moon-sighting/.github/wiki/api/variables/WGS84.md

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[**moon-sighting v1.1.1**](../README.md)
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[moon-sighting](../README.md) / WGS84
# Variable: WGS84
> `const` **WGS84**: `object`
Defined in: [types.ts:439](https://github.com/acamarata/moon-sighting/blob/2992dcee216cb24cc74542f6e8d5a6f4f0d16e05/src/types.ts#L439)
WGS84 reference ellipsoid parameters
## Type Declaration
### a
> `readonly` **a**: `6378137` = `6378137.0`
Semi-major axis in meters
### f
> `readonly` **f**: `number`
Flattening
### invF
> `readonly` **invF**: `298.257223563` = `298.257223563`
Inverse flattening
### b
#### Get Signature
> **get** **b**(): `number`
Semi-minor axis in meters
##### Returns
`number`
### e2
#### Get Signature
> **get** **e2**(): `number`
First eccentricity squared
##### Returns
`number`