FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1661746898> ?p ?o ?g. }

• W1661746898 startingPage "369" @default.
• W1661746898 abstract "The Radio Science Experiment MaRS on Mars Express is sounding the Martian atmosphere and ionosphere using the spacecraft radio subsystem [1]. Within the atmosphere and ionosphere the atmospheric refraction alters the path geometry due to the radial variation of refractivity. The resulting frequency shift of the signal can be used to calculate the degree of bending, the ray periapsis, and the projection of the ray path onto the planetary surface. The refractivity of the atmosphere at the ray periapsis is obtained from the bending angle via an Abel transform [2]. The neutral number density is directly related to the refractivity profile through a constant factor C1 which depends on the atmospheric composition of the atmosphere. The temperature and pressure profiles follow in a next step covering the altitudes from the surface boundary layer up to ~50 km with a vertical resolution of only a few hundred metres. The highly elliptical orbit of Mars Express allows to study a large range of local times and locations and can therefore be used to investigate latitudinal, diurnal, and seasonal variations. More than 500 profiles of temperature, pressure and neutral number density have been obtained in six occultation seasons so far, mostly in the northern hemisphere covering all latitudes during almost all seasons. The high vertical resolution allows to investigate the strong variability of the surface boundary layer and to study temperature variations caused by eddies and waves. Several temperature profiles are located in the polar regions of both hemispheres. MaRS could observe the southern winter hemisphere during the second occultation season (OCC 2) at the end of 2004 (Ls ≈ 130°) and in 2008 (OCC 8, Ls ≈ 94°). The northern high latitudes were investigated during the third occultation season in 2005. 70 profiles covering all latitudes between 50° N and 76° N at solar longitudes between 259.6° and 289.5° were retrieved. The data set shows the seasonal variations in the high latitude range on both hemispheres, caused by CO2 condensation. The good latitudinal coverage during each occultation season gives information about the zonal circulation of the atmosphere. Figure 1 shows the pressure gradient at a geopotential surface of 10 km in the northern hemisphere for the third OCC season. A strong latitudinal pressure gradient and the influence of CO2 condensation over the course of the winter season can clearly be seen. The MaRS data set complements the MGS Radio Occultation data who achieved a broad longitudinal coverage in the high latitude range. Both data sets will be used to study seasonal changes. Figure 1: Pressure values at a geopotential altitude of 10 km for the third OCC season in 2005. Each dot indicates one measurement. The red dots show the first part of the OCC season, starting at mid latitudes and moving closer to the pole, the" @default.
• W1661746898 created "2016-06-24" @default.
• W1661746898 creator A5001072159 @default.
• W1661746898 creator A5033387153 @default.
• W1661746898 creator A5034183838 @default.
• W1661746898 creator A5070661266 @default.
• W1661746898 creator A5083009239 @default.
• W1661746898 date "2009-09-01" @default.
• W1661746898 modified "2023-09-24" @default.
• W1661746898 title "The Martian lower atmosphere as seen by the Radio Science Experiment MaRS on Mars Express" @default.
• W1661746898 hasPublicationYear "2009" @default.
• W1661746898 type Work @default.
• W1661746898 sameAs 1661746898 @default.
• W1661746898 citedByCount "0" @default.
• W1661746898 crossrefType "journal-article" @default.
• W1661746898 hasAuthorship W1661746898A5001072159 @default.
• W1661746898 hasAuthorship W1661746898A5033387153 @default.
• W1661746898 hasAuthorship W1661746898A5034183838 @default.
• W1661746898 hasAuthorship W1661746898A5070661266 @default.
• W1661746898 hasAuthorship W1661746898A5083009239 @default.
• W1661746898 hasConcept C116403925 @default.
• W1661746898 hasConcept C121332964 @default.
• W1661746898 hasConcept C127313418 @default.
• W1661746898 hasConcept C131980223 @default.
• W1661746898 hasConcept C145025062 @default.
• W1661746898 hasConcept C153294291 @default.
• W1661746898 hasConcept C2777034083 @default.
• W1661746898 hasConcept C2778600265 @default.
• W1661746898 hasConcept C2778835443 @default.
• W1661746898 hasConcept C45095769 @default.
• W1661746898 hasConcept C607359 @default.
• W1661746898 hasConcept C65440619 @default.
• W1661746898 hasConcept C8058405 @default.
• W1661746898 hasConcept C83260615 @default.
• W1661746898 hasConcept C87355193 @default.
• W1661746898 hasConcept C91586092 @default.
• W1661746898 hasConceptScore W1661746898C116403925 @default.
• W1661746898 hasConceptScore W1661746898C121332964 @default.
• W1661746898 hasConceptScore W1661746898C127313418 @default.
• W1661746898 hasConceptScore W1661746898C131980223 @default.
• W1661746898 hasConceptScore W1661746898C145025062 @default.
• W1661746898 hasConceptScore W1661746898C153294291 @default.
• W1661746898 hasConceptScore W1661746898C2777034083 @default.
• W1661746898 hasConceptScore W1661746898C2778600265 @default.
• W1661746898 hasConceptScore W1661746898C2778835443 @default.
• W1661746898 hasConceptScore W1661746898C45095769 @default.
• W1661746898 hasConceptScore W1661746898C607359 @default.
• W1661746898 hasConceptScore W1661746898C65440619 @default.
• W1661746898 hasConceptScore W1661746898C8058405 @default.
• W1661746898 hasConceptScore W1661746898C83260615 @default.
• W1661746898 hasConceptScore W1661746898C87355193 @default.
• W1661746898 hasConceptScore W1661746898C91586092 @default.
• W1661746898 hasLocation W16617468981 @default.
• W1661746898 hasOpenAccess W1661746898 @default.
• W1661746898 hasPrimaryLocation W16617468981 @default.
• W1661746898 hasRelatedWork W1553141673 @default.
• W1661746898 hasRelatedWork W1634134602 @default.
• W1661746898 hasRelatedWork W1915680810 @default.
• W1661746898 hasRelatedWork W1973108813 @default.
• W1661746898 hasRelatedWork W2009559972 @default.
• W1661746898 hasRelatedWork W2045446021 @default.
• W1661746898 hasRelatedWork W2053155721 @default.
• W1661746898 hasRelatedWork W2066329937 @default.
• W1661746898 hasRelatedWork W2075365899 @default.
• W1661746898 hasRelatedWork W2102499268 @default.
• W1661746898 hasRelatedWork W2110290543 @default.
• W1661746898 hasRelatedWork W2146146208 @default.
• W1661746898 hasRelatedWork W2155376768 @default.
• W1661746898 hasRelatedWork W2157725543 @default.
• W1661746898 hasRelatedWork W2473906279 @default.
• W1661746898 hasRelatedWork W2804783477 @default.
• W1661746898 hasRelatedWork W2989664828 @default.
• W1661746898 hasRelatedWork W3082209234 @default.
• W1661746898 hasRelatedWork W2461051940 @default.
• W1661746898 hasRelatedWork W262150607 @default.
• W1661746898 isParatext "false" @default.
• W1661746898 isRetracted "false" @default.
• W1661746898 magId "1661746898" @default.
• W1661746898 workType "article" @default.