In message <91772dec8a29c048a9bfbe32c49ceb72e86...@echo.usno.navy.mil>, "Matsak
is, Demetrios" writes:
>I asked an unquestioned expert on celestial navigation about its UT
>requirements. This was his response:
>If you want
>accurate longitude, you can't get around the need to know UT1 at no
>wors
I asked an unquestioned expert on celestial navigation about its UT
requirements. This was his response:
For observed stars that are near the celestial equator or at low
declinations, the error can be up to 0.25 nm per uncorrected second.
This
is a systematic error, i.e., all lines of position f
