In German language we have: WOZ Wahre Ortszeit (= LAT, 12:00 = sun is exactly south at the location)
MOZ Mittlere Ortszeit - within a year the medium length of a day`s time WOZ = MOZ + EoT MEZ Mitteleuropäische Zeit = MOZ at longitude 15° East MESZ Mitteleuropäische Sommerzeit = MEZ + 1 h Regarding the ongoing diskussion whitch time shall we take in the future if we leave the yearly double change standard/summer/daylight saving time: I would prefer a revolution and take only two definitions worldwide: 1) UTC (universal time for global synchronisation) 2) LAT (the most natural local time caused by the sun's position only). The calculation in between should not be a problem by GPS driven watches/smartphones/IoT-devices. Even mechanic watches would be able to do the job for EoT - EoL can be set manually if necessary while travelling. Kurt Kurt Niel <[email protected]> schrieb am Mi., 13. März 2019, 22:51: > Dear sundialists, > > within my sundial-/webcamproject https://kepleruhr.at/en/live-view I > already declared the following relationship: > > UTC + > EoT (equation of time) + > EoL (equation of longitude) = > LAT (local apparent time) = > WOZ (Wahre Ortszeit) [German] > > Kurt > > Dan-George Uza <[email protected]> schrieb am Mi., 13. März 2019, > 22:21: > >> Perhaps "equation of longitude"? >> >> Dan Uza >> >> On Wed, Mar 13, 2019, 20:50 Julian Lush <[email protected]> >> wrote: >> >>> How about longitude adjustment? >>> >>> Julian Lush >>> 72 Bromfelde Road, London SW4 6PR >>> 020 7622 9497 07815 637706 >>> ------------------------------ >>> *From:* sundial <[email protected]> on behalf of Frank King < >>> [email protected]> >>> *Sent:* 13 March 2019 12:29 >>> *To:* Dan-George Uza >>> *Cc:* Sundial List >>> *Subject:* Re: dischrony >>> >>> Dear All, >>> >>> I have a mild distaste for "correction" since >>> it implies something is wrong. In particular >>> 'local mean time' and 'local mean time-zone time' >>> are both correct, but different, times. One is >>> offset from the other but this offset is in no >>> sense a correction! >>> >>> To me "offset" is neutral. >>> >>> There are, of course, many many different >>> times in current use. Here are just a few: >>> >>> TAI, UTC, UT1, UT2, GMT, GST, GPS time >>> >>> None of these is wrong but each is offset >>> from all the others. >>> >>> Sometimes the offset is constant such as >>> the difference between TAI and GPS time >>> >>> Sometimes the offset changes infrequently, >>> such as the difference between TAI and UTC >>> (which changes only when there is a leap >>> second). >>> >>> Sometimes the offset changes continuously, >>> such as the difference between GST (sidereal >>> time) and GMT. >>> >>> This suggests that the word 'constant' is >>> not generally appropriate and is why I am >>> not keen on the Italian "costante locale". >>> >>> This is actually a false assertion when >>> referring to local mean time versus local >>> time-zone time because in most places the >>> reference time zone is shifted 15 degrees >>> backwards and forwards at the whim of >>> legislators! The offset is not constant! >>> >>> Dan-George asks: >>> >>> how would you translate the Italian >>> "foro gnomonico" >>> >>> In English, this translates literally as >>> "gnomonic hole" but this would be a bad >>> translation! It generally refers to the >>> hole in the roof (or possibly a side wall) >>> of a cathedral or large church that lets >>> in the sun so as to cast an image of the >>> sun on the floor. >>> >>> The best English equivalent is "aperture >>> nodus" but that isn't quite the same thing. >>> An aperture nodus provides a spot of light >>> on the dial plate, not an image of the sun. >>> >>> The French "oeilleton" is more challenging! >>> In English, this translates literally as >>> "eye-cap" which I think of as something >>> for medical use, for washing your eyes. >>> >>> I rather suspect that the French also use >>> this to mean aperture nodus but I should >>> like confirmation. >>> >>> Frank >>> >>> Frank King >>> Cambridge, U.K. >>> >>> --------------------------------------------------- >>> https://lists.uni-koeln.de/mailman/listinfo/sundial >>> >>> --------------------------------------------------- >> https://lists.uni-koeln.de/mailman/listinfo/sundial >> >>
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