In message <[email protected]>, "Richard B. Langley" writ
es:

>iii) The introduction of the satellite Doppler technique (Transit) to help in
>establishing the BIH meridian; the Doppler datum turned out to have a different
>longitude origin.
>iv) Misalignment of the series of WGS reference meridians with that of BIH.

So which datum is used for the zero meridian, which defines the UT* family
of timescales ?

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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Never attribute to malice what can adequately be explained by incompetence.
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