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Tropospheric Delay Calibration System Performance During the First Two BepiColombo Solar Conjunctions
Cappuccio, Paolo; Iess, Luciano; Tortora, Paolo +8 more
Media propagation delay and delay-rate induced by the water vapor within the Earth's troposphere represent one of the main error sources for radiometric measurements in deep space. In preparation for the BepiColombo and JUICE missions, the European Space Agency has installed and operates the prototype of a tropospheric delay calibration system (TD…
The Phase Response of a Rough Rectangular Facet for Radar Sounder Simulations of Both Coherent and Incoherent Scattering
Gerekos, C.; Haynes, M. S.; Schroeder, D. M. +1 more
With radar sounders, coherent backscattering simulations from global planetary digital elevation models (DEMs) typically display a deficit in diffuse clutter, which is mainly due to the implicit assumption that roughness at scales below the resolution of the DEM is absent. Indeed, while polynomial approximations of the phase evolution across the f…
Analysis of Two Selected Solar Events in 2011 and 2015 With Mars Express Radio Occultation Data
Witasse, Olivier; Sánchez-Cano, Beatriz; Karatekin, Ozgur +3 more
The temporal behavior of the Martian ionosphere is highly variable due to various dynamic processes including space weather events. Here, we study the effect of solar flares and coronal mass ejections (CMEs) on the Martian ionosphere for two selected solar events in 2011 and 2015, using the publicly available Mars EXpress (MEX) radio occultation (…