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Found 11 entries in the Bibliography.
Showing entries from 1 through 11
2022 |
Nitric Oxide is a very important trace species which plays a significant role acting as a natural thermostat in Earth’s thermosphere during strong geomagnetic activity. In this paper, we present various aspects related to the variation in the NO Infrared radiative flux (IRF) exiting the thermosphere by utilizing the TIMED/SABER (Thermosphere Ionosphere Mesosphere Energetics and Dynamics/ Sounding of the Atmosphere using Broadband Emission Radiometry) observational data during the Halloween storm which occurred in late Octo ... Ranjan, Alok; Krishna, MV; Kumar, Akash; Sarkhel, Sumanta; Bharti, Gaurav; Bender, Stefan; Sinnhuber, Miriam; Published by: Advances in Space Research Published on: YEAR: 2022   DOI: 10.1016/j.asr.2022.07.035 |
2021 |
This work analyzes the geo-effectiveness of Coronal Mass Ejection- (CME-) induced storms by investigating the responses of ionospheric Vertical Total Electron Content (VTEC) and the Equatorial Ionization Anomaly (EIA) over the Indian sector to two storms. One of the storms occurred on February 19, 2014 (SYM-H: −120 nT), while the other occurred on June 23, 2015 (SYM-H: −204 nT). Both storms were driven by full halo CMEs. Global TEC maps were used to characterize VTEC variations during the storms. June 23, 2015 storm was ... Simi, K.; Akala, A.; Krishna, Siva; Amaechi, Paul; Ogwala, Aghogho; Ratnam, Venkata; Oyedokun, O.; Published by: Advances in Space Research Published on: oct YEAR: 2021   DOI: 10.1016/j.asr.2021.06.013 Coronal mass ejection; Disturbance dynamo electric field; geomagnetic storm; prompt penetration electric field; total electron content |
The impact of a stealth CME on the Martian topside ionosphere Solar cycle 24 is one of the weakest solar cycles recorded, but surprisingly the declining phase of it had a slow coronal mass ejection (CME) that evolved without any low coronal Thampi, Smitha; Krishnaprasad, C; Nampoothiri, Govind; Pant, Tarun; Published by: Monthly Notices of the Royal Astronomical Society Published on: YEAR: 2021   DOI: 10.1093/mnras/stab494 |
2019 |
Radiative cooling due to NO at 5.3 The effect of geomagnetic storms on the peak emission of NO Volume Emission Rate (NO VER) at 5.3 m, in mesosphere and lower thermosphere (MLT) region, is studied over the Asian sector during 26\textendash29 September 2011 (storm 1) and 18\textendash21 February 2014 (storm 2). The data for peak emission of NO VER is obtained from SABER instrument onboard the NASA\textquoterights TIMED satellite. The SABER retrieved data along with the neutral densities obtained from NRLMSISE-00 model have been used to study the latitudinal ... Bharti, Gaurav; Krishna, M.V.; Singh, Vir; Published by: Advances in Space Research Published on: 11/2019 YEAR: 2019   DOI: 10.1016/j.asr.2019.07.016 |
Radiative cooling due to NO at 5.3 $\mu$m emission as observed by TIMED/SABER over Asian sector The effect of geomagnetic storms on the peak emission of NO Volume Emission Rate (NO VER) at 5.3 μ m, in mesosphere and lower thermosphere (MLT) region, is studied over the Bharti, Gaurav; Krishna, MV; Singh, Vir; Published by: Advances in Space Research Published on: YEAR: 2019   DOI: 10.1016/j.asr.2019.07.016 |
2018 |
Storm Time Variation of Radiative Cooling by Nitric Oxide as Observed by TIMED-SABER and GUVI The variation of O/N2 (reference to N2 column density 1017\ cm-2) and nitric oxide radiative emission flux exiting the thermosphere have been studied over the Northern Hemisphere during the superstorm event of 7\textendash12 November 2004. The data have been obtained from Global Ultraviolet Imager (GUVI) and Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) on board the National Aeronautics and Space Administration (NASA)\textquoterights Thermosphere, I ... Bharti, Gaurav; Sunil~Krishna, M.; Bag, T.; Jain, Puneet; Published by: Journal of Geophysical Research: Space Physics Published on: 01/2018 YEAR: 2018   DOI: 10.1002/2017JA024576 |
Published by: 42nd COSPAR Scientific Assembly Published on: |
2017 |
Storm-time variation of radiative cooling by Nitric Oxide as observed by TIMED-SABER and GUVI
Krishna, Sunil; Bharti, Gaurav; Bag, Tikemani; Published by: Published on: |
2016 |
Storm time variation of radiative cooling of thermosphere by nitric oxide emission
Krishna, MV; Bag, Tikemani; Bharti, Gaurav; Published by: 41st COSPAR Scientific Assembly Published on: |
2015 |
Radiative cooling by NO emission observed by TIMED/SABER over Asian sector
Published by: Published on: |
2012 |
GPS-TEC variations during low solar activity period (2007--2009) at Indian low latitude stations The paper is based on the ionospheric variations in terms of vertical total electron content (VTEC) for the low solar activity period from May 2007 to April 2009 based on the analysis of dual frequency signals from the Global Positioning System (GPS) satellites recorded at ground stations Varanasi (Geographic latitude 25\textd ... Kumar, Sanjay; Priyadarshi, S.; Krishna, Gopi; Singh, A.; Published by: Astrophysics and Space Science Published on: 05/2012 YEAR: 2012   DOI: 10.1007/s10509-011-0973-6 geomagnetic storm; GPS; Ionospheric total electron contents; IRI model |
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