- Utility-scale prospecting
- Site assessment
3TIER produced the first global solar irradiance map and time-series dataset at roughly three times the resolution of previous US solar datasets and at thirty times the resolution of global datasets available from NASA. Based on over a decade of satellite imagery and cutting-edge technology, our uniform methodology is supported by a large scientific and research community and results in a consistent map and dataset, enabling more accurate point-to-point comparisons.
The dataset is based on actual, half-hourly, high-resolution visible satellite imagery observations via the broadband visible wavelength channel at a 2 arc minute resolution. These data have been processed to hourly GHI, DNI, and DIF values. 3TIER processes the satellite images based on a combination of in-house research and algorithms published in peer- reviewed scientific literature. These algorithms contain parameters and coefficients that are based on empirical fits to observational data. The specific satellites and length of time varies slightly by region due to differences in the availability of data from region to region. See the chart below for more details.
|Western Hemisphere||GOES 8 - 13||
(January 1997 - present)
|South Asia & Middle East||Meteosat 5, Meteosat 7||
(January 1999 – last quarter)
|East Asia & Oceania||GMS 5, GOES 9, MTSAT 1-2||
(December 1998 – present)
|Europe & Africa||Meteosat 7, Meteosat 9||
(July 1998 – last quarter)
To develop and validate our model, 3TIER used observations from:
If you are unfamiliar with the technical terminology on this page, please visit our Glossary for more information.