Michelin Guide to the Solar System

Sarah Lawday, Jérémy Lebreton, Axel Richard, Florence Gris

Illkirch, april 2008

The simple plots trip page.

 This page organizes all the computations of the departure and arrival windows. Therefore it is somewhat complex, and contains quite numerous options. We can : make a scan of all the launch opportunities during a certain interval of departrure and arrival times. This permits to see how the parameters for transfer orbits (orbital shape, initial velocity etc.) depend on the departure and arrival times, as well as to find e.g. the least costly way to reach the planet. show transfer orbit for given times of departure and arrival. show all trajectories departing from Earth at a given time and arriving at the planet at a given time. For the same trajectories, we can also show the travel times as a function of eccentricity. For the departure and the arrival you have to complete 3 boxes. In the first, you enter the number of points you want. In the second, you enter the year from which you want to make start your graph, knowing that 0.0 corresponds to the departure year of your travel. In the third, you enter the year until which you want to display the graph, in function of the start year.
 The plots in 2D You have access, thanks to the drop-down menu at the right top corner of the page, to many graphs in two dimensions. The first dimension is the time and the second is the parameter whose evolution we want to observe. You have the choice between the following graphs: - The radius (the distance between the spacecraft and the sun) -The distance -The radial velocity -The proper motion -The transit times

The plots in 3D

3 dimensional graphs display shall also be available. The third dimension is given by a coloured display, the X-axis shall be departure time, and the Y-axis the arrival time.

The purple areas indicate that there is a launch window where the value of the parameter displayed is low. On the contrary, if the color is near from red, it means that this value is high.

You have the choice between the following graphs:

 - depart speed - depart direction - dep.speed (Earth) - dep.direct.(Earth) - DeltaV from LPDO - Semi-maj. axis - eccentricity - period - orbits - arrival distance - body prop.motion - body rad.speed

 Summary What allows the advanced interface. The Orbit page. The simple trip plots. The slingshot trip plots. Simple Tutorial.