[time-nuts] Local Solar Time Clock

Brian Lloyd brian at lloyd.com
Sat Jan 18 22:27:03 EST 2014


On Sat, Jan 18, 2014 at 2:25 PM, P Nielsen <pnielsen at tpg.com.au> wrote:

> I am looking for a physical clock (not software) that will indicate local
> solar time. IOW when the sun is at its highest point, the clock would
> reliably read 12:00 throughout the year.
>

Put a stick vertically in the ground. Once a week place pebbles along the
tip of the shadow of the stick from about 11AM until about 1PM *standard*
time (not daylight savings time). Find which pebble is closest to the stick
and leave it there, removing all other pebbles. Repeat for a year. At that
point in time you will have a collection of pebbles that describes a figure
'8' (an Analemma). Label the each pebble with the date. Now you can find
local solar noon very accurately.

-- 
Brian Lloyd, WB6RQN/J79BPL
706 Flightline Drive
Spring Branch, TX 78070
brian at lloyd.com
+1.916.877.5067


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