Removal of Proba-2 protective covers
Enabling & Support

Entry 18: Encapsulated, Proba-2 vanishes from view forever

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ESA / Enabling & Support / Space Engineering & Technology / Proba Missions

Monday 19 October – Proba-2 comes one step closer to space, and the launch team see it for the final time, as the miniature satellite is encapsulated by the SMOS adapter system and the full-sized satellite attached to it.

The day’s activities begin with the removal of the remaining protective covers, such as the three soft covers over Proba-2’s star trackers and the star tracker experiment being carried out on behalf of the BepiColombo mission, as well as the hard covers above the satellite’s three solar panels. This is the last mechanical activity to be carried out on the spacecraft by the Verhaert Design & Development team.

Proba-2 Certification of Readiness for Encapsulation
Proba-2 Certification of Readiness for Encapsulation

After a final inspection of Proba-2 to formally check that all protective covers have now been safely removed the satellite is certified as ready for encapsulation.

 

At the same time a customised SMOS lifting device is being prepared to pick up the SMOS satellite and its adapter system. For the Verhaert team this is a breathtaking moment – they are about to lose sight of ‘their’ Proba-2 forever.

SMOS and its adapter mated on Breeze encapsulating Proba-2
SMOS and its adapter mated on Breeze encapsulating Proba-2

The Russian launcher authorities take over the hoisting operation and everyone finds themselves wondering whether the height of the crane will be able to provide sufficient clearance to lift the SMOS ‘stack’ above Proba-2 on the Breeze-KM upper stage.

In the end the authorities manage the operation in a perfect manner, being carefully guided by a set of dedicated alignment rods. While SMOS and its adapter are lowered onto Proba-2 the team concentrate on the steadily shrinking clearance between the two. Centimetre by centimetre the team witness their small satellite disappearing until it is entirely encapsulated within its new habitat.

This marks a very emotional moment for the team: they are letting go of their ‘baby’ after more than five years of work on the project, except for a tiny electrical umbilical which allows them to perform ongoing electrical monitoring of the satellite’s health.

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ESP mounting on the final panel
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Proba-2 in its final launch position, on top of Breeze
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Entry 17: Proba-2 mated onto Breeze upper stage

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Removal of Proba-2 protective covers
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Entry 18: Encapsulated, Proba-2 vanishes from view forever

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Encapsulation
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