Where is this data sourced from?
Is it subject to get refreshed as the earth changes? Or it is fixed?
Thanks!
-Dave
Where is this data sourced from?
Is it subject to get refreshed as the earth changes? Or it is fixed?
Thanks!
-Dave
Hi @dave_gould,
This data comes from the International Astronomical Union (IAU) and is based upon the position of a few hundred extragalactical objects like quasars etc. It is used to define a referance frame for our solar system. Because there is no significant change in position (relative to earth) of those extragalactical objects in the next few thousand years, I think the data will only change, if there is a major improvement of technology, which leads to less measurement uncertainty.
In Cesium it can e.g. be used to convert
to
I hope that was helpful and not confusing.
Best, Lennart