Windrose API¶
The Windrose API returns Windrose data from a custom location and time range.
Additional Data Specifications: - All parameters are available in their original source spatial resolution. - A request computes 227+ parameters at the Daily Temporal level. - Meteorological parameters are derived from NASA's GMAO MERRA-2 assimilation model.
Methodology¶
The percent of time the wind falls within each power class is computed for 16 Direction Ranges.
Wind Power Classes¶
There are 8 custom wind power classes used based on National Renewable Energy Laboratory's (NREL) Classes of Wind Power Density.
Wind Power Classes Table
| Class | Start (m/s) | End (m/s) |
|---|---|---|
| Class 1 | 0 | 4.4 |
| Class 2 | 4.4 | 5.1 |
| Class 3 | 5.1 | 5.6 |
| Class 4 | 5.6 | 6.0 |
| Class 5 | 6.0 | 6.4 |
| Class 6 | 6.4 | 7.0 |
| Class 7 | 7.0 | 9.4 |
| Class 8 | 9.4 |
Direction Ranges¶
There are 16 computed direction ranges.
Direction Ranges Table
| Direction | Start (°) | End (°) |
|---|---|---|
| N | 348.75 | 11.25 |
| NNE | 11.25 | 33.75 |
| NE | 33.75 | 56.25 |
| ENE | 56.25 | 78.75 |
| E | 78.75 | 101.25 |
| ESE | 101.25 | 123.75 |
| SE | 123.75 | 146.25 |
| SSE | 146.25 | 168.75 |
| S | 168.75 | 191.25 |
| SSW | 191.25 | 213.75 |
| SW | 213.75 | 236.25 |
| WSW | 236.25 | 258.75 |
| W | 258.75 | 281.25 |
| WNW | 281.25 | 303.75 |
| NW | 303.75 | 326.25 |
| NNW | 326.25 | 348.75 |
Formats¶
| Formats | Available | Notes |
|---|---|---|
| JSON | Yes | |
| CSV | Yes | |
| ASCII | Yes |
Request Structure¶
- The request arguments can be in any order after the question mark.
- A single parameter or a list of parameters can be requested with one of the following list separators: ',' or '%2C'.
To help construct and test your API requests, please use the API Pages for the POWER Windrose API.
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