13 lines
1.3 KiB
Markdown
13 lines
1.3 KiB
Markdown
The **Standard Galactic Time Unit** or SGTU is the time unit used for standard communication of time across the many planets and polities of the [[Galactic Cooperation Treaty Organisation|Larana/Galactic Cooperation Treaty Organisation]].
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It is defined as followed:
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SGTU quantities are oft expressed either in binary (for the computers), or hexadecimal (for the normal folks)
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1 SGTU is the length \\(2^{32}\\) periods of the wavelength emited by the [[Ly-α|https://en.wikipedia.org/wiki/Lyman-alpha]] transition of the Hydrogen atom. This amounts to about 1.74µs
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SGTU Timestamps are expressed as a the number of SGTU elapsed since the founding of the GCTO.
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when written they are typically written in groups of 4 hex digits followed by another delimiter and the number of groups the precison omits, the last group may also contain less than 4 digits in which case the lowest significan digits are assumed to be ommitted. e.g. `123F.12/1` is assumed to be equivalent to `123F.12XX.XXXX` (where X is not specified). the start of the timestamp may also be omitted when redundant, in practice it is rare that more than 2 or 3 groups are ever written, unless the activity requires full precision and/or unambiguity.
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example:
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30 September 2065, 13:12 UTC+2 would be oft renderd as `3D13.65/1` or `18F.3D13.6556.6AD9` for full specificity |