Next message: Gordon Talge: "Compliers for Navigation Software"
> > 3) In your learned opinion what was the time of meridian passage on that
day
> > at long 132d 40' E.
> >
>
> 3:15:39 GMT
Earlier I had found a slightly different time. On checking I found that I
had used the data from 2003 instead of the year before, which prompted the
question : what changes the sun's position slightly year to year? One
possible answer is that our convention of adding a day every 4 years doesn't
exactly account for the time it takes the earth to orbit the sun. Are there
others?
Another thing I noticed is that on the day in question, Sat 20 Jul 2002, the
v correction is zero, and that with the sun it never becomes a big figure,
unlike the moon, for example.
I guess that all of this is fairly elementary astronomy - would anyone like
to have a go at shedding some light?
