Search Publications
Self-consistent retrieval of temperature profiles and cloud structure in the northern hemisphere of Venus using VIRTIS/VEX and PMV/VENERA-15 radiation measurements
Kappel, D.; Arnold, G.; Haus, R.
Improved radiative transfer simulation and multi-window retrieval procedures (MWR) are described that are applied to investigate thermal structure and cloud features in the nightside atmosphere of Venus over the northern hemisphere. Comparative analyses of spectroscopic data, which were recorded independently in different parts of the infrared spe…
Nighttime photochemical model and night airglow on Venus
Krasnopolsky, Vladimir A.
The photochemical model for the Venus nighttime atmosphere and night airglow (Krasnopolsky, 2010, Icarus 207, 17-27) has been revised to account for the SPICAV detection of the nighttime ozone layer and more detailed spectroscopy and morphology of the OH nightglow. Nighttime chemistry on Venus is induced by fluxes of O, N, H, and Cl with mean hemi…
Toroidal and poloidal magnetic fields at Venus. Venus Express observations
Fedorov, A.; Barabash, S.; Lundin, R. +5 more
Magnetic field and plasma measurements carried out onboard Venus Express during solar minimum conditions suggest the existence of two kinds of magnetic field configuration in the Venusian ionosphere. We interpret these as the manifestation of two different types of generation mechanisms for the induced magnetosphere. A different magnetic field top…
A model of scattered thermal radiation for Venus from 3 to 5µm
Hueso, R.; Sánchez-Lavega, A.; García Muñoz, A. +2 more
Thermal radiation becomes a prominent feature in the continuum spectrum of Venus longwards of ∼3µm. The emission is traceable to the upper cloud and haze layers in the planet's mesosphere. Venus' thermal radiation spectrum is punctuated by CO2 bands of various strengths probing into different atmospheric depths. It is thus possibl…
A method to estimate optical distortion using planetary images
Imamura, Takeshi; Yamazaki, Atsushi; Kouyama, Toru +1 more
We developed a method to calibrate optical distortion parameters for axisymmetrical optical systems using images of a spherical target taken at a variety of distances. The method utilizes the fact that the influence of distortion on the apparent radius in the image changes with the disk size of the projected body. Because several planets can be us…