The Martian ionosphere at solar minimum: Empirical model validation using MAVEN ROSE data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10475687" target="_blank" >RIV/00216208:11320/23:10475687 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=viSMdzL9np" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=viSMdzL9np</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.icarus.2021.114609" target="_blank" >10.1016/j.icarus.2021.114609</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Martian ionosphere at solar minimum: Empirical model validation using MAVEN ROSE data

Popis výsledku v původním jazyce

The Radio Occultation Science Experiment (ROSE; Withers et al., 2018, 2020) on the Mars Atmosphere and Volatile EvolutioN (MAVEN) satellite has produced over 400 electron density profiles from July 2016 to November 2019. These N-e(h) profiles occurred over a large range of solar zenith angles (54 degrees - 130 degrees) and solar flux conditions (24-54 solar flux units at Mars). One of the goals of the MAVEN mission is to characterize the status of the topside ionosphere at Mars as a reservoir of possible escaping plasma. Here we evaluate how ROSE topside ionospheric measurements, made predominantly under solar minimum conditions, compare with the only empirical model of the topside ionosphere (Nemec et al., 2019). To assess congruence between the model and the observations, a deviation factor (DF) is calculated for each predicted versus observed N-e(h) profile. Diurnally, low DFs (and thus higher agreement) occur for occultations with solar zenith angles (SZA) &lt; 82 degrees. On a longer time scale, lower solar fluxes tend to have higher DF values. Correlations of the maximum electron density (N-max) of each profile (predicted and observed) have an overall correlation coefficient (CC) of 0.96. Similarly, the observed total electron content of the topside ionosphere (TTEC) agrees with predictions (CC = 0.86). The model and the predictions differ most for the altitude of peak density (CC = 0.62 for SZA &lt; 90 degrees).

Název v anglickém jazyce

The Martian ionosphere at solar minimum: Empirical model validation using MAVEN ROSE data

Popis výsledku anglicky

The Radio Occultation Science Experiment (ROSE; Withers et al., 2018, 2020) on the Mars Atmosphere and Volatile EvolutioN (MAVEN) satellite has produced over 400 electron density profiles from July 2016 to November 2019. These N-e(h) profiles occurred over a large range of solar zenith angles (54 degrees - 130 degrees) and solar flux conditions (24-54 solar flux units at Mars). One of the goals of the MAVEN mission is to characterize the status of the topside ionosphere at Mars as a reservoir of possible escaping plasma. Here we evaluate how ROSE topside ionospheric measurements, made predominantly under solar minimum conditions, compare with the only empirical model of the topside ionosphere (Nemec et al., 2019). To assess congruence between the model and the observations, a deviation factor (DF) is calculated for each predicted versus observed N-e(h) profile. Diurnally, low DFs (and thus higher agreement) occur for occultations with solar zenith angles (SZA) &lt; 82 degrees. On a longer time scale, lower solar fluxes tend to have higher DF values. Correlations of the maximum electron density (N-max) of each profile (predicted and observed) have an overall correlation coefficient (CC) of 0.96. Similarly, the observed total electron content of the topside ionosphere (TTEC) agrees with predictions (CC = 0.86). The model and the predictions differ most for the altitude of peak density (CC = 0.62 for SZA &lt; 90 degrees).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LTAUSA17070" target="_blank" >LTAUSA17070: Elektromagnetické vlny v planetárních ionosférách a magnetosférách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Icarus

ISSN

0019-1035

e-ISSN

1090-2643

Svazek periodika

393

Číslo periodika v rámci svazku

15 Mar

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

114609

Kód UT WoS článku

000953437500001

EID výsledku v databázi Scopus

2-s2.0-85111279739