Open Access

Table 2

Mission parameters adopted for the space-based nulling interferometer.

Parameter Value Unit
Number of collector spacecraft 4
Pessimistic 1.0 m
Mirror diameter Reference 2.0 m
Optimistic 3.5 m
Pessimistic 6.0–17.0 µm
Wavelength coverage Reference 4.0–18.5 µm
Optimistic 3.0–20.0 µm
Spectral resolution 20
Min. nulling baseline length 10 m
Max. nulling baseline length 100 m
Ratio imaging/nulling baseline 6
Quantum efficiency 0.7
Total throughput 0.05
S/Ntarget 7
Duration of search phase 2.5 yr
Slew time 10 h
Rel. observing overheads 0.2

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