I have just downloaded and had a look at SunSurveyor. It's a nice app, with a smart interface and nice graphs.
But it's not for dialists. Where is the current value of the equation of time ? And where is the local time difference with respect to the time zone meridian ? When I look at a sundial I need to know which is the local true time, the time zone true time, the local mean time. Sometimes I also need to know which is the current italic time when evaluating an italic hours dial. I cannot find these info in this app. Moreover look at the azimuth value: it is expressed with one decimal figure. This corresponds to more than 20 seconds of time depending on the place latitude. This is not acceptable for dial design and check. Sol Et Umbra also features the possibility of dial simulation. This can be useful for educational activities but also for dials design (f.i. a friend of mine, a famous Italian dialists, intends to use SEU to show to the customer a first approximated drawing of the dial he will make). So my opinion is that these are two different apps with different purposes for different people. Sol Et Umbra is for dialists, Sun Surveyor it's not (but it has a wonderful graphic: I am jealous too !). Ciao. Gian ----Messaggio originale---- Da: rpa...@speakeasy.org Data: 10/10/2012 17.08 A: <sundial@uni-koeln.de> Ogg: Re: new app "Sol Et Umbra" for Android Here it is: http://www.sunsurveyor.com/2012/09/14/sun-surveyor-now-available-for-iphone-and-ipad/ On 10/10/2012 1:02 AM, Kevin Karney wrote: Very jealous! Can someone translate the code to iPhone..... Please! Kevin Kevin Karney Freedom Cottage, Llandogo, Monmouth, NP25 4TP Phone 01594 539 595. Mobile 07595 024 960 On 9 Oct 2012, at 22:59, "Simon [illustratingshadows" <illustratingshad...@yahoo.com> wrote: very nice app, beat me to it! :) Simon Simon Wheaton-Smith www.illustratingshadows.com Phoenix, Arizona, W112.1 N33.5 From: "sun.di...@libero.it" <sun.di...@libero.it> To: Sundial list Sundial list <sundial@uni-koeln.de> Sent: Tuesday, October 9, 2012 1:49 PM Subject: new app "Sol Et Umbra" for Android If you own an Android device (smartphone or tablet) you may want to take advantage of the new app "Sol Et Umbra" that means "Sun and Shadow". It is available for free from the usual Google app market. Sol Et Umbra is basically an app that shows sun ephemeris 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 rise, set and transit (local noon) - total number of hours of light Moreover Sol Et Umbra shows the time using italic, babilonic and temporal time systems. It also shows the time of Muslims prayers (that are strictly related to the position of the sun): Fajr, Zuhr, Asr1, Asr2, Maghrib and Isha. Sol Et Umbra can use the orientation sensors available in the device in order to compute and show the time lines of a sundial designed on the plane of the display. The graph is updated after any movement of the device. Finally the app can show the lighting conditions of a dial that is drawn on the device plane by means of an azimut / height graph that shows for any day in the year and for any hour in the day when the dial is lighted. More information on the program are available from my site: http://digilander. libero.it/orologi.solari/download/SolEtUmbraENU.html Ciao. Gian --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
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