Research Article
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 m2·steradian,·1016 | 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 × 104 | 45.9 × 104 | 168 × 104 | 335 × 104 | 128 × 104 | 319 × 104 | 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.
|