Sun ephemeris and sundials simulation for design and education
Sol Et Umbra is a program that shows sun ephemeris and is devoted to sundial designers.
The program shows the main sun parameters for the actual (or whichever desired) time and date:
- latitude and longitude
- right ascension and declination
- local azimuth and height
- equation of time
- local or time zone sun time
- local or time zone mean time
- time of (geometric center) rise, (geometric center) set and transit (local noon)
- total number of hours of light
Wenn eine Netzwerkverbindung verfügbar ist, wird mittels des Netzwerkzeitprotokolls der Zeitfehler zwischen der Telefonuhr und einer Atomuhr gefunden und verwendet, um die angezeigte Zeit zu korrigieren.
Die Position des Geräts wird über GPS oder, wenn dies nicht verfügbar ist, über Informationen aus dem Netzwerk oder schließlich über manuelle Einstellung gefunden.
Moreover Sol Et Umbra shows the time using the following time systems:
- italic time
- babilonic time
- temporal time
It also shows the time of Muslims prayers (that are strictly related to the position of the sun):
- Fajr
- Zuhr
- Asr1
- Asr2
- Maghrib
- Isha
and the Qibla (direction of the Ka'ba).
Sol Et Umbra verwendet die im Gerät erhältlichen Orientierungssensoren, um die Zeitlinien (französisch, kursiv, "Da Campanile", Babilonic oder Temporal) einer auf der Ebene des Display entworfenen Sonnenuhr zu berechnen und zu zeigen.
The graph is updated after any movement of the device.
Schließlich kann das Programm die Beleuchtungsbedingungen des Zifferblatts als auf der Geräteebene mit einem Azimut-/Höhengraphen, das für jeden Tag im Jahr und für jede Stunde des Tages, an dem das Zifferblatt beleuchtet wird, angezeigt wird, angezeigt. Moreover the sun path in the sky is displayed over the camera acquisition.
Notiz
The accuracy in the measurement of the orientation of the device depends on the accuracy of internal sensors. Moreover in the presence of external magnetic fields the declination and inclination as shown by the app can have a large error. If you plan to design a sundial do not rely on these numbers, please use the measurement methods described in the author's site.
Sol Et Umbra needs the following permissions:
- network connection for clok sync (if not available, a smaller time accuracy will be obtained)
- GPS localization (if not available, the current position must be manually introduced)
- device camera
If the app crashes for whichever reason, Android can send a report to the author containing useful information to fix the problem.
PLEASE AUTHORIZE THE SHIPMENT OF THIS REPORT !
It does not contain any personal information.
More information on the program are available from the author's site:
http://digilander.libero.it/orologi.solari/download/SolEtUmbraENU.html
From this same site a complete free program for sundial design and simulation is available (Windows only).
Author can be contacted at the address:
(please send me an e-mail with your doubts and your ideas, I cannot answer to the comments posted on Google Play Store)
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