Just a quick note: I added SVG output to the meantime sundial program
at http://a1.homelinux.com/cgi-bin/msundial2.cgi
There is a new link to download the SVG file after computing the dial.
I'm working on the DXF as well, it's a bit harder because it's an
older and internally somewhat less
book Sundials: History,
Theory, and Practice. I found portable self-orienting dials esp.
interesting.
Some time later I came across Yvon Masse's web site where he describes
a couple of mean time analemmatic sundials. I really liked his second
design
(at http://pagesperso-orange.fr/ymasse
On Tue, Apr 15, 2008 at 12:59 PM, [EMAIL PROTECTED]
[EMAIL PROTECTED] wrote:
DXF is the most common format used by professional people so it is known
everywhere :
I save my dial design to a memory stick, I go to a printing service shop and
I get my
printed 1:1 picture ready to be
Jan,
What an amazing page about the mean time analemmatic dial of Yvon Massé you
have made.
I am very glad you made it and that you placed your note to it in this
mailing list.
In 1998 I wrote an article (in Dutch) about this sundial in the bulletin of
De Zonnewijzerkring.
(Bul. 98.2 page 16-20
On Sun, Apr 13, 2008 at 6:32 AM, fer de vries
[EMAIL PROTECTED] wrote:
BTW, with the browser MS Explorer version 7 I didn't get the curve for the
DST time but with Mozilla Firefox it was drawn.
Internet Explorer seems to have problems with including web page
widgets (like the text field
esp.
interesting.
Some time later I came across Yvon Masse's web site where he describes
a couple of mean time analemmatic sundials. I really liked his second
design
(at http://pagesperso-orange.fr/ymasse/gnomon/anmn2.htm )
and decided to construct it. Problem: program to compute this sundial
:
John
Carmichael
To: fer de vries ; [EMAIL PROTECTED]
Cc: Sundial List
Sent: Monday, August 21, 2006 8:58
PM
Subject: Hendrik Hollander Mean Time
Dial
Hi Fer and Hendrik:
I know I speak for everyone at the NASS
Conference that we were all very impressed with the Mean
for everyone at the NASS Conference that we were all very
impressed with the
Mean Time Cone Gnomon Dial that youhelped Hendrik Hollander to develop.
Congratulations to
Hendrik for winning the Sawyer Dialing Prize this year.What a surprise. I
knew of Hendrik for his
previous work
Hi Fer and Hendrik:
I know I speak for everyone at the NASS Conference
that we were all very impressed with the Mean Time Cone Gnomon Dial that
youhelped Hendrik Hollander to develop. Congratulations to Hendrik
for winning the Sawyer Dialing Prize this year.What a surprise. I
knew
John Carmichael wrote to the Sundial
List:
-
Hi Fer and Hendrik:
I know I speak for everyone at the NASS Conference
that we were all very impressed with the Mean Time Cone Gnomon Dial that
youhelped Hendrik Hollander to develop. Congratulations to Hendrik
for winning
And here is a discussion of mean time as well as UTC:
http://gauss.gge.unb.ca/GMT.UT.and.the.RGO.html.
-- Richard Langley
On Sat, 11 Jun 2005, Gordon Uber wrote:
From Explanatory Supplement to the Astronomical Almanac by Seidelmann,
pp. 74-6:
However, the sun's motion in right ascension
is, on
average, zero.
Rudolf
Van: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Namens Noam
KaplanVerzonden: vrijdag 10 juni 2005 20:43Aan:
sundial@rrz.uni-koeln.deOnderwerp: mean time
Does anyone know how mean time is set
up?
To clarify, I know that local mean time has 24
hours every
time was computed from observed sidereal [star]
time. What is today called Greenwich Mean Time (civil time) in the UK is
actually Coordinated Universal Time for the Greenwich time zone. It is kept
by atomic clocks and modified by leap seconds as required by variations in
the Earth's rotation.
I
:
sundial@rrz.uni-koeln.deOnderwerp: RE: mean time
Noam,
actually, in a way, the equation of time curve _is_
symmetric around zero.
If you add the values of the EOT for all the days in a
year, you get zero. You might say the integral of the EOT curve equals
zero.
So the answer
might be:legal noon
Does anyone know how mean time is set
up?
To clarify, I know that local mean time has 24
hours every day set for a mean daily rotation for any particular location. I
understand that timezones are set up by thelocal mean time forthe
center of every 15 degrees of longitude, i.e. 0, 15,
30
In a message dated 6/10/2005 2:53:51 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
Does anyone know how mean time is set up?
To clarify, I know that local mean time has 24 hours every day set for a mean daily rotation for any particular location. I understand that timezones are set up
Hello All,
For some time now I have been working on a
mean-time
dial using the suns azimuth. I have made a quarter scale
model and have posted some images and a description on my website www.sun-dials.net. If you go to WHAT'S
NEW there is a link to AZIMUTH DIAL at the foot of the page
The following are from amazon.com, special order, estimated delivery 4-6
weeks. Most seem to have been published by various astrological presses,
originally in the mid 1960s. Our local public library has several in their
reference section.
Time Changes in Canada and Mexico -- Doris C. Doane,
The best reference for the introduction of mean solar time, and indeed for
things such as railway time, local times, daylight savings time, etc. is a
2-volume work by Doris Chase Doane. I'm quite positive about her name, but
don't remember the title of the work itself; she is the authority used
of relativity concerns time and simultaneity, this could be an
example of a fairly mundane technology motivating some very abstract science.
But from 1892 the railway companies used Greenwich mean time.
So you were able to get the train of let's say 10:00 by leaving your
home at 10:05 or even later
Hello Pietro,
In France Mean Solar Time was introduced in many
steps.
First, as in other countries at the turn of 19th
century, it was decided in 1816 that the mean
time shown by clocks would be the only official
time in use. But, of course, as there was no
practical way of transmission
Caro Piero,
From Portugal
One law of May 6 1878:
(... O Real Observatório Astronómico de Lisboa deverá fazer a
transmissão telegráfica da Hora Média Oficial às estações
semafóricas e a outros pontos do País...)
jorge
N38 47 W 9 19
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