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Table 1.

RMS noise levels in the continuum for I, Q, U, and V.

FISS-SP HINODE/SP
Stokes RMSc (10−3) S/Nc RMSc (10−3) S/Nc

I/Ic 4.0 250 1.0 1000
Q/Ic 5.6 179 1.0 1000
U/Ic 4.6 217 1.0 1000
V/Ic 1.7 588 1.0 1000

Notes. RMS noise levels of re-degraded FISS-SP and HINODE/SP data. For convenience the equivalent S/N in the continuum (SNRc = RMSc−1) is indicated for each.

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