DOI: 10.1029/2018JA025263
Scopus记录号: 2-s2.0-85050622413
论文题名: Mars Initial Reference Ionosphere (MIRI) Model: Updates and Validations Using MAVEN, MEX, and MRO Data Sets
作者: Mendillo M. ; Narvaez C. ; Trovato J. ; Withers P. ; Mayyasi M. ; Morgan D. ; Kopf A. ; Gurnett D. ; Němec F. ; Campbell B.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 7 起始页码: 5674
结束页码: 5683
语种: 英语
英文关键词: ionospheric modeling
; Mars Initial Reference Ionosphere
; Mars ionosphere
英文摘要: The Mars Initial Reference Ionosphere (MIRI) model is a semiempirical formulation designed to provide climatological estimates of key parameters of the Martian ionosphere. For the new MIRI-2018 version, an expanded database is used from the Mars Express/Mars Advanced Radar for Subsurface and Ionosphere Sounding/Active Ionospheric Sounding (MEX/MARSIS/AIS) instrument, consisting of 215,818 values of maximum electron density of the M2-layer (NmM2) from the years 2005–2015. These data are organized by photochemical-equilibrium equations to obtain a functional dependence of NmM2 upon solar drivers (flux and solar zenith angle). The resulting peak density is used to calibrate normalized electron density profiles [Ne (h)] derived from theory and an empirical model. The MIRI-2018 thus provides estimates of NmM2, Ne (h), and total electron content (TEC) for any date past or future. Validation using Mars Atmosphere and Volatile EvolutioN (MAVEN)'s new radio occultation science experiment (ROSE) was successful for NmM2 values, but MIRI was found to overestimate TEC values. The validation failure for TEC was traced to overestimates of plasma at low altitudes (M1 layer). A separate module for TEC was derived using 126,055 values from the Mars Reconnaissance Orbiter/SHAllow RADar (MRO/SHARAD) TEC database from 2006 to 2014. Validation of this new TEC module with ROSE data was successful. Future improvements to MIRI-2018 require new ways to characterize the bottomside ionosphere's contribution to the TEC integral for midday (low solar zenith angle) conditions. This requires new simulation studies of secondary ionization rates by photoelectrons produced via the primary X-ray ionization process for the M1 layer. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113554
Appears in Collections: 气候减缓与适应
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作者单位: Center for Space Physics, Boston University, Boston, MA, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States; Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic; Center for Earth and Planetary Studies, Smithsonian Institution, Washington, DC, United States
Recommended Citation:
Mendillo M.,Narvaez C.,Trovato J.,et al. Mars Initial Reference Ionosphere (MIRI) Model: Updates and Validations Using MAVEN, MEX, and MRO Data Sets[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)