Text Encryptor Free
Start by choosing your secret number. This number will serve as a key for encryption and decryption. Don´t forget it otherwise you won´t be able to recover your text again. … Read More
Category: Solutions
QR Code Free Generator
Use the following free web app to generate a QR code. First enter the website or the URL you want to generate the QR code for it. But any other … Read More
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 … Read More
Sun Right Ascension
Wikipedia defines Right ascension (RA) as the angular distance of a particular point measured eastward along the celestial equator from the Sun at the March equinox to the (hour circle … Read More
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 … Read More
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)) … Read More
Calculating Sun Declination
Declination of the sun is the angle between the equator and a line drawn from Earth to Sun center to center. The declination angle varies seasonally due to 2 factors … Read More
Calculate Sunlight Hours
The duration of sunlight follows a simple harmonic motion. It is periodic and repeats every year. In the Northern Hemisphere, the longest day is June 21, and the shortest is … Read More
Julain Day Calculation
How To Calculate the Julian Day These are the steps: let a = (10000.0 * year) + (100.0 * (month)) + day; note: a should be > -47120101 If … Read More