GISS Research Scanning Polarimeter
Specifications
| Parameter | Performance |
|---|---|
| Polarization Accuracy (%) | < 0.2 |
| Radiometric Accuracy (%) | < 5.0 |
| Dynamic Range | > 104 |
| Signal-to-Noise Ratio | > 2000 (with R=0.3) |
| Spectral Characteristics | See Table 2 below |
| Field of View | > 90° |
| Instantaneous FOV | 14 mraa |
| Photodiode Detector Type: * Visible/NIR * Shortwave IR (temperature) |
Silicon HgCdTe (165K)a |
| SWIR Detector Cooling | LN2 dewar |
| Data Rate | < 20 kbytes/sec |
| Size, W×L×H (cm) | 40×64×34 |
| Mass (kg) | < 20 |
| Power (watts) | < 20 w/o heaters |
| Band ID | λc (nm) | Δλ (nm) | Wavelength Type |
|---|---|---|---|
| V1 | 410 | 27 | Visible |
| V2 | 470 | 20 | Visible |
| V3 | 555 | 20 | Visible |
| V4 | 670 | 20 | Visible |
| V5 | 865 | 20 | Near-IR |
| V6 | 960 | 20 | Near-IR |
| S1 | 1590 | 60 | Shortwave-IR |
| S2 | 1880 | 90 | Shortwave-IR |
| S3 | 2250 | 130 | Shortwave-IR |
| Property Type | Property | Uncertainty | Reference |
|---|---|---|---|
| Aerosol | Aerosol Optical Depth for fine & coarse modes (column) | 0.02/7% | Stamnes et al., 2018 |
| Aerosol Size: effective radius for fine and coarse modes (column) | 0.05 µm/10% | Stamnes et al., 2018 | |
| Aerosol Size: effective variance for fine and coarse modes (column) | 0.3/50% | Stamnes et al., 2018 | |
| Aerosol Single Scatter Albedo (column) | 0.03 | Stamnes et al., 2018 | |
| Aerosol Refractive Index (column) | 0.02 | Stamnes et al., 2018 | |
| Aerosol Number Concentration | 50% | Schlosser et al., 2022 | |
| Aerosol Top Height | < 1 km | Wu et al., 2016 | |
| Surface Wind Speed | 0.5 m s-1 | Stamnes et al., 2018 | |
| Ocean | Chlorophyll-A Concentration | 0.7 mg m-3 | Stamnes et al., 2018 |
| Ocean diffuse attenuation coefficient | 40% | Stamnes et al., 2018 | |
| Ocean hemispherical backscatter coefficient | 10% | Stamnes et al., 2018 | |
| Cloud | Cloud Flag | 10% | |
| Cloud Albedo | 10% | ||
| Cloud Top Phase Index | 10% | van Diedenhoven et al., 2012 | |
| Cloud Top Effective Radius | 1 µm/10% | Alexandrov et al., 2012a/b | |
| Cloud Top Effective Variance | 0.05/50% | Alexandrov et al., 2012a/b | |
| Cloud Mean Effective Radius | 20% | Alexandrov et al., 2012a/b | |
| Cloud Optical Depth | 10% | Nakajima & King, 1990 | |
| Liquid Water Path | 25% | Sinclair et al., 2021 | |
| Columnar Water Vapor (Above Surface or Cloud) | 10% | Nielsen et al., 2023 | |
| Cloud Top Height | 15% | Sinclair et al., 2017 | |
| Cloud Droplet Number Concentration | 25% | Sinclair et al., 2021; Sinclair et al., 2019 |
