ESA Document - Emits - ESA

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Two system options were presented with following mass budgets:
ECLSS power requirements
The results are shown in Table 4-69.
Today’s Technology
Mass consumables (kg) 46
Mass system (kg) 549
Table 4-68: Mass budgets
Characteristic Value
Power requirement day (W) 375
Power requirement night (W) 375
Table 4-69: Power budgets
HMM
Assessment Study
Report: CDF-20(A)
February 2004
page 398 of 422
ECLSS volume requirements
Only a first estimate for the volume of the life support system has been achieved in the course of
the study. The internal volume requirement pertains to the volume occupied by the ECLSS inside
the pressurised vessel, as opposed to the external volume requirement, which pertains to the
volume needs outside the pressurised volume.
4.5.9 Data handling
See 4.3.6.
4.5.10 Communications
4.5.10.1 Requirements and design drivers
Characteristic Value
Internal volume requirements (m3) 1.4
External volume requirements (m3) 0
Table 4-70: Volume requirements
• The vehicle shall support Tracking, Telemetry and Command (TT&C) communications
during all mission phases and any attitude.
• Communications availability should be maximized.
• The telecommand (TC) and telemetry (TM) data rates shall be selectable to improve the data
rate depending on the distance to the receiving unit.
• Data consists of housekeeping, audio, and any additional data.
4.5.10.2 Baseline
4.5.10.2.1 Links