The European Space Agency reported on October 12 that a full-size twin of the Rosalind Franklin rover had practised its first drive from a simulated landing platform during a two-month test campaign on Earth. The model, Amalia, rehearsed the egress manoeuvre more than 20 times across Mars-like terrain. Leaving the lander is a small-looking step with unusually high stakes: a rover cannot conduct its planned surface science until it reaches the ground safely.
Why the first drive is so critical
A rover must descend from its landing platform without getting stuck, tipping or damaging wheels and instruments. The ramps, terrain and local geometry determine what paths are possible. ESA’s test campaign recreated reduced gravity, an incline and obstacles beneath the ramps. Rehearsing repeatedly lets engineers understand the sequence and identify issues before attempting the operation on Mars, where remote intervention is limited by communication delays.
What the rover twin does
Amalia is a full-size test model used to practise the movement and understand how the rover behaves while leaving its platform. It is not the flight rover exploring Mars; it is an engineering stand-in for rehearsing difficult operations. Tests with a physical model can expose interactions between wheels, ramp angles and terrain that are hard to assess from diagrams or simulations alone.
The importance of egress planning
ESA describes the departure from the landing platform as a carefully choreographed procedure. The rover has more than one ramp option, and teams need to evaluate the safest route from the lander to the surface. Egress is not just a matter of driving forward: wheel placement, stability, obstacles and the path to the first science targets all affect the plan.
From Earth rehearsals to Mars science
Once a rover reaches the surface, it still has to navigate, communicate with mission controllers and operate its instruments safely. Early movement sets the tone for the mission because a rover immobilised near its lander would have limited access to the terrain it was designed to explore. Good test campaigns build confidence in the sequence and give operators a better sense of the conditions they may face.
Why this engineering story matters
Planetary exploration depends on many quiet operations that rarely become headlines. A successful launch or landing is only the beginning; surface access, power, navigation and instrument deployment all need to work. The ExoMars rover twin shows how agencies use realistic rehearsals to reduce risk. The next meaningful updates will concern mission readiness and the wider timeline, not simply the number of practice runs completed.
Sources and further reading
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