Explanipedia

The Impact of Geomagnetic Activity on the Height‐Dependent Ionospheric Delay in Relation to Solar Activity Open

Rajesh Vaishnav, Christoph Jacobi, Erik Schmölter, Hanna Dühnen · 2025

Previous research has indicated that geomagnetic activity plays an important role in influencing the ionospheric delayed response to solar activity variations at the solar rotation time scale depending on solar activity conditions. In this…

Delayed Ionospheric Response to Solar Activity: Influence of Geomagnetic Activity Open

Rajesh Vaishnav, Christoph Jacobi, Erik Schmölter, Hanna Dühnen · 2025

The role of geomagnetic activity in the delayed response of the ionosphere along with the solar influences was investigated through a series of controlled simulations of the National Center for Atmospheric Research Thermosphere‐Ionosphere‐…

Comparative case study of delayed ionospheric response to a superposed 27-day solar rotation signal Open

Hanna Dühnen, Rajesh Vaishnav, Christoph Jacobi, Erik Schmölter, Jens Berdermann · 2024

Major ionization processes in the upper atmosphere are driven by the solar extreme ultraviolet (EUV) radiation causing corresponding responses in ionospheric observables. The response to the 27-day solar rotation period is of particular in…

Influence of Lower Atmospheric Variability: An Investigation of Delayed Ionospheric Response to Solar Activity Open

Rajesh Vaishnav, Christoph Jacobi, Erik Schmölter, Hanna Dühnen · 2024

This study aims to examine the impact of lower atmospheric forcing on upper atmospheric variability using the Thermosphere‐Ionosphere‐Electrodynamics General Circulation Model (TIEGCM). We conducted numerical experiments comparing induced …

Spatial Features of the Delayed Ionospheric Response During Low and High Solar Activity Open

Erik Schmölter, Hanna Dühnen, Jens Berdermann, Rajesh Vaishnav, Christoph Jacobi · 2024

The ionospheric response to solar 27‐day signatures has complex temporal and spatial variations, which are driven by short‐ and long‐term changes of the solar activity among other processes (e.g., geomagnetic activity). A delay between the…

Long Term Functional Outcomes in Patients with Covid-19 Requiring Extracorporeal Membranous Oxygenation Support Open

John Eisenga, Kristen McCullough, Ghassan Moubarak, Emily Shih, Rajesh Vaishnav , et al. · 2024

Solar variability and delayed ionospheric response: Insights from complex 27-day solar EUV signatures Open

Hanna Dühnen, Rajesh Vaishnav, Erik Schmölter, Christoph Jacobi · 2024

The solar extreme ultraviolet (EUV) radiation drives the major ionization processes in the upper atmosphere. Its variability causes a related response in ionospheric observables. Especially of interest is the delayed response of electron d…

Solar activity variations in the composition of the low- and mid-latitude ionosphere-thermosphere system Open

Rajesh Vaishnav, Christoph Jacobi, Erik Schmölter, Hanna Dühnen, M. Codrescu · 2024

Having a comprehensive understanding of the ionosphere's irregular behavior and its response to solar activity is crucial for satellite communication and navigation applications. The sun's extreme ultraviolet (EUV) and ultraviolet (UV) rad…

Ionospheric Response to Solar EUV Radiation Variations Using GOLD Observations and the CTIPe Model Open

Rajesh Vaishnav, Christoph Jacobi, Jens Berdermann, Erik Schmölter, Hanna Dühnen , et al. · 2023

To understand the global response of thermospheric‐ionospheric (TI) parameters to variations in solar irradiance measurements from the Global‐Scale Observations of the Limb and Disk (GOLD) ultraviolet imaging spectrograph, solar radio flux…

CTIPe model simulations Open

Rajesh Vaishnav · 2023

Simulation output such as atomic oxygen to molecular nitrogen ratio (O/N2), peak electron density (NmF2), and total electron content (TEC) from the Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) model for 2019-2021. T…

CTIPe model simulations Open

Rajesh Vaishnav · 2023

Simulation output such as atomic oxygen to molecular nitrogen ratio (O/N2), peak electron density (NmF2), and total electron content (TEC) from the Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) model for 2019-2021. T…

Reaction of the Upper Atmosphere to the 27-d Solar Cycle - Comparison of CTIPe and TIE-GCM Simulations to Observations Open

Hanna Dühnen, Rajesh Vaishnav, Erik Schmölter, Christoph Jacobi · 2023

Solar EUV radiation is the dominant driver for upper atmosphere ionization. Ionospheric variations that affect radio signal propagation and thus affect technical systems such as satellite-based positioning systems. One significant time sca…

Modeling the ionospheric delayed response to solar rotation period changes in EUV radiation Open

Rajesh Vaishnav, Christoph Jacobi, Erik Schmölter, Hanna Dühnen, Jens Berdermann , et al. · 2023

The thermosphere-ionosphere system changes significantly on various temporal scales due to the forcings from solar and geomagnetic processes, and the lower atmosphere. The 27-day variation caused by solar rotation is one of the most import…

Delayed ionospheric response to solar extreme ultraviolet radiation variations: A modeling approach Open

Rajesh Vaishnav, Christoph Jacobi, Jens Berdermann, Erik Schmölter, M. Codrescu · 2021

Role of eddy diffusion in the delayed ionospheric response to solar flux changes Open

Rajesh Vaishnav, Christoph Jacobi, Jens Berdermann, M. Codrescu, Erik Schmölter · 2021

Simulations of the ionospheric response to solar flux changes driven by the 27 d solar rotation have been performed using the global 3-D Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) physics-based numerical model. Us…

Reply on RC2 Open

Rajesh Vaishnav · 2021

Abstract. Simulations of the ionospheric response to solar flux changes driven by the 27 d solar rotation have been performed using the global 3-D Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) physic…

Ionospheric response to solar extreme ultraviolet radiation variations: comparison based on CTIPe model simulations and satellite measurements Open

Rajesh Vaishnav, Erik Schmölter, Christoph Jacobi, Jens Berdermann, M. Codrescu · 2021

The ionospheric total electron content (TEC) provided by the International GNSS Service (IGS) and the TEC simulated by the Coupled Thermosphere Ionosphere Plasmasphere Electrodynamics (CTIPe) model have been used to investigate the delayed…

Comment on angeo-2021-12 Open

Rajesh Vaishnav, Christoph Jacobi, Jens Berdermann, M. Codrescu, Erik Schmölter · 2021

Abstract. Simulations of the ionospheric response to solar flux changes driven by the 27 d solar rotation have been performed using the global 3-D Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) physic…

Reply on RC1 Open

Rajesh Vaishnav · 2021

Abstract. Simulations of the ionospheric response to solar flux changes driven by the 27 d solar rotation have been performed using the global 3-D Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) physic…

Comment on angeo-2021-12 Open

Rajesh Vaishnav, Christoph Jacobi, Jens Berdermann, M. Codrescu, Erik SchmÃ¶lter · 2021

Abstract. Simulations of the ionospheric response to solar flux changes driven by the 27âd solar rotation have been performed using the global 3-D Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) phys…

Role of Eddy Diffusion in the Delayed Ionospheric Response toSolar Flux Changes Open

Rajesh Vaishnav, Christoph Jacobi, Jens Berdermann, M. Codrescu, Erik Schmölter · 2021

Simulations of the ionospheric response to solar flux changes driven by the twenty-seven days solar rotation have been performed using the global 3-D Coupled Thermosphere/Ionosphere Plasmasphere electrodynamics (CTIPe) physics- based numer…

Response to Referee #1 Open

Rajesh Vaishnav · 2021

Response to anonymous Referee #2 Open

Rajesh Vaishnav · 2021

Ionospheric Response to Solar EUV Radiation Variations:Comparison based on CTIPe Model Simulations and SatelliteMeasurements Open

Rajesh Vaishnav, Erik Schmölter, Christoph Jacobi, Jens Berdermann, M. Codrescu · 2020

The ionospheric Total Electron Content (TEC) provided by the International GNSS Service (IGS), and the Coupled Thermosphere Ionosphere Plasmasphere Electrodynamics (CTIPe) model simulated TEC have been used to investigate the delayed ionos…

Analysis of the middle atmospheric ozone using SABER observations: a study over mid-latitudes in the northern and southern hemispheres Open

Vaidehi Joshi, Som Sharma, Kondapalli Niranjan Kumar, Nisha Patel, Prashant Kumar , et al. · 2020

Long-term trends in the ionospheric response to solar extreme-ultraviolet variations Open

Rajesh Vaishnav, Christoph Jacobi, Jens Berdermann · 2019

The thermosphere–ionosphere system shows high complexity due to its interaction with the continuously varying solar radiation flux. We investigate the temporal and spatial response of the ionosphere to solar activity using 18 years (1999–2…

Revision 2 Open

Rajesh Vaishnav · 2019

Revision 1 Open

Rajesh Vaishnav · 2019

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Rajesh Vaishnav · 2019

Reply for Reviewer2 Open

Rajesh Vaishnav · 2019

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