TopBand: Sun calcs.

[Greg Smith]

I have been using a formula for sunrise and sunset times given in an old
edition of ON4UN's book "80m DX'ing".  This formula is quite simple, and
clearly does not take into account the ellipticity of the Earth's orbit,
and other higher order effects.  It has been giving errors of 10 minutes
plus at this QTH (30S 31E) all through the equinox period.

Does anyone have a more accurate formula?

I know that I should extend my operating times to cover the inaccuracies,
but time doesn't permit at present.

Greg, ZS5K.

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