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On Nov 28, 2007 1:56 AM, Fred Hebard  wrote:
>
> The sun is often visible at solar noon, even on heavily overcast
> days.  Not as often, it is frequently more visible at sunrise and
> sunset than other periods of daylight, with the exception, mentioned
> above, of noon.

This experience may be a result of navigational observations where one
shouldn't use sun observations below about 3 to 5 degrees above the
horizon.

My experience of sunset observations at the dip, i.e. where the upper
limb of the sun touches the apparent horizon are different. There is
very often a thin cloud stripe of e.g. less than the sun's diameter at
the horizon hiding the 'real' sunset. The opposite situation where the
sky is covered and a thin stripe above the horizon is clear has been
much less observed.

Marcel

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