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Venus Express Pericentre Altitude Evolution

Venus Express Pericentre Altitude Evolution

Date: 15 July 2008
Satellite: Venus Express
Depicts: Pericentre altitude evolution between July 2008-March 2009
Copyright: ESA

This plot shows the planned evolution of the pericentre altitude during the pericentre lowering activities in July/August 2008. 

Over a period of about four weeks, the pericentre of the orbit is permanently lowered from the former range of 250-400 km to 185-300 km. The lowering is done in four steps at one-week intervals.

Each step includes two manoeuvres: one at pericentre to raise the apocentre altitude, and one at apocentre during the next orbit to lower the pericentre altitude. The combined effect of each pair of manoeuvres will leave the orbital period largely unchanged.

Pericentre lowering OCM Target altitude
14 July 2008 OCM #1 220 km
21 July 2008 OCM #2 200 km
28 July 2008 OCM #3 190 km
04 August 2008 OCM #4 185 km

OCM = orbit control manoeuvre

The inset shows the period around the time when the 185 km altitude will be reached. Also plotted is the expected evolution over the subsequent months, including the first quarter of 2009.

Last Update: 1 September 2019
13-Jun-2024 23:24 UT

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