Windrose API
The Windrose API returns Windrose data from a custom location and time range.
- 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 the NASA's GMAO MERRA-2 assimilation model.
Methodology
The percent of time the wind is in 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 direction ranges computed.
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 | 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 can be requested 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.