Spectral range 285 to 2800 nm Sensitivity 7 to 14 μV/W/m2 Response time < 5 s Zero offset A < 7 W/m2 Zero offset B < 2 W/m2 Directional error (up to 80° with 1000 W/m2 beam) < 10 W/m2 Temperature dependence of sensitivity (-10 oC to +40 oC) < 1 % Operational temperature range -40 °C to +80 °C Maximum solar irradiance 4000 W/m2 Field of view 180 °