① Use ground measurement to calibrate satellite biasAlthough the satellite data of a certain location can only guarantee that the average irradiance deviation during the
Category: Semi-empirical satellite inversion model
Talking about the semi-empirical satellite inversion model.
In order to ensure the accuracy of the monitoring model, the use of ground-measured data is an important step in the data calculation process. It
Uncertainty (error risk) is determined by both astronomical and geographic factors. The sun’s altitude angle (which affects the quality of the atmosphere) is also an
①Calculation of total irradiancePer Schmetz pointed out that Cl should be proportional to the total clear sky index kt=GHI/GHIclear. A linear relationship is used in
① Non-uniform terrainIn coastal areas and some other arid areas, the ground albedo may change drastically within a relatively small range. Although today’s satellite navigation
Cloud extinction can be calculated directly using satellite information. The calculation process includes determining the cloud index (CI) according to the satellite imager and its
Clear sky irradiance refers to the total irradiance (GHlclear) and direct irradiance (DNlclear) of the solar radiation incident on the ground surface at a location
Meteorological satellites include polar orbiting satellites and geostationary satellites. Although polar-orbiting satellites are closer to the surface of the earth (about 850km vs. about 36,000km)