Search Results - "Ambili, K. M."

Three-dimensional distribution of ions and electrons in the lunar ionosphere originated from the photochemical reactions by Ambili, K M, Choudhary, R K

“…ABSTRACT Using a fluid-based time-dependent numerical photochemical model, the three-dimensional distribution of ions and electrons in the lunar ionosphere,…”
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On the origin and characteristic features of the V1 layer in Venus ionosphere using Akatsuki radio science experiment and the one-dimensional photochemical model by Ambili, K M, Tripathi, K R, Choudhary, R K, Imamura, T

“…ABSTRACT Using the radio science experiment onboard the Akatsuki spacecraft and an in-house developed one-dimensional photochemical model (1D-PCM)…”
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Characteristic Features of V0 Layer in the Venus Ionosphere as Observed by the Akatsuki Orbiter: Evidence for Its Presence During the Local Noon and Post‐Sunset Conditions by Tripathi, Keshav R., Choudhary, R. K., Ambili, K. M., Imamura, T., Ando, H.

“…Characteristic features of the Venus ionosphere below the V1 base, named as V0 layer, have been studied using the Radio Science payload onboard Akatsuki…”
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Do Solar Energetic Particle (SEP) Events Influence the Formation of the V0 Layer in the Venusian Ionosphere? by Tripathi, Keshav R., Imamura, T., Choudhary, R. K., Sánchez–Cano, Beatriz, Ambili, K. M.

“…This study investigates the potential impact of Solar Energetic Particles (SEPs) on the V0 layer of the Venus ionosphere. Electron density profiles obtained…”
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Gravity Wave Modulations at the Lower Altitudes of Venus Ionosphere by Tripathi, Keshav R., Choudhary, R. K., Jose, Jeslin S., Ambili, K. M., Imamura, T.

“…Using measurements from radio science experiments onboard Venus Express and Akatsuki orbiter, we explore factors that control the occurrence and spatial…”
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A study on the evolution of plasma bubbles using the single station‐multisatellite and multistation‐single satellite techniques by Unnikrishnan, K., Sreekumar, H., Choudhary, R. K., Ashna, V. M., Ambili, K. M., Shreedevi, P. R., Rao, P. B.

“…The characteristics of plasma bubble‐induced ionospheric irregularities were analyzed by estimating the drift velocity of plasma bubbles, their percentage of…”
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Venusian Ionosphere During Deep Solar Minima: Some New Insights Using Akatsuki Radio Science Experiment by Tripathi, Keshav R., Choudhary, R. K., Ambili, K. M., Imamura, T.

“…The characteristic features of different layers in the Venus ionosphere during the deep solar minimum of the solar cycle 24 have been studied using a radio…”
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Nighttime vertical plasma drifts and the occurrence of sunrise undulation at the dip equator: A study using Jicamarca incoherent backscatter radar measurements by Ambili, K. M., Choudhary, R. K., St.-Maurice, J.-P., Chau, Jorge L.

“…The absence of photoionization, in combination with sustained downward plasma motion at night, means that the F region can be severely depleted at the magnetic…”
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Local electrodynamics of a solar eclipse at the magnetic equator in the early afternoon hours by St.-Maurice, J.-P., Ambili, K. M., Choudhary, R. K.

“…The path of maximum obscuration for the annular solar eclipse of January 15, 2010, crossed the magnetic equator at Trivandrum, India, in the early afternoon…”
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On the sunrise oscillation of the F region in the equatorial ionosphere by Ambili, K. M., St.-Maurice, J.-P., Choudhary, R. K.

“…This paper shows that, contrary to previous explanations, the apparent undulating motion of the equatorial F region peak at sunrise is produced by…”
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A Numerical Study on the Impact of E × B Drift on the Vertical Distribution of the Plasma Density Over the Geomagnetic Equatorial Ionospheric Region by Ashok, Arya, Ambili, K. M., Choudhary, R. K.

“…Using an in–house developed Quasi Two–Dimensional (QTD) physics–based ionospheric model, the impact of E × B drift velocity on the vertical distribution of the…”
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On the role of minor neutrals in determining the characteristic features of the Venus ionosphere at low altitudes by Ambili, K M, Choudhary, R K, Tripathi, K R

“…ABSTRACT Electron density profiles obtained from radio occultation experiments reveal significant ionization occurring at altitudes below 120 km in the…”
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The Response of the D and E Regions of the Equatorial Ionosphere to Solar Flare Events by Gopika, P. G., Ambili, K. M., Choudhary, R. K.

“…Using measurements from a ground‐based magnetometer and an in‐house developed quasi‐two‐dimensional theoretical ionospheric model (QTD), the differential…”
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Impact of the high-speed solar wind stream over the low-latitude ionospheric system – a study combining Indian MOM and InSWIM observations by Jain, Richa N, Choudhary, R K, Ambili, K M, Roopa, M V, Dai, Bijoy K

“…ABSTRACT In this study, we map the origin, acceleration, and propagation of the high-speed solar wind streams (HSS) and observe their impact on the…”
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A study on the characteristic features of the lunar ionosphere using dual frequency radio science (DFRS) experiment onboard Chandrayaan-2 orbiter by Tripathi, Keshav R, Choudhary, R K, Ambili, K M, Bindu, K R, Manikantan, R, Parikh, Umang

“…ABSTRACT We present ‘first of its kind’ measurements of the enhanced integrated electron density profiles (iEDPs) at the lunar wake and trans-terminator…”
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On the origin of the ionosphere at the Moon using results from Chandrayaan‐1 S band radio occultation experiment and a photochemical model by Choudhary, R. K., Ambili, K. M., Choudhury, Siddhartha, Dhanya, M. B., Bhardwaj, Anil

“…The origin of the Moon's ionosphere has been explored using Chandrayaan‐1 radio occultation (RO) measurements and a photochemical model. The electron density…”
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The impact of the January 15, 2010, annular solar eclipse on the equatorial and low latitude ionospheric densities by Choudhary, R. K., St.-Maurice, J.-P., Ambili, K. M., Sunda, Surendra, Pathan, B. M.

“…The January 15, 2010, solar annular eclipse crossed the magnetic equator in the middle of the day over India, in a region instrumented with several…”
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On the relative roles of the neutral density and photo chemistry on the solar zenith angle variations in the V2 layer characteristics of the Venus ionosphere under different solar activity conditions by Ambili, K M, Babu, Sneha Susan, Choudhary, R K

“…Using an in-house developed one dimensional photo-chemical model (1D-PCM), which considers production and loss of 11 ions namely, CO _{2}^{+}, CO^{+},…”
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Seasonal differences in the sunrise undulations at the dip equator at solar minimum at two distinct locations and their relation with postsunset electrodynamics by Ambili, K. M., Choudhary, R. K., St.-Maurice, J.-P.

“…A sunrise undulation (SU) is observed by ionosondes when new ionization is produced at sunrise in the upper F region at the geomagnetic equator. It creates a…”
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The role of the storm-time prompt penetrating electric field on the net distribution of plasma density over the low latitude ionospheric regions by Ambili, K.M., Choudhary, R.K.

“…The relative role of the prompt penetration of electric fields and neutral winds in the distribution of ionospheric plasma during geomagnetic storms over the…”
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