[**nrel-spa v2.0.2**](../README.md)

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[nrel-spa](../README.md) / SPA\_ZA\_INC

# Variable: SPA\_ZA\_INC

> `const` **SPA\_ZA\_INC**: `1`

Defined in: [types.ts:11](https://github.com/acamarata/nrel-spa/blob/b52802f94b8c28a03228118f51c17ce21d4c14b3/src/types.ts#L11)

Compute zenith, azimuth, and incidence angle for a tilted surface.
Requires slope and azm_rotation in SpaOptions.