On Tue, 24 Jun 1997, Tony Moss wrote:
As a dial maker and reluctant 'number cruncher' I use computer spreadsheets
for all my calculations but have had to rely on my old printed six-figure
tables for one remaining job - the log tan values in the sun's azimuth
calculation.
e.g. My printed
On Fri, 7 Nov 1997, k.schwarzinger wrote:
Dear all,
is there in the INTERNET a website, which gives informations
about the curent value from the declination of the magentic
North Pole ?
Are there still informations about the situation of the magnetic
North Pole ( INTERNET or literature
Reference System 1980 has
a = 6 378 137 metres
b = 6 356 752 metres (to the nearest metre).
In computing the distance to the horizon, if you want the visibile horizon (as
opposed to the geometric one), you should take refraction into account.
-- Richard Langley
Professor of Geodesy and Precision
/
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Wed, 11 Nov 1998, Greg Milsom wrote:
Is anyone aware of a shareware or freeware program available on the web
that will compute the magnetic variation for various Longitude and
Latitude coordinates? I am trying to orient my homemade
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
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
There's a difference between astronomical latitude and longitude and geodetic
latitude and longitude. Prof. Charles Merry at the University of Cape Town
should be able to help you out with the specifics of geodetic datums used in
South Africa: [EMAIL PROTECTED]
-- Richard Langley
Professor
moons to be
seen in Europe. Tony, how old are you? Could this have been your event?
-- Richard Langley
Professor of Geodesy and Precision Navigation
P.S. Source of info: The Stars Belong to Everyone by Prof. Helen Sawyer Hogg
(a famous and much-loved Canadian astronomer (she passed away in 1993
and make it available to list members?
-- Richard Langley
Professor of Geodesy and Precision Navigation
===
Richard B. Langley
the leap second jumps.
-- Richard Langley
Professor of Geodesy and Precision Navigation
===
Richard B. LangleyE-mail
And for a discussion of the transit of Venus, teaching astronomy, and love,
read Stephen Leacock's short story The Transit of Venus. :-)
On Mon, 15 Mar 1999, Dave Bell wrote:
On Tue, 16 Mar 1999, John Pickard wrote:
When I was a kid at school more years ago than I care to remember, I
was
No difference. See http://www.op.dlr.de/~igex98op/monitor/monitor.htm
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Fri, 26 Mar 1999, Tom Mchugh wrote:
Dear All,
Last year there was some discussion on the List concerning
possible changes of accuracy of GPS at the time
Is this really from Fernando? Doesn't sound like it. Note that the posting
did not origniate from his usual e-mail address but from Hot Mail. Do we have
a Fernando imposter?
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Sat, 17 Apr 1999, Fernando Cabral wrote:
Hello
I'm not a member but here's the contact info:
Dr. Andre Bouchard, Secretaire General
La Commission des Cadrans solaires du Quebec
42, av. de la Brunante
Outremont (Montreal)
Quebec H3T 1R4
Canada
tel: 514-341-3997
fax: 514-341-3997
e-mail: [EMAIL PROTECTED]
On Tue, 11 May 1999 [EMAIL
Ecclesiastes. Chapter 3. Verse 11. The online versions I checked did not
capilalise his.
On Mon, 17 May 1999, Tony Moss wrote:
Fellow Shadow Watchers,
This is 100% on topic and somewhat urgent for me.
The large bronze dial plate which I am about to engrave must bear
And, as a geodesist, it would be remiss of me not to point out that the
heliograph was preceded by the heliotrope, a device to make survey stations
more visible from long distances, invented by the father of modern geodesy,
Carl Friedrich Gauss, in the early 1800s.
-- Richard Langley
Professor
On Wed, 23 Jun 1999, Frank Evans wrote:
Maybe somebody can remember more of Kipling's poem referred to earlier
than I can. Or even the title. It was about India, I'm fairly sure.
Part went something like:
Are you there, are you there, are you there?
Three sides of a ninety mile square,
With a
Are you thinking of Spherical and Practical Astronomy as Applied to Geodesy by
Ivan Mueller (Ungar, ISBN 0-8044-4667-9)
or
Astronomical Algorithms by Jean Meeus (Willmann-Bell, ISBN 0-943396-35-2)?
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Wed, 4 Aug 1999, Anton
I wrote an in depth article on the roll-over for GPS World. It's on their Web
site: http://www.gpsworld.com
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Mon, 16 Aug 1999, Keith E. Brandt, M.D. wrote:
Frank,
Check out http://www.space.com/news/gps_rollover.html
Not that it will affect sundials in the short term, but discussions are
underway to abolish or modify the procedure of adding leap seconds to UTC
every year or two. See the November issue of GPS World for details.
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Wed, 3
than a
money order.
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Sat, 4 Dec 1999, Tony Moss wrote:
Fellow Shadow Watchers,
Just at the moment a fair amount of my brassware
seems to be heading for the USA and this always presents the problem
The Royal Institution Christmas Lectures this year are on time. They are
being broadcast on BBC television and the BBC have put up summaries of the
lectures along with a lot of background information on their Web site. Even
though primarily intended for a younger audience, the pages are worth a
See
http://news2.thls.bbc.co.uk/hi/english/sci/tech/newsid_58/580334.stm
for a news item on Greenwich Electronic Time to be launch on New Year's Day.
On Wed, 12 Apr 2000, Robert Terwilliger wrote:
Hi All,
Comment: I think the problem with rotating or skewing text in graphics
files could be solved if the text character entities could be converted
into the vector lines and curves which make them up. I don't think this
is easy to do with True
The July/August 2000 issue of Weatherwise, a popular-level magazine about the
weather available on North American magazine racks, features an article on
sundials (Time is But a Shadow). Includes photos of 12 sundials and
mentions the NASS and BSS Web sites.
Yes, it is confirmed. See
http://www.cnn.com/2000/TECH/computing/05/02/civil.gps.idg/index.html
and
http://www.spacecom.af.mil/usspacecom/gps_support/.
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Tue, 9 May 2000, Fernando Cabral wrote:
Dear fellows in sundialling
info on the Web if you need further info.
-- Richard Langley
On Sat, 13 May 2000, Allan Pratt wrote:
As most of you know, the US government has relaxed the restrictions on
the GPS system. Supposedly the accuracy has improved from 10 meters to 1
meter. My question is, do the actual GPS units in use
of the spectrum (for example,
looking at it using special 'eclipse' glasses: Remember, do not ever
look directly at the Sun!).
-- Richard Langley
On Wed, 3 Jan 2001, Gordon Uber wrote:
John,
I think that the SOHO images are updated at least once a day. The latest
sunspot image was taken at 10:16 UT today
The time zone boundaries in North America are quite irregular. Have a look at
http://www.nrc.ca/inms/time/tze.html for the current Canadian time zone
maps.
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Tue, 27 Mar 2001, harriet wrote:
Dear All,
Can anyone clarify
See also:
http://www.cnb.cz/en/_platidla/ceske_mince/20_koruny2000.htm
-- Richard Langley
On Wed, 18 Apr 2001, Martha A. Villegas wrote:
On the James E. Morrison site about astrolabes, there is a very nice picture
of this coin
http://www.astrolabes.org/links.htm
Martha A. Villegas
There is a largish picture of the mosaic on the Web:
here: http://www-gap.dcs.st-and.ac.uk/~history/PictDisplay/Plato.html.
-- Richard Langley
On Thu, 11 Jul 2002, Gianni Ferrari wrote:
Some notes
The mosaic, called also Plato's Academy, is , at present, in the
National Archaeological
: 12643.f.14.
-- Richard Langley
Professor of Geodesy and Precision Navigation
===
Richard B. LangleyE-mail
-- pushing
the limits of even GPS technology), the grid square designation to the
nearest metre is TQ 3885777345. Grid squares are really only helpful for low
precision references. See http://www.gps.gov.uk/natgrid/introduction.asp for
further explanation.
-- Richard Langley
Professor of Geodesy
in the November 1999 issue. A PDF file of
the article may be found here:
http://iraf.noao.edu/~seaman/leap/GPS-Nov99_Innov.pdf.
-- Richard Langley
Professor of Geodesy and Precision Navigation
and Contributing Editor, GPS World Magazine
On Mon, 1 Dec 2003, Woody Sullivan wrote:
This article
The article is available on line at
http://www.nytimes.com/2003/03/16/travel/16bpsun.html.
Concerning the Salvador Dali dial, as I recall, it's not mounted correctly.
It's not on the correct facing wall.
-- Richard Langley
On Sun, 16 Mar 2003 [EMAIL PROTECTED] wrote:
3-16-03
Please note
The Radio 4 longwave transmitter is on 198 kHz. Not 198 m mediumwave.
Reception is more or less restricted to Europe.
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Fri, 28 Nov 2003 [EMAIL PROTECTED] wrote:
In a message dated 2003/11/27 02:50:54 PM, [EMAIL PROTECTED
://www.elainefineart.com/dali/self_portrait_sundial.htm
Are there any other Dalí sundials -- real or painted?
-- Richard Langley
P.S. Fredericton is home to Dalí's huge Satiago El Grande. It is on
permanent display in the city's Beaverbrook Art Gallery
http://www.beaverbrookartgallery.org/, one of 4 Dalí paitings
-
From: Richard Langley [EMAIL PROTECTED]
To: sundial@rrz.uni-koeln.de
Sent: Monday, February 02, 2004 3:08 PM
Subject: Salvador Dalí and Sundials
While on a recent holiday in southern Florida, my wife and I visited the
Salvador Dalí Museum in St. Petersburg http://www.salvadordalimuseum.org
details.
Navigate is a handy application for computing geodesics on various
ellipsoids for PDAs using the Palm OS:
http://fermi.jhuapl.edu/navigate/index.html
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Tue, 3 Feb 2004, Thaddeus Weakley wrote:
Hello All -
Tony's posting
as that at more southerly locations. Any further north (or, more precisely,
towards the north magnetic pole) and a compass starts to become erratic.
More info here http://www.ngdc.noaa.gov/seg/potfld/faqgeom.shtml.
Have fun.
-- Richard Langley
Professor of Geodesy and Precision Navigation
On Sat
Tony:
Isn't the clockmaker's IV? Apparently introduced since it balances
VIII although that's not a theory that is without problems since other
numbers on the clock face are not balanced. While not necessarily
authoratative, see
http://www.wilkiecollins.demon.co.uk/roman/clockface.htm.
--
According to
http://www2.inetdirect.net/~charta/Roman_numerals.html#footnote4, the Romans
themselves rarely used the subtraction principle and so would have primarily
used rather than IV.
-- Richard
On Sat, 27 Mar 2004, tony moss wrote:
Richard Langley wrote:
Isn't the clockmaker's
. Some day I
must put some better pictures of the sundial and plaque up on the Web.
-- Richard Langley
On Thu, 8 Jul 2004, John Carmichael wrote:
Hello All,
Some of you wrote me and seemed very confused with my inquiry about a way to
get a EOT table that is longitude corrected. You ot understand
Book of
Sun-Dials.
There HAS to be a connection with the Gattys. Perhaps you know the
story? I think that the origins of the sundial are really worth following
up.
Regards,
Mike Cowham.
- Original Message -
From: Richard Langley
To: John Carmichael
Cc: Sundial List
Sent
with an error
report.
-- Richard Langley
On Fri, 11 Feb 2005, Lufkin, Brad wrote:
Many moons ago, I wrote a Mac Sundial program, but I lost my machine and so
the program is no longer directly available from me. However, it used to live
on a website (http://dialist.webjump.com) maintained by a contributor
Works on an iMac under OS 9.1 but I had to discard the downloaded Preferences
file before it would work correctly. This is a later version of the program
than the one I reported on earlier which apparently doesn't work under more
recent versions of the classic Mac operating system.
-- Richard
On Mon, 11 Apr 2005, tony moss wrote:
Frank King Wrote,
Can some U.S. reader who knows all about cold
winters kindly let this temperate Brit know what is
likely to be found underneath this dial? Is there
really 1200mm of hard-core and elaborate drainage?
The pedestal of the Longyearbyen dial
I have received some duplicates, too.
-- Richard Langley
On Thu, 14 Apr 2005, Mac Oglesby wrote:
For the past several days each message from the sundial list, and
only from the sundial list, has been closely followed by a duplicate
message, but one which concludes with the announcement
and publicly available Earth Gravity Model 1996. This
is a global model. There are regional models of different parts of the Earth
which are even better.
-- Richard Langley
On Tue, 24 May 2005, Frank King wrote:
Dear Wee-Meng
You raise some very interesting points...
When I read about
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
and enlarge them.
Has anyone found other gnomonic links?
- Daniel
RGO Information Leaflet No. 23: 'Sundials'
http://www.ast.cam.ac.uk/RGO/leaflets/sundials/sundial.html
Sundial of Hong Kong University of Science and Technology:
http://sunsite.ust.hk/hkust/campus/sundial.html
-- Richard
On Thu, 15 Feb 1996, Richard Langley wrote:
RGO Information Leaflet No. 23: 'Sundials'
http://www.ast.cam.ac.uk/RGO/leaflets/sundials/sundial.html
Sorry, should be
http://www.ast.cam.ac.uk/RGO/leaflets/sundials/sundials.html
a particular graphic you are interested in, let me know.
Fred Sawyer
For the future, perhaps a different format could be used such as Adobe
PDF. These documents look good both on screen and when printed.
-- Richard Langley
Professor
On Fri, 3 May 1996, Jack Aubert wrote:
I would like to forward the following enquiry to all those dialiasts
who know more than I do about celestial mechanics. It seems to me
that the answer has something to do with the fact that the sun appears
as a disk rather than a point in space, but I
On Mon, 13 May 1996, John D. Hall wrote:
Can anybody provide a temporary ftp site for a Mac version of Brad
Lufkins Sundial program. After repeated attempts I have been unable
to download it from him (files I receive range in size from (950K
down to 226K) I would love to get a copy of this
On Sat, 8 Jun 1996, Fer J. de Vries wrote:
To Mozart::Edelmann.
I got an E-mail from
MOZART::EDELMANN[EMAIL PROTECTED]
but returning an answer to this adress I got the message back.
What is wrong with this adress?
Fer de Vries.
[EMAIL PROTECTED]
In the subscriber list, this
mail file. Let
me know if it would be of use.
-- Richard Langley
===
Richard B. Langley Internet: [EMAIL PROTECTED
There is an interesting article on the stations of the cross -- and variations
and dates in churches -- in the catholic encyclopedia:
http://www.newadvent.org/cathen/15569a.htm
-- Richard Langley
On Thu, 11 May 2006, Frans W. Maes wrote:
Hi Frank,
In Roman Catholic churches I noted always 14
find it on
the Royal Canadian Mint Web site.
-- Richard Langley
===
Richard B. LangleyE-mail: [EMAIL PROTECTED]
Geodetic Research Laboratory Web: http://www.unb.ca/GGE/
Dept
visiting sundials on our vacations
to have sundial POI files for other regions. What is needed are accurate
WGS84 coordinates for the sundials or exact street addresses which can be
mapped to the coordinates.
-- Richard Langley
And I think Frank might be having us on with the owla
interpretation. More likely the owls around Hughes Hall descend from
the college's crest/shield:
http://en.m.wikipedia.org/wiki/Hughes_Hall%2C_Cambridge?wasRedirected=true
.
-- Richard Langley
Sent from my iPod Touch
On 2010-11-19
The Catholic Encyclopedia has an interesting article on church
orientation, including a mention of St. Peter's: http://en.wikisource.org/wiki/Catholic_Encyclopedia_%281913%29/Orientation_of_Churches
.
-- Richard
On 19-Feb-11, at 11:47 AM, Frank King wrote:
Dear Jackie,
That is an
Included in the bad sundials list should be sundials, which were
properly constructed for the location but improperly installed or
improperly re-installed after cleaning or refurbishment. I happened to
notice one I think falls in the latter category on the way to the
terminal at Heathrow
Hi Steve:
It's one of the reasons why I prefer to use gnuplot, rather than
Excel, for some plotting tasks. Gnuplot is dead easy to use and comes
in different flavours for different operating systems:
http://www.gnuplot.info/
-- Richard
On 21-Jun-11, at 8:29 PM, Steve Lelievre wrote:
Hi,
e) whether on the observatory
grounds there is a continuous strip or something similar.
-- Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geodetic Research Laboratory
Google and ye shall find:
https://en.wikipedia.org/wiki/Amira_Willighagen
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geodetic Research Laboratory Web:
There is the huge Quitsato Sundial near Quito. If you Google "Quitsato Sundial"
and select Images, you'll find some with people in them.
-- Richard Langley
-
| Richard B. Langley
Meteorologists do have a different view (for computational purposes):
http://www.rin.org.uk/newsitem/4457/Farewell-Winter
-- Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca
Thanks, Tony. As one of the judges said at the end of the video, "f***ing
amazing." Hadn't heard of her before. More here:
https://en.wikipedia.org/wiki/Amira_Willighagen?
Thanks again.
-- Richard Langley
-
-recalibrate-time-to-survive-in-the-pamir-mountains
-- Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geodetic Research Laboratory Web: http://gge.unb.ca
mber98.pdf
-- Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geodetic Research Laboratory Web:
http://gge.unb.ca<http://gge.unb.ca/> |
| Dept. of Geode
ate the world’s time and why the leap second
is ‘dangerous’."
http://www.bbc.co.uk/programmes/p04q778b
-- Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geo
Yes. The navigation message transmitted by GPS satellites includes the current
leap second offset so a receiver can compute and display correct UTC.
-- Richard Langley
Sent from my iPhone
On Jan 29, 2017, at 6:05 PM,
rodwall1...@gmail.com<mailto:rodwall1...@gmail.com>
<rodwall1...@
m/its-leap-second-day-time-to-get-in-sync/
-- Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geodetic Research Laboratory Web:
http://gge.unb.ca<http
Hi Hal:
Where are you located?
-- Richard Langley
University of New Brunswick
Sent from my iPhone
On Sep 17, 2016, at 9:27 AM, Hals Email
<hal2d...@gmail.com<mailto:hal2d...@gmail.com>> wrote:
I need some suggestions from the sundial list. I would like to donate my
sundial
, we found that DST could decrease collisions with
koalas by 8% on weekdays and 11% at weekends, simply by shifting the timing of
traffic relative to darkness. Wildlife conservation and road safety should
become part of the debate on DST.
-- Richard Langley
P.S. Sorry to prolong the debate, whi
ourse from the Math and Stats Department:
http://www2.unb.ca/gge/Study/Undergraduate/CourseSequence.pdf
http://www.unb.ca/academics/calendar/undergraduate/current/frederictoncourses/mathematics/math-3543.html
-- Richa
coins needed? ;-)
-- Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geodetic Research Laboratory Web:
http://gge.unb.ca<http://gge.unb.ca/> |
; they all (or mostly all) used
Big Ben. And the listen again feature for Radio 4 just before midnight is a
repeat of an earlier program when they announce the time as 5 p.m.!
-- Richard Langley
-
| Richard
/Resources/LeapSecond2015.pdf
-- Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geodetic Research Laboratory Web:
http://gge.unb.ca<http://gge.unb
I had previously overlooked the episode "Clock" in the series "50 Things That
Made the Modern Economy." Luckily, it can be listened to again or downloaded as
a podcast:
http://www.bbc.co.uk/programmes/p04skkw4
Nice but be aware:
https://www.theguardian.com/technology/2016/dec/08/kickstarter-pebble-shut-down
-- Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geodetic Research
Whoops! Fake news! Einstein did get a Nobel prize but not for relativity. He
got it in 1921 for explaining the photoelectric effect.
-- Richard Langley
Sent from my iPhone
On Nov 4, 2017, at 4:08 PM, Brooke Clarke
<bro...@pacific.net<mailto:bro...@pacific.net>> wrote:
Hi Rod:
Usi
For free? Not when I followed the links.
-- (Prof.) Richard Langley
-
| Richard B. LangleyE-mail: l...@unb.ca |
| Geodetic Research Laboratory Web: http://gge.unb.ca
Buckingham Palace, I presume. Mere mortals ordinarily can't get in there. ;-)
-- Richard Langley
Sent from my iPhone
On Apr 10, 2018, at 9:25 PM, Roger Bailey
<rtbai...@telus.net<mailto:rtbai...@telus.net>> wrote:
Which palace? I found two sundials at Windsor Castle, both in
Hi Steve:
My iPhone compass app is indicating N correctly to within 1° right now with the
phone sitting on the dining room table in a wood-frame house. Calibration not
performed recently. Fortuitous? There must be some specs somewhere on the Web.
-- Richard
/ |
-
From: sundial on behalf of Richard Langley
Sent: September 11, 2018 4:49 PM
To: Steve Lelievre; Sundial List
Subject: Re: How good is a cell phone compass
Hi Steve:
My iPhone compass app is indicating N correctly to within 1° right now with the
phone sitting on the dining
I run into that problem all the time concerning GPS and GNSS. Even editors of
technical magazines are often not fully scientifically literate. In the
editorial of a GNSS magazine this month, the editor stated that an asterism was
a group of constellations! :-(
-- Richard Langley
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