GISS Research Scanning Polarimeter

Specifications

Table 1
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

Table 2
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

Table 3
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

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