We report observations of co-existing rising and falling tone emissions of electromagnetic ion cyclotron (EMIC) waves
by THEMIS E spacecraft. The investigation of these fne structures of the EMIC waves is essential from ...
In the present-day context, small satellites and their constellations consisting of varying sizes (nano, micro, pico satellites) are being favored
for remote sensing and in situ probing of the heliosphere and terrestrial ...
Southward component of Interplanetary Magnetic Field (IMF) leads to the entry of energetic particles of
solar origin into the magnetosphere. A part of this energy is subsequently released from the night-side as a
geomagnetic ...
Reddimalla, Naresh; Vichare, Geeta; Murthy, J V Ramana(2024)
The equations governing the neutral wind velocities and temperature, which depict
the oscillations of atmospheric tides, incorporate various elements of the atmosphere. These
factors comprise background wind, temperature ...
The Scientific Committee on Solar-Terrestrial Physics (SCOSTEP, https://scostep.org/) runs the program of Predictability of the variable Solar-Terrestrial Coupling (PRESTO) in 2020–2024. The PRESTO program (https://scost ...
A gamma-ray burst, named GRB 221009A, occurred on 9 October 2022 and
is the brightest ever observed GRB, whose frequency is now estimated as once in 10,000
years. This GRB was reported to be observed from many space ...
We report F-region airglow imaging of fossil
plasma depletions around midnight that revived afresh un der persisting thermospheric gravity wave (GW) activity. An
all-sky imager recorded these events in OI 630 nm imag ing ...
Nayak, Chinmaya; Bulusu, Jayashree; Vichare, Geeta; Dimri, A. P.(2024)
The current study explores the relationship between solar variability and tropical cyclone (TC)
activity using sunspot number (SSN) and TC best‐track data as respective proxies. We have considered six
regions of the ...
Gowtam, V. Sai; Connor, Hyunju; Kunduri, Bharat S. R.; Raeder, Joachim; Laundal, Karl M.; Tulasi Ram, S.; Ozturk, Dogacan S.; Hampton, Donald; Chakraborty, Shibaji; Owolabi, Charles; Keesee, Amy(2024-03)
We introduce a new framework called Machine Learning (ML) based Auroral Ionospheric
electrodynamics Model (ML‐AIM). ML‐AIM solves a current continuity equation by utilizing the ML model of
Field Aligned Currents of Kunduri ...
The Asian summer monsoon is one of the active synoptic scale weather phenomena, and has significant socioeconomic implications. A vast population relies on the associated precipitation, mostly dominating the agricultural ...
The boundary layer plays a vital role in governing the local atmospheric dynamics and meteorology, including the vertical transport of moisture, momentum, energy, and air pollutants. Hence, accurate parameterization of the ...
Sreekala, G.; Sebastian, Sijo; Michael, Manesh; Devi, E. Savithri; Anilkumar, C. P.; Venugopal, Chandu(2018)
206Alfvénic turbulence has been detected by Comet Halley at spacecrafts Giotto and Vega and by Comet Giacobini-Zinner at International Cometary Explorer (ICE). We have studied the KAW instability driven by field aligned ...
A generation mechanism for kinetic Alfvén waves
(KAWs) by ion-beam and velocity shear is discussed.
For this, a three-component plasma model, consisting of
cold background ions, hot electrons, and hot ion beams ...
Some of the linear macroinstabilities which can play important roles in space plasmas like the Earth's ionosphere and magnetosphere are discussed. Starting from the basic concept of plasma instabilities, we proceed to ...
The mesosphere/lower thermosphere (MLT) wind data from the 46 ground-based (GB) MF and meteor radar (MR) stations, located at the different latitudes over the globe, and the space-based (SB) HRDI data were used for ...
Pickett, J. S.; Kahler, S. W.; Chen, L.-J.; Huff, R. L.; Santolik, O.; Khotyaintsev, Y.; Décréau, P. M. E.; Winningham, D.; Frahm, R.; Goldstein, M. L.; Lakhina, G. S.; Tsurutani, B. T.; Lavraud, B.; Gurnett, D. A.; André, M.; Fazakerley, A.; Balogh, A.; Rème, H.(2004)
We report on recent measurements of solitary waves made by the Wideband Plasma Wave Receiver located on each of the four Cluster spacecraft at 4.5-6.5RE (well above the auroral acceleration region) as they cross field lines ...
Sojka, J.J.; Eccles, J.V.; Thiemann, H.; Sridharan, R.; Lakhina, G. S.; Rao, P. B.; Schunk, R.W.(2002)
An ionosphere model for a single, low-latitude, magnetic meridion is driven with observation-determined drivers to produce electron density specifications containing day to day ionospheric weather. The drivers are vertical ...
Ahmad, S. N. A.; Jusoh, M. H.; Kasran, F. A. M.; Abdullah, M.; Veenadhari, B.; Uozumi, T.; Abe, S.; Yoshikawa, A.; Cardinal, M. G.(2015)
This paper presents variations of Ultra Low Frequency
(ULF) and Very Low Frequency (VLF) during moderate
geomagnetic storm using ground based observatories, Magnetic
Data Acquisition System (MAGDAS)/Circum-Pan ...
South Atlantic Magnetic Anomaly (SAMA) due to its weak total geomagnetic field F is known to be a sink of trapped charged particles from the inner radiation belt during both magnetically quiet and disturbed periods. ...
Maharaj, S. K.; Bharuthram, R.; Singh, S. V.; Pillay, S. R.; Lakhina, G. S.(2011)
The existence of large amplitude double layers in a plasma composed of cold negative
dust, adiabatic positive dust, non-thermal ions and Boltzmann electrons is investigated using the
Sagdeev pseudopotential technique. ...