moon-sighting/.github/wiki/api/functions/initKernels.md

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[**moon-sighting v1.1.1**](../README.md)
***
[moon-sighting](../README.md) / initKernels
# Function: initKernels()
> **initKernels**(`config?`): `Promise`\<`void`\>
Defined in: [api/index.ts:121](https://github.com/acamarata/moon-sighting/blob/2992dcee216cb24cc74542f6e8d5a6f4f0d16e05/src/api/index.ts#L121)
Initialize the kernel engine from an already-downloaded kernel.
Must be called before getMoonSightingReport() or getSunMoonEvents().
Supports three source modes:
- File path (Node.js): initKernels({ planetary: { type: 'file', path: '/path/to/de442s.bsp' } })
- ArrayBuffer (browser): initKernels({ planetary: { type: 'buffer', data: buf, name: 'de442s.bsp' } })
- Auto (Node.js): initKernels() — downloads and caches automatically
## Parameters
### config?
[`KernelConfig`](../interfaces/KernelConfig.md)
Kernel source configuration. Defaults to auto-download.
## Returns
`Promise`\<`void`\>