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# Tag: WebApps

## Sunset Calculation

Knowing the earth rotation and revolution correctly makes it possible to calculate the time and angle of sunset precisely for any location on Earth as we did with sunrise. We should be aware that there are areas near the poles where the sun remains visible or invisible the whole day. We can calculate sunset from… Continue reading Sunset Calculation

## Sun Rise Calculations

Knowing the earth rotation and revolution correctly makes it possible to calculate the time and angle of sunrise precisely for any location on Earth. We should be aware that there are areas near the poles where the sun remains visible or invisible the whole day. We can calculate sunrise from longitude and equation of time.… Continue reading Sun Rise Calculations

## Sun Distance

Sun distance from earth ranges from 147 million kms to 152 Million kms. Sun distance depends on the time of the year and it is less in winter and more in Summer. The following web app gives this value for any day during the year: Year Sun Distance Today : – Created with Apache Echarts… Continue reading Sun Distance

## Equation of Time

Equation of time is the difference between apparent solar time and mean solar time. EOT = apparent solar time – mean solar time Wikipedia defines EOT by the follwoing: The equation of time describes the discrepancy between two kinds of solar time. The word equation is used in the medieval sense of “reconcile a difference”.… Continue reading Equation of Time

## Islamic Crescent

Moslems Must Observe the apparent movement of the sun across the sky in order to performs prayers. There is no consensus on the times of the prayers among different Moslem factions and developing an algorithm was affected by this fact. For example, Sun depression angle considered to calculate Fajr and Isha prayers are not agreed… Continue reading Islamic Crescent

## Directions On Map

The direction between any two places on Earth can be calculated using the spherical trigonometry. We can use the following equation to do that Direction Angle =tan-1 (sin(longitude2 – longitude1)/cos(latitude1)*tan(latitude2)-sin(latitude1)*cos(longitude2-longitude1)) In spherical trigonometry values of latitude and longitude represent angles as in the following diagram: Example One famous example is The Islamic Qibla. Muslims need… Continue reading Directions On Map

## Sun Calc

The Movement of earth and planets around the sun can be calculated quite well. This is a web app which enables you to know the times of sunrise, sunset and other values . It is possible for your location or any other location on earth you like. Just make sure to enter correct values of… Continue reading Sun Calc

## Prayer Times And Qibla

This App is designed to enable people to get Islamic prayers schedule from any place on earth and at any time of the year. Here the web app: Islamic Prayers 🕋 Islamic Prayers Times Day Month Year Hour Minute Second TimeZone Latitude Longitude Prayer Time Notes Fajr If values are not valid ,use astronomical twilight… Continue reading Prayer Times And Qibla