Search Publications
Frequency fluctuations of coherent signals from spacecraft observed during dual-frequency radio sounding of the circumsolar plasma in 2004-2008
Pätzold, M.; Bird, M. K.; Efimov, A. I. +4 more
We have performed spectral processing of the data of experiments on radio sounding of circumsolar plasma by coherent S- and X-band signals from the spacecraft Ulysses, Mars Express, Rosetta, and Venus Express carried out from 1991 to 2009. The experiments were realized in the mode of coherent response, when a signal stabilized by the hydrogen stan…
Investigation of oxygen O2(a1Δ g ) emission on the nightside of Venus: Nadir data of the VIRTIS-M experiment of the Venus Express mission
Drossart, P.; Piccioni, G.; Shakun, A. V. +2 more
The paper is devoted to studies of the oxygen 1.27 µm emission on the Venus nightside using nadir measurements with the imaging spectrometer VIRTIS. A map of the emission distribution in coordinates latitude-local time is drawn for the southern hemisphere, equatorial region, and low latitudes of the northern hemisphere on the basis of observ…
Venus Express: Scientific goals, instrumentation, and scenario of the mission
Barabash, S.; Zhang, T. L.; Bertaux, J. -L. +23 more
The first European mission to Venus (Venus Express) is described. It is based on a repeated use of the Mars Express design with minor modifications dictated in the main by more severe thermal environment at Venus. The main scientific task of the mission is global exploration of the Venusian atmosphere, circumplanetary plasma, and the planet surfac…
Exploration of Venus with the Venera-15 IR Fourier spectrometer and the Venus Express planetary Fourier spectrometer
Ignatiev, N. I.; Zasova, L. V.; Formisano, V. +2 more
The infrared spectrometry of Venus in the range 6-45 µm allows one to sound the middle atmosphere of Venus in the altitude range 55-100 km and its cloud layer. This experiment was carried out onboard the Soviet automatic interplanetary Venera-15 station, where the Fourier spectrometer for this spectral range was installed. The measurements h…