ESA Document - Emits - ESA

s
HMM
Assessment Study
Report: CDF-20(A)
February 2004
page 152 of 422
Figure 3-27: Baseline design social zone - drawing
The front node has the same dimensions as the back node and it houses the command part with
the cupola for a good spacecraft overview and the translation path to the MEV (Mars Excursion
Vehicle). The cupola is directed into the same direction as the airlock so during an EVA, the
remaining crew can view fellow crew on the space walk. Additionally there are racks for storage.
The orientation is adjusted according to the functionals (see Figure 3-28 bottom right): there is
an extra command level put in between to connect the cupola with the main command to
distinguish the space “below” from the one above. In the “upper” command area six seats have
to be installed for use during the spacecraft acceleration when taking the course towards Mars.
Below there is the main translation path, when the astronauts go to the MEV or return from the
MAV after the surface stay.
Storage is an issue for long space permanence, as already identified from previous MIR
missions. The overall storage space included in this THM design is 37.6 m 3 (excluding LSS, and
consumables) with the possibility of adding 8 to 10 m 3 for additional storage.
The storage space in the overall configuration is distributed as follows:
NODE 1....................= 5.1m 3
Module part 1+2.......= 23.5 m 3