[LEAPSECS] A leap second proposal to consider -- LSEM

[Michael Deckers]

    On 2010-11-04 21:46, Zefram wrote:


>  ....................................  There is a recent near-renaming

>  that shows the way: the modern form of Sidereal Time is known as Earth

>  Rotation Angle.  This name is accurate in some important ways: it's

>  specific to Earth, and it's not time at all but an angular measure.


    To be precise, Earth Rotation Angle exists _in addition_
    to a modern form of Greenwich mean sidereal time, whose
    definition uses both ERA and TT. See for example p 16 of
    [http://www.usno.navy.mil/USNO/astronomical-applications
    /publications/Circular_179.pdf]. The new name denotes a
    new concept, the old concept has retained its name.

    Michael Deckers.