I recently was asked the following question:
Are you aware of any software or organization able to plot analemmatic
sundial positions?
Does anyone have an answer?
Happy Holidays to all!
Claude Hartman
[EMAIL PROTECTED]
Dear Pete,
Thanks for your e-mail concerning the formula used in your
analemmic-equatorial sundial.
Indeed, for the real dial the error is negligible.
Merry Christmas and a Happy New Year.
Fer.
Claude,
See the note in the letters section of Compendium 5(1)
Fred
Dear friends:
I know there is a sundial work by J. FORT entitled Restauration de Cadrans
solaires peintes, in French language, but I do not know if it is a book or an
article.
Can you to give me more data? I am interested in this work.
Thank you very much. Best regards.
Diego de SanMartin
I recently was asked the following question:
Are you aware of any software or organization able to plot analemmatic
sundial positions?
Does anyone have an answer?
Happy Holidays to all!
Claude Hartman
[EMAIL PROTECTED]
Hello Claude,
In NASS's Compendium volume 2 number 3 (September 1995)
GPS has been under Selective Availability since it was declared operational.
This limits horizontal positional accuracy to 100 metres at the 95% confidence
level. See http://www.cnde.iastate.edu/staff/swormley/gps/check_sa.html for
more info.
-- Richard Langley
Professor of Geodesy and
Remember, SA is a quasi-random variation. Sometimes, the instantaneous SA
error is 0. Did you monitor the position for at least 15 minutes? To the
best of my knowledge, the U.S. military no longer has the need to turn off SA
durirng operations.
-- Richard Langley
Professor of Geodesy and
