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#internationalastronomicalunion — Public Fediverse posts

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  1. Dear geodesists, astronomers, and astrophysicists: Does any of you know of some publication that explicitly reports the expression for the metric in a Geocentric Terrestrial Reference System (GTRS) or in the more specific International Terrestrial Reference System (ITRS)?

    Various publications (eg doi.org/10.1086/378162) and textbooks (eg doi.org/10.1017/CBO97811395074) report and discuss the metrics for the Geocentric Celestial Reference System (GCRS), but not for the GTRS. (Even though it seems to me that the expression should be formally identical, as the off-diagonal timelike components take care of rotation).

    Cheers! (Sorry for spamming borderline hashtags.)

    #iau #geodesy #astronomy #physics #generalrelativity #astrophysics #internationalastronomicalunion