Product Features
Product includes a Map Controller and tools providing annual and monthly mean values for:
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Global Horizontal Irradiance
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Direct Normal Irradiance
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Diffuse Horizontal Irradiance
Optional Features
Two purchasing options:
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Monthly Subscription
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1 Day Pass
Product Highlights
Access to 3TIER Dashboard tools
Tailor the way you see information to the specific needs and demands of your work all within a seamless, drag and drop interface featuring page layout options, maximize and scale tools, and multiple page views.
Click and Compare
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Multiple Locations: The Solar Prospecting Tools allow you to link and unlink data displays for a single site while you evaluate it against other locations.
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Technology Options: Determine the ideal type of technology (solar thermal or photovoltaic) to install by comparing data for different types of irradiance.
Extensive Geographic Availability
Select the area you want to explore from 3TIER's vast solar dataset. With widespread coverage from a consistent dataset, you have access to the most accurate, seamless information available. If you are looking for an area to develop, we can provide the tools to get you started.
Regions with GHI Availability
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North America
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India
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China
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Australia
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Japan
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South Korea
Regions with DNI and DIF Availability
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India
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China
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Australia
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Japan
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South Korea
Delivery Method
Prospecting data tools are made available via a client-specific dashboard interface.
Methodology
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.
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Regions
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Satellites
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Temporal Coverage
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Western Hemisphere
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GOES 8 - 13
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13 years (January 1997 - May 2010)
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South Asia and Middle East
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Meteosat 5, Meteosat 7
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11 years (January 1999 – February 2010)
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East Asia and Oceania
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GMS 5, GOES 9, AMTSAT
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11 years (December 1999 – March 2010)
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Europe and Africa
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Meteosat 7, Meteosat 9
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11 years (July 1998 – March 2010)
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To develop and validate our model, 3TIER used observations from:
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SurfRad
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Baseline Surface Radiation Networks
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National Solar Radiation Database
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Bureau of Meteorology (Australia)
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National Institute of Water and Atmospheric Research (New Zealand)
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Indian Meteorology Department
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NREL Annex II
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Linke Turbidity Database from Ecole des Mines de Paris
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National Snow and Ice Data Center (high-resolution snow dataset)
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MODIS Aerosol Optical Depth and Water Vapor Datasets
Find our validation papers here.
If you are unfamiliar with the technical terminology on this page, please visit our Glossary for more information.