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by SAI_Peregrinus
944 days ago
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Exactly. UNIX time, GPS time, and TAI are a fixed offset from one another. They're a variable offset from UT1 (based on earth's angle with respect to some distant quasars). If you care about things like where the stars are, use UT1. If you want monotonic time, use TAI or one of the time standards that's a fixed offset from it. If you want to plan a spacecraft trajectory through the solar system, use barycentric coordinate time (TCB). If you want something that approximates UT1 but otherwise works like TAI, use UTC. If you're dealing with human activity, UTC will usually be the easiest choice. If you're just dealing with computers, TAI (or one of its fixed-offset variants like UNIX time) will usually be the easiest choice. |
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Wrong again. UNIX time definitely is not fixed offset from GPS time. Here is handy dandy conversion tool between the two: https://bag-of-tools.com/gps-time-converter/
1700000000 UNIX = 1384035218 GPS
700000000 UNIX = 384035207 GPS