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I thought GPS time didn't have leap seconds?
by swiley 5y ago
I thought GPS time didn't have leap seconds?
- vermilingua 5y agoGPS time needs many leap seconds, as satellites experience a slower passage of time due to relativity.
- detaro 5y agoAnd receivers on earth (or at least the humans reading their output) want UTC, so GPS needs to tell them when to add a leap second.
- imglorp 5y agoIt does not, but UTC does. The GPS broadcast contains GPS time and enough information for receivers to obtain UTC from GPS. > Information in subframe 4 of the NAV message includes the relationship between GPS time and UTC, and it also notes future scheduled leap seconds. In this area, subframe 4 can accommodate 8 bits, 255 leap seconds, which should suffice until about 2330. https://www.e-education.psu.edu/geog862/node/1736 https://www.e-education.psu.edu/geog862/node/1736