If that, too, goes well, three days later the periapsis will be again lowered by 10 km.After that, the lowering will happen in smaller increments.The burns are taking place between 15 March and 6 April.Yesterday's was the biggest, delivering a planned ‘delta-v’ (change in velocity) of about 3 m/sec.
It means to perform a stunt on a longboard in which a surfer moves to the front of the board and rides with ten toes extended out over the nose, after positioning the board so the back of it is covered and held in place by a wave.#hang10 #aeb #aerobraking Following months of extremely hard work by the mission control team at ESOC, the science team at ESAC, the Exo Mars project team at ESTEC and industry, the Big Day has finally arrived!At UTC ( CET) yesterday, the Exo Mars Trace Gas orbiter (TGO) executed the first of a series of seven thruster burns that will lower its orbit, step-wise, until it starts ‘feeling’ the wispy faint drag () due to the atmosphere of Mars.This will be the routine orbit for the main science phase, and is optimised both for science data-gathering and to enable TGO to serve as a radio relay platform, transmitting signals from surface assets like rovers to Earth.“It’s a great technique for saving fuel, which means our spacecraft could be designed, built and launched without needing to lug along hundreds of kilogrammes of extra fuel  to conduct the long engine burns that would otherwise be necessary,” says Spacecraft Operations Manager Peter Schmitz.
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Deputy Operations Manager Silvia Sangiorgi sits on console at right. And there won’t be much time available to react in case anything unexpected happens.“Aerobraking will be especially demanding for our flight dynamics experts, who must conduct regular and frequent orbit determinations so that we know exactly where the spacecraft is, which is necessary for things like planning ground station communication passes,” says Peter.Gone surf'in One of the big factors the team will have to accommodate is the unpredictability of the Martian atmosphere. The Mars atmosphere, comprising mainly carbon dioxide, is very thin in comparison to Earth, and its density is highly changeable.“The resulting atmospheric passes, one per day, go in deep enough to let the spacecraft experience some real air drag, so the mission team can see how the spacecraft stands up to actual aerobraking conditions.” “However, at a minimum altitude of 150 km, the heating and forces will not be strong enough to cause any risk of damage even if the spacecraft does not behave as planned.” If the first three days go as expected, there will be another manoeuvre to lower the periapsis altitude to 140 km, on 18 March.
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That will significantly up the ante, exposing the spacecraft to notably higher aerodynamic loads.Close to the surface, its temperature and density are affected by variables such as the weather, dust storms, sunlight and hard-to-predict (in real-time) effects such as solar heating of the surface (causing convection currents).At the very upper altitudes, around 113 km where TGO will begin aerobraking orbits, it is extremely thin, with a density on the order of just 10^, and solar activity and dust storms can have a big effect on density.) Mainz - Grenzenlos [email protected] KUZ Berlin - Frannz Jena - Rosenkeller Frankfurt - Das Bett Stuttgart - Merlin München - Feierwerk Miltenberg - Beavers Köln - Tsunami Osnabrück - Kleine Freiheit Göttingen – Nörgelbuff Hamburg - Knust Magdeburg - Feuerwache Grevenbroich - Museum Villa Erckens * Luxembourg/Dudelange – The Singer and The Song Festival * Wawern – Alte Synagoge * (Landkreis Trier-Saarburg!!!) Offenbach - Bücherfest Rhein-Main Offenbach 2010 @ Hafen 2 * Bochum - Bochumer Musiksommer Festival Münster - Gleiss 22 (Lloyd Cole support) Oberursel - Portstrasse * Wedemark - Brelinger Mitte * Hamburg – Zeise Kino* Berlin - Bar im Deutschen Theater ** Magdeburg – Moritzhof ** Aachen – Raststätte ** Bonn – Mausefalle ** Frankfurt – Ponyhof ** Regensburg – Heimat ** Nürnberg – Club Stereo ** Würzburg - Pleiher Hof ** München – Cord ** Wawern – Ehemalige Synagoge ** Hamburg - Deutsches Schauspielhaus Kantine ** Emden - Apollo Theater ** Husum - Speicher**2009: Bremen - MS Treue* Oberursel - Portstrasse* Hamburg, Kulturhaus 73 - Melodica Acoustic Festival* Alfeld - Cafe Live (*) Saarbrücken - Sparte 4 (*) Tübingen – Zimmertheater (*) CH-Schaffhausen - Fassbeiz (*) support: Ari Hest Giessen - Ulenspiegel (*) support: Ari Hest Düsseldorf - Pretty Vacant (*) support: Ari Hest Münster - Amp (*) Kiel - Pumpe Duisburg - Parkhaus Aachen - Musikbunker Bielefeld - Bunker Ulmenwall Wuppertal - LCB Osnabrück - Lagerhalle Berlin - SO 36 Hannover - Musikzentrum Hamburg - Knust Stockholm (Sweden) - Landet (*) Göteborg (Sweden) - Mitt andra hem (*) Sylt - Buhne 16 Longboard Festival * Hannover - Boot Boo Hook Festival ( Band!