Venus Express science planning

Titov, D. V.; Svedhem, H.; Koschny, D.; Hoofs, Raymond; Barabash, S.; Bertaux, Jean-Loup; Drossart, P.; Formisano, V.; Häusler, B.; Korablev, Oleg; Markiewicz, W. J.; Nevejans, D.; Pätzold, M.; Piccioni, G.; Zhang, T.L.; Merritt, Donald; Witasse, Olivier; Zender, Joe; Accomazzo, Andrea; Sweeney, Mark; Trillard, D.; Janvier, Miho; Clochet, A.

doi:10.1016/j.pss.2006.04.017

Cited by 148 publications

(110 citation statements)

References 11 publications

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“…Operating since April 2006, the VEX (Titov et al, 2006;Svedhem et al, 2007) is in a polar orbit with a period of 24 h. Since the pericentre/apocentre distances are 250/66 000 km and that the periapsis occurs at around 78 • N, the satellite spends most of its time in the solar wind. Since VEX is a magnetically unclean spacecraft, VEX magnetometer instrument ) uses a dual sensor arrangement to enable the removal of stray magnetic fields generated by the operation of the spacecraft.…”

Section: Instrumentationmentioning

confidence: 99%

Occurrence rate of magnetic holes between 0.72 and 1 AU: comparative study of Cluster and VEX data

2011

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Abstract. Localised depressions in the magnetic field magnitude, or magnetic holes, are common features in many regions of solar system plasma. Two distinct mechanisms for their generation have been proposed. The first proposed that the structures are generated locally, close to the point of observation. The alternative has been proposed by Russell et al. (2008), who suggest that the observed magnetic holes represent nonlinear mirror structures that can be carried by the solar wind over vast distances of mirror stable plasma. According to Russell et al. (2008), magnetic holes are created in the vicinity of the sun and are convected by the solar wind outward. Periods of Cluster 1 and VEX data when both spacecraft were connected by the solar wind flow have been considered in this study, in order to determine the evolution of the magnetic holes occurrence rate. The comparison of the magnetic holes occurrence near the Venus and the Earth supports the Russell et al. (2008) premise that they are generated closer to the Sun most likely somewhere within the orbit of Mercury.

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Section: Instrumentationmentioning

confidence: 99%

Occurrence rate of magnetic holes between 0.72 and 1 AU: comparative study of Cluster and VEX data

2011

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“…The underlying concept is the 'Science Themes concept' which is already used on other ESA missions, e.g. Venus Express (Titov et al, 2006). It will ensure that even in a highly dynamical environment as around a comet the mission will return good scientific results.…”

Section: Discussionmentioning

confidence: 99%

Scientific Planning and Commanding of the Rosetta Payload

et al. 2007

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Abstract. ESA's Rosetta mission was launched in March 2004 and is on its way to comet 67P/Churyumov-Gerasimenko, where it is scheduled to arrive in summer 2014. It comprises a payload of 12 scientific instruments and a Lander. All instruments are provided by Principal Investigators, which are responsible for their operations.As for most ESA science missions, the ground segment of the mission consists of a Mission Operations Centre (MOC) and a Science Operations Centre (SOC). While the MOC is responsible for all spacecraft-related aspects and the final uplink of all command timelines to the spacecraft, the scientific operations of the instruments and the collection of the data and ingestion into the Planetary Science Archive are coordinated by the SOC. This paper focuses on the tasks of the SOC and in particular on the methodology and constraints to convert the scientific goals of the Rosetta mission to operational timelines.

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“…In-situ measurements are performed using the Solar Wind Analyzer instrumentation package from the Solar Orbiter mission (Marsch et al 2005), together with fluxgate magnetometers from Venus Express (Titov et al 2006), while remote measurements are performed using coronagraphs from the STEREO mission (Kaiser et al 2008).…”

Section: Payloadmentioning

confidence: 99%

A Space weather information service based upon remote and in-situ measurements of coronal mass ejections heading for Earth

Ritter

Meskers

Miles

et al. 2015

J. Space Weather Space Clim.

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The Earth's magnetosphere is formed as a consequence of interaction between the planet's magnetic field and the solar wind, a continuous plasma stream from the Sun. A number of different solar wind phenomena have been studied over the past 40 years with the intention of understanding and forecasting solar behavior. One of these phenomena in particular, Earth-bound interplanetary coronal mass ejections (CMEs), can significantly disturb the Earth's magnetosphere for a short time and cause geomagnetic storms. This publication presents a mission concept consisting of six spacecraft that are equally spaced in a heliocentric orbit at 0.72 AU. These spacecraft will monitor the plasma properties, the magnetic field's orientation and magnitude, and the 3D-propagation trajectory of CMEs heading for Earth. The primary objective of this mission is to increase space weather forecasting time by means of a near real-time information service, that is based upon in-situ and remote measurements of the aforementioned CME properties. The obtained data can additionally be used for updating scientific models. This update is the mission's secondary objective. In-situ measurements are performed using a Solar Wind Analyzer instrumentation package and fluxgate magnetometers, while for remote measurements coronagraphs are employed. The proposed instruments originate from other space missions with the intention to reduce mission costs and to streamline the mission design process. Communication with the six identical spacecraft is realized via a deep space network consisting of six ground stations. They provide an information service that is in uninterrupted contact with the spacecraft, allowing for continuous space weather monitoring. A dedicated data processing center will handle all the data, and then forward the processed data to the SSA Space Weather Coordination Center which will, in turn, inform the general public through a space weather forecast. The data processing center will additionally archive the data for the scientific community. The proposed concept mission allows for major advances in space weather forecasting time and the scientific modeling of space weather.

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Venus Express science planning

Cited by 148 publications

References 11 publications

Occurrence rate of magnetic holes between 0.72 and 1 AU: comparative study of Cluster and VEX data

Occurrence rate of magnetic holes between 0.72 and 1 AU: comparative study of Cluster and VEX data

Scientific Planning and Commanding of the Rosetta Payload

A Space weather information service based upon remote and in-situ measurements of coronal mass ejections heading for Earth

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