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The clouds aren't always cooperative when taking shots of the Sun.  The Sun partially peeking through an overcast sky can often be useful when using the correct filter.  What I mean is the Sun often appears as though you're viewing it through fog.

How cloudy of a day has it been when you made a successful shot of the Sun?

Is there and infrared detecting sextant?

Carlos

(12-21-2015, 06:47 PM)CarlosPindle Wrote: [ -> ]The clouds aren't always cooperative when taking shots of the Sun.  The Sun partially peeking through an overcast sky can often be useful when using the correct filter.  What I mean is the Sun often appears as though you're viewing it through fog.

How cloudy of a day has it been when you made a successful shot of the Sun?

Is there and infrared detecting sextant?

Carlos

There sort of is but not for us ordinary people;

Optical Celestial Navigation System

"Can't be jammed"...."does not give off any signals"

My guess is the ultimate navigation system will not be GPS but inertial combined with celestial.

Ed