Gordon Uber wrote: > > Can anyone help Don Christensen? Please reply to him directly as well as to > Sundial List. He is not a subscriber. Thanks. > > Gordon Uber > > > > > From: "Don Christensen" > > To: > > Subject: hi > > Date: Wed, 7 Apr 1999 14:01:59 +1000 > > X-Mailer: Microsoft Outlook Express 4.72.3110.5 > > X-Rcpt-To: [EMAIL PROTECTED] > > > > I found your address on a sundial website > > could you help me? > > > > I am looking for instructions on how to design an analemmatic garden sundial > > I have : > > Sundials their theory and construction (book) > > also I have seen the website: > > > > <http://www.union-fin.fr/usr/ymasse/cpaepu.htm>http://www.union-fin.fr/usr > > /ymasse/cpaepu.htm and I find it too complex > > > > perhaps you know about analemmatic sundial design > > > > I am trying to piece from the info I have on design > > the sample I have is in the north hemisphere 35` 41' > > I am designing one in the southern hemisphere 26` 11' > > the sample I have (north hemisphere) has the center dates as: > > dec on bottom and june on top with jan feb mar apr may on right side going > > from bottom to top > > and jul aug sept oct nov on left side on centre going from top to bottom > > (if you have sundial theory and construction...albert e waugh....page 114) > > My question is: is this the same for southern hemisphere or mirror image? > > is dec on top june on bottom? or same as sample > > Can you point me to a simple but complete instructions? > > <mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED] > > > > -------------------------------------------------------------------------- > > ---- > > A LogicWorld Customer > > <http://www.logicworld.com.au>www.logicworld.com.au > > Gordon Uber [EMAIL PROTECTED] > Reynen & Uber Web Design http://www.ubr.com/rey&ubr/ > Webmaster: Clocks and Time http://www.ubr.com/clocks/
Attached is a drawing of an analemmatic sundial for latitude 26.1833 degrees South, reading local suntime. In formulae : A = 1/2 large axis. B = 1/2 short axis = A . sin(lat) coordinates hourpoints x = A . sin(t) y = B . cos(t) Scale of date x = 0 y = A . cos(lat) . tan(delta) Lat is latitude t is hourangle delta is sun's declination. That's all. Greetings from Fer. -- Fer J. de Vries [EMAIL PROTECTED] http://www.iaehv.nl/users/ferdv/ lat. 51:30 N long. 5:30 E Attachment converted: MAC Hard Disk:analem.gif (GIFf/JVWR) (000145E3)
