Mostafa, M. G., H. Haralambous., Oikonomou, C.

Statistical ionospheric E layer properties measured with the Cyprus Digisonde and comparisons with IRI predictions. Advances in Space Research, 61(1), 337-347

DOI: 10.1016/j.asr.2017.10.029

Oikonomou, C., Tymvios, F., Pikridas, C., Bitharis, S., Balidakis, K., Michaelides, S., Haralambous, H., and Charalambous, D.

Tropospheric delay performance for GNSS integrated water vapor estimation by using GPT2w model, ECMWF’s IFS operational model and in situ meteorological data, Adv. Geosci., 45, 363-375

DOI: 10.5194/adgeo-45-363-2018

Krishnendu Sekhar Paul, H. Haralambous, Christina Oikonomou, Ashik Paul, Anna Belehaki, Tsagouri Ioanna, Daniel Kouba and Dalia Buresova

Multi-station investigation of spread F over Europe during low to high solar activity J. Space Weather Space Climate., 8 A27

DOI: 10.1051/swsc/2018006

S. Panda, H. Haralambous, V Kavutarapu

Global Longitudinal Behavior of IRI Bottomside Profile Parameters from FORMOSAT-3/COSMIC Ionospheric Occultations. Journal of Geophysical Research: Space Physics 123

DOI: 10.1029/2018JA025246

Shaikh, M. M., Nava, B., H. Haralambous (2018).

On the Use of Topside RO‐Derived Electron Density for Model Validation. Journal of Geophysical Research: Space Physics 123(5), pp. 3943-3954

DOI: 10.1029/2017JA025132

Panda, S. K., H. Haralambous H.

Variability of the bottomside B0 and B1 parameters of ionospheric electron density profile over Cyprus and comparison with IRI-2012 model. Advances in Space Research, 60(2), 317-328

DOI: 10.1016/j.asr.2016.08.025

Oikonomou, C., H. Haralambous., Muslim, B.

Investigation of ionospheric precursors related to deep and intermediate earthquakes based on spectral and statistical analysis. Advances in Space Research, 59(2), 587-602

DOI: 10.1016/j.asr.2016.10.026

Oikonomou, C., H. Haralambous., Moldovan, I. A., Greculeasa, R.

Investigation of pre-earthquake ionospheric anomalies using VLF/LF INFREP European and GNSS global networks. Romanian Journal of Physics, 62, 816

DOI: link

Mostafa, Md G., Eleni Tsolaki, H. Haralambous

HF Spectral Occupancy Time Series Models Over the Eastern Mediterranean Region. IEEE Transactions on Electromagnetic Compatibility 59.1 (2017): 240-248

DOI: 10.1109/TEMC.2016.2606130

Veettil, S. V., H. Haralambous, Aquino, M.

Observations of quiet-time moderate midlatitude L-band scintillation in association with plasma bubbles. GPS Solutions, 21(3), 1113-1124

DOI: 10.1007/s10291-016-0598-x

Mostafa, M. G., H. Haralambous., Oikonomou, C.

Evaluation of IRI predicted characteristics of ionospheric F1 layer by ionosonde observations in Nicosia, Cyprus. Advances in Space Research, 59(6), 1548-1558

DOI: 10.1016/j.asr.2016.12.021

Mathew, T. J., H. Haralambous., Oikonomou, C.

Pre-sunrise uplift and sunrise downward excursion in the F-region vertical plasma drift: Observations from the mid-latitude station Nicosia. Advances in Space Research, 59(7), 1792-1799

DOI: 10.1016/j.asr.2017.01.015

Ray, S., Roy, B., Paul, K. S., Goswami, S., Oikonomou, C., H. Haralambous., ... & Paul, A.

Study of the effect of 17–18 March 2015 geomagnetic storm on the Indian longitudes using GPS and C/NOFS. Journal of Geophysical Research: Space Physics, 122(2), 2551-2563

DOI: 10.1002/2016JA023127

H. Haralambous., Papadopoulos, H.

24-h HF Spectral Occupancy Characteristics and Neural Network Modeling Over Northern Europe. IEEE Transactions on Electromagnetic Compatibility, 59(6), 1817-1825

DOI: 10.1109/TEMC.2017.2692387

Wijaya, D. D., H. Haralambous., Oikonomou, C., & Kuntjoro, W.

Determination of the ionospheric foF2 using a stand-alone GPS receiver. Journal of Geodesy, 91(9), 1117-1133

DOI: 10.1007/s00190-017-1013-2

Nastase-Ilie E., Oikonomou C., Toma-Danila D., H. Haralambous., Muntean A., Moldovan I.A.

Investigation of ionospheric precursors of earthquakes in Romania using the Romanian GNSS/GPS network. Rom Journal Phys, 61(7-8)

DOI: link

Oikonomou, C., H. Haralambous, Muslim, B.

Investigation of ionospheric TEC precursors related to the M7. 8 Nepal and M8. 3 Chile earthquakes in 2015 based on spectral and statistical analysis. Natural Hazards, 83(1), 97-116

DOI: 10.1007/s11069-016-2409-7

Haralambous H., Oikonomou, C.

Comparison of peak characteristics of the F2 ionospheric layer obtained from the Cyprus Digisonde and IRI-2012 model during low and high solar activity period. Advances in Space Research, 56(9), 1927-1938

DOI: 10.1016/j.asr.2015.01.036

B Muslim, H. Haralambous, C. Oikonomou, Sefria Anggarani

Global model of ionospheric slab thickness and its validation for foF2 prediction during ionospheric storm, Annals of Geophysics 2015 Vol 58, No 5

DOI: 10.4401/ag-6721

Paul, A., H. Haralambous., Oikonomou, C.

Characteristics of postmidnight L band scintillation in the transition region from the equatorial to midlatitudes over the Indian longitude sector using COSMIC, C/NOFS, and GPS measurements. Radio Science, 50(12), 1246-1255

DOI: 10.1002/2015RS005807

C. Oikonomou, H. Haralambous, C. Haldoupis, Chris Meek

Sporadic E tidal variabilities and characteristics observed with the Cyprus Digisonde. Journal of Atmospheric and Solar-Terrestrial Physics, Volume 119, Nov 2014, Pages 173-183

DOI: 10.1016/j.jastp.2014.07.014

Vryonides, P., H. Haralambous

Comparison of COSMIC measurements with the IRI-2007 model over the eastern Mediterranean region. Journal of advanced research, 4(3), 297-301

DOI: 10.1016/j.jare.2012.09.006

H. Haralambous., H. Papadopoulos

A neural network approach for the interpolation of missing foF2 data points. Engineering Intelligent Systems 20(1-2): 193-203. CRL Publishing, 2012

DOI: 10.1007/978-3-642-23957-1_35

Cander, L. R., H. Haralambous

On the importance of total electron content enhancements during the extreme solar minimum. Advances in Space Research, 47(2), 304-311

DOI: 10.1016/j.asr.2010.08.026

Papadopoulos, H., H. Haralambous

Reliable prediction intervals with regression neural networks. Neural Networks, 24(8), 842-851

DOI: 10.1016/j.neunet.2011.05.008

A. Konstantinidis, H. Haralambous, A. Agapitos and H. Papadopoulos

A GP-MOEA/D Approach for Modelling Total Electron Content over Cyprus. Engineering Intelligent Systems 18(3-4): 193-203. CRL Publishing

DOI: link

H. Haralambous, Papadopoulos H

Diurnal Neural Congestion Models for High-Frequency Broadcast Users IEEE Transactions on Broadcasting June 2009 Vol 55 pp 145-154

DOI: 10.1109/TBC.2009.2013890

Casimiro, A., Azevedo, J., Economou, L., H. Haralambous., Tulunay, E., Tulunay, Y., ... & Warrington, E. M

HF spectrum occupancy and antennas. Annals of Geophysics, 52(3-4), 339-357

DOI: 10.4401/ag-4581

Economou, L. V., H. Haralambous., Pantjairos, C. A., Green, P. R., Gott, G. F., Laycock, P. J., Boberg, S

Models of HF spectral occupancy over a sunspot cycle. IEE Proceedings-Communications, 152(6), 980-988

DOI: 10.1049/cp:20030420