Multispectral Polarization State Analyzer of Scanning Polarimeter ScanPol

Table 4

The signal/noise ratio estimate.

Spectral channel (nm)	370	410	555	865	1378	1620
Geometrical factor ·steradian	4.70^−99	12.0^−99
Energy brightness (scene averaged) photons/sec m^2·steradian,·10^16	93.00	70.95	111.27	261.92	35.46	117.61
Photodetector quantum efficiency,	0.20	0.31	0.72	0.24	0.68	0.51
The number of electrons from the photodetector, n	33.9 × 10^4	45.9 × 10^4	168 × 10^4	335 × 10^4	128 × 10^4	319 × 10^4
Fractional noise, e	582	677	1296	1830	1131	1786
Signal/noise ratio	546	646	1280	1785	1058	1741

The last row of the table shows the signal-to-noise ratio based on the expected noise of the photodetectors, amplifiers, and ADCs.