UAS_Reprints: Recent submissions

Now showing items 181-200 of 941

Responses of various types of antennas to the globally distributed air-earth current monitored at Maitri, Antarctica

Jeeva, K.; Seemala, Gopi K.; Selvaraj, C.; Rathod, Gopalsingh; Kamra, A.K.; Sinha, A.K. (2021)

The role of antennas in the detection of atmospheric conduction current has been discussed since the beginning of the 20th century. Propriety of the antenna design needs to be reviewed from time to time as the measurements ...
Association of ionospheric signatures to various tectonic parameters during moderate to large magnitude earthquakes: case study

Sunil, A. S.; Bagiya, Mala S.; Bletery, Quentin; Ramesh, D. S. (2021)

The sudden ground movement associated with Mw > 6.5 earthquakes is considered a potential source of ionospheric electron density perturbations over the fault region. Coseismic ground displacement is a function of various ...
Climatological study of the ion temperature in the ionosphere as recorded by Millstone Hill incoherent scatter radar and comparison with the IRI model

Pignalberi, Alessio; Aksonova, Kateryna D.; Zhang, Shun-Rong; Truhlik, Vladimir; Gurram, Padma; Pavlou, Charalambos (2021)

Ion temperature data recorded by Millstone Hill incoherent scatter radar (42.61 N, 288.51 E) over four full solar cycles (from 1970 to 2018) are analyzed to depict its climatological behavior in the range of altitudes ...
Evidence for the significant differences in response times of equatorial ionization anomaly crest corresponding to plasma fountains during daytime and post-sunset hours

Kumar, A.; Chakrabarty, D.; Pandey, K.; Fejer, B.G.; Sunda, S.; Seemala, G.K.; Sripathi, S.; Yadav, A.K. (2021)

Based on 10 years' (2010–2019) of vertical total electron content (VTEC) data from Ahmedabad (23.0°N, 72.6°E, dip angle 35.2°) and campaign based OI 630.0 nm airglow intensity measurements from Mt. Abu (24.6°N, 72.7°E, ...
Ground-based GNSS and C/NOFS observations of ionospheric irregularities over Africa: a case study of the 2013 St. Patrick’s Day geomagnetic storm

Amaechi, P. O.; Oyeyemi, E. O.; Akala, A. O.; Messanga, H. E.; Panda, S. K.; Seemala, Gopi K.; Oyedokun, J. O.; Fleury, R.; Amory-Mazaudier, C. (2021)

In this paper, the variations of ionospheric irregularities have been studied using C/NOFS, ground-based GNSS and magnetometer measurements in Africa during the St. Patrick geomagnetic storm of March 17, 2013. The latitudinal ...
A possible case of sporadic aurora observed at Rio de Janeiro

Oliveira, Denny M.; Hayakawa, Hisashi; Bhaskar, Ankush; Zesta, Eftyhia; Vichare, Geeta (2020)

Being footprints of major magnetic storms and hence major solar eruptions, mid- to low-latitude aurorae have been one of the pathways to understand solar–terrestrial environments. However, it has been reported that aurorae ...
Magnetic conjugacy of Pc1 waves and isolated proton precipitation at subauroral latitudes: importance of ionosphere as intensity modulation region

Ozaki, Mitsunori; Shiokawa, Kazuo; Horne, Richard B.; Engebretson, Mark J.; Lessard, Marc; Ogawa, Yasunobu; Hosokawa, Keisuke; Nosé, Masahito; Ebihara, Yusuke; Kadokura, Akira; Yagitani, Satoshi; Miyoshi, Yoshizumi; Hashimoto, Shion; Sinha, Shipra; Sinha, Ashwini K.; Seemala, Gopi K.; Jun, Chae-Woo (2021)

Pc1 geomagnetic pulsations, equivalent to electromagnetic ion cyclotron waves in the magnetosphere, display a specific amplitude modulation, though the region of the modulation remains an open issue. To classify whether ...
Fluid simulation of ion acoustic solitary waves in electron–positron–ion plasma

Singh, Kuldeep; Kakad, Amar; Kakad, Bharati; Saini, N. S. (2021)

We performed one-dimensional fluid simulation to study the evolution and characteristics of ion acoustic solitary waves (IASWs) in a plasma comprised of hot inertial ions, superthermal electrons and positrons. The initial ...
Modeling of Ionospheric Responses to Atmospheric Acoustic and Gravity Waves Driven by the 2015 Nepal M(w)7.8 Gorkha Earthquake

Inchin, P. A.; Snively, J. B.; Zettergren, M. D.; Komjathy, A.; Verkhoglyadova, O. P.; Tulasiram, S. (2020)

Near- and far-field ionospheric responses to atmospheric acoustic and gravity waves (AGWs) generated by surface displacements during the 2015 Nepal Mw7.8 Gorkha earthquake are simulated. Realistic surface displacements ...
Occurrence climatology of equatorial plasma bubbles (EPBs) using optical observations over Kolhapur, India during solar cycle-24

Gurav, Onkar B.; Ghodpage, Rupesh N.; Patil, Parashram T.; Samireddipalle, Sripathi; Sharma, Ashok K.; Taori, Alok K.; Shetti, Dadaso J. (2020)

In this paper, the occurrence characteristics of the equatorial plasma bubbles (EPBs) using OI 630.0 nm all sky imager (ASI) night airglow observations over Kolhapur (16.8o N, 74.2o E, 10.6o dip. Lat.) during the solar ...
Modeling total electron content derived from radio occultation measurements by COSMIC satellites over the African region

Mungufeni, Patrick; Samireddipalle, Sripathi; Migoya-Orué, Yenca; Kim, Yong Ha (2020)

This study developed a model of total electron content (TEC) over the African region. The TEC data were obtained from radio occultation measurements done by the Constellation Observing System for Meteorology, Ionosphere, ...
Simulation study of motion of charged particles trapped in Earth’s magnetosphere

Soni, Pankaj K.; Kakad, Bharati; Kakad, Amar (2020)

This article aims to understand the motion of the charged particles trapped in the Earth’s inner magnetosphere. The emphasis is on identifying the numerical scheme, which is appropriate to characterize the trajectories of ...
Evolution of ion acoustic solitary waves in pulsar wind

Singh, Kuldeep; Kakad, Amar; Kakad, Bharati; Saini, Nareshpal Singh (2020)

We have studied the evolution of ion acoustic solitary waves (IASWs) in pulsar wind. The pulsar wind is modelled by considering a weakly relativistic unmagnetized collisionless plasma comprised of relativistic ions and ...
Ultra-low frequency (ULF) magnetic field emissions associated with some major earthquakes occurred in Indian Subcontinent

Swati; Singh, Birbal; Pundhir, Devbrat; Sinha, Ashwini Kumar; Rao, Madhusudan K.; Guha, Anirban; Hobara, Yashuhide (2020)

We have analyzed ULF magnetic field emissions data obtained from identical 3- component search coil magnetometers installed at Indian stations of Agra (Geograph. lat. 27.2◦N, long. 78◦E), Shillong (25.92o N, 91.88o E), and ...
Gravity and pressure‐gradient currents using ionospheric electron density measurements from COSMIC satellites

Sreelakshmi, J.; Vichare, Geeta (2020)

The gravity‐driven and pressure‐gradient currents coexist in the ionosphere, and their effects are significant in there, rather than at the outside of the ionosphere; and can be important while studying the ionospheric ...
Effects of IMF By on ring current asymmetry under Southward IMF Bz conditions observed at ground magnetic stations: Case studies

Kumar, Sandeep; Veenadhari, B.; Chakrabarty, D.; Tulasiram, S.; Kikuchi, T.; Miyoshi, Y. (2020)

In this paper, we have evaluated the role of interplanetary magnetic field (IMF) By on the asymmetry of the ring current during the main phase of geomagnetic storms. The mean H variations have been calculated using 31 ...
Observational evidence of equatorial ionospheric response to severe cyclonic storms ‘AILA’ and ‘WARD’ observed over the North Indian Ocean

Bhagavathiammal, G.J.; Lal, Manohar; Emperumal, K. (2020)

This work addresses the vertical atmosphere –ionosphere coupling through two cyclonic events AILA (23–26 May 2009) and ‘WARD’ (10–16 December 2009) observed over the North Indian Ocean. Combined ground Digisonde Tirunelveli ...
On the seeding of periodic Equatorial Plasma Bubbles by gravity waves associated with tropical cyclone: A case study

Ajith, K. K.; Li, Guozhu; Tulasiram, S.; Yamamoto, M.; Hozumi, K.; Abadi, Prayitno; Xie, Haiyong (2020)

Understanding the day‐to‐day variability of equatorial plasma bubble (EPB) irregularities has been a major challenge for many decades that makes the deterministic prediction of EPBs remain elusive. In the present study, ...
Lithospheric density structure and effective elastic thickness beneath Himalaya and Tibetan Plateau: Inference from the integrated analysis of gravity, geoid, and topographic data incorporating seismic constraints

Ravikumar, M.; Singh, B.; Kumar, V. Pavan; Satyakumar, A. V.; Ramesh, D. S; Tiwari, V. M. (2020)

Investigation of deep crustal and lithospheric structures is essential to understand the nature of geodynamical processes beneath the Himalaya and Tibetan plateau of the India‐Eurasia collision zone. Our density cross ...
Lower‐band “Monochromatic” chorus riser subelement/wave packet observations

Tsurutani, Bruce T.; Chen, Rui; Gao, Xinliang; Lu, Quanming; Pickett, Jolene S.; Lakhina, Gurbax S.; Sen, Abhijit; Hajra, Rajkumar; Park, Sang A; Falkowski, Barbara J. (2020)

Three lower‐band (f< 0.5 fce) chorus riser elements detected in the dayside generation region were studied in detail using the Van Allen Probe data. Two subelements/wave packets within each riser were examined for their ...

Now showing items 181-200 of 941

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