Data Averaging Method
SolarAnywhere historical and real-time data is generated at the native temporal resolution of 30 minutes, corresponding to the frequency of global satellite image retrieval.
Standard, hourly resolution data is averaged from the 30-minute data using standard top-of-hour, end-of-period integration. Cloud cover at times when satellite images are collected are projected to top-of-hour, end-of-period using techniques to normalize irradiation against the time period. Hourly data will represent the normalized irradiation from the proceeding hour (e.g., 11:00 represents 10:00 to 11:00).
Enhanced, 15-minute resolution data is interpolated from the native 30-minute resolution data.
High, 1-minute resolution data is generated using a cloud motion vector technique that estimates the position of the clouds at each of the 30 minutes between two satellite images. This methodology and its limitations are discussed further in the paper “Spatial and Temporal Characteristics of Solar Radiation Variability.”