[**moon-sighting v1.1.1**](../README.md)

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[moon-sighting](../README.md) / SpkSegment

# Interface: SpkSegment

Defined in: [types.ts:459](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L459)

A segment in a JPL SPK (DAF) kernel file

## Properties

### center

> **center**: `number`

Defined in: [types.ts:463](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L463)

NAIF body ID of the center body

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### dataOffset

> **dataOffset**: `number`

Defined in: [types.ts:473](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L473)

Byte offset of the data array in the file

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### dataSize

> **dataSize**: `number`

Defined in: [types.ts:475](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L475)

Number of double-precision values in the data array

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### dataType

> **dataType**: `2` \| `3`

Defined in: [types.ts:467](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L467)

SPK data type (2 = Chebyshev position only, 3 = Chebyshev position + velocity)

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### endET

> **endET**: `number`

Defined in: [types.ts:471](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L471)

Segment end time in ET seconds past J2000

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### frame

> **frame**: `number`

Defined in: [types.ts:465](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L465)

Reference frame code

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### startET

> **startET**: `number`

Defined in: [types.ts:469](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L469)

Segment start time in ET seconds past J2000

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### target

> **target**: `number`

Defined in: [types.ts:461](https://github.com/acamarata/moon-sighting/blob/89fb490051d0263a7d41c954161fb945f1569805/src/types.ts#L461)

NAIF body ID of the target body