Helios Sun Position Calculator App Android

Helios Sun Position Calculator is a powerful tool for Android users to determine the sun's position in the sky at any given time and location. This calculator provides accurate solar azimuth, altitude, and daylight hours, making it essential for solar energy systems, astronomy, and outdoor planning.

What is Sun Position?

The sun's position in the sky is defined by two key parameters: azimuth and altitude. Azimuth is the compass direction from which the sun is shining, measured in degrees from north (0°). Altitude is the angle of the sun above the horizon, ranging from 0° (sunrise/sunset) to 90° (zenith).

Understanding sun position is crucial for solar energy applications, agriculture, and navigation. The Helios calculator provides precise calculations based on your location and time, helping you optimize solar panel angles, plan outdoor activities, and study celestial mechanics.

How to Use the Calculator

Enter your location coordinates (latitude and longitude)
Select the date and time for your calculation
Click "Calculate" to get the sun's azimuth and altitude
View the results and chart visualization

The calculator uses the NOAA solar position algorithm to provide accurate results. You can also download the Helios app for Android to use the calculator on the go.

Formula Used

Solar Position Algorithm

The calculator uses the following formulas to determine sun position:

1. Julian Day (JD) calculation

2. Solar Mean Anomaly (M)

3. Equation of Center (C)

4. Ecliptic Longitude (λ)

5. Right Ascension (α)

6. Declination (δ)

7. Hour Angle (H)

8. Solar Zenith Angle (θ)

9. Solar Azimuth Angle (φ)

These calculations account for Earth's elliptical orbit, axial tilt, and atmospheric refraction to provide accurate results.

Worked Example

Let's calculate the sun position for New York City (40.7128° N, 74.0060° W) on June 21, 2023 at 12:00 PM EDT.

Julian Day: 2459747.0
Solar Mean Anomaly: 92.8726°
Equation of Center: 1.8736°
Ecliptic Longitude: 70.9652°
Right Ascension: 70.9652°
Declination: 23.4365° N
Hour Angle: 0°
Solar Zenith Angle: 66.5635°
Solar Azimuth Angle: 180° (South)

At this time, the sun is directly overhead (zenith angle of 66.56°) and shining from the south (azimuth angle of 180°).

FAQ

What is the difference between azimuth and altitude?: Azimuth is the compass direction from which the sun is shining, while altitude is the angle of the sun above the horizon.
How accurate is the Helios calculator?: The calculator uses the NOAA solar position algorithm, which is accurate to within ±0.0003° for most locations.
Can I use this calculator for solar panel installation?: Yes, the sun position data can help you determine the optimal angle for your solar panels to maximize energy production.
Does the calculator account for daylight saving time?: Yes, the calculator automatically adjusts for daylight saving time based on your selected time zone.
Is there a mobile app version available?: Yes, you can download the Helios Sun Position Calculator app for Android from the Google Play Store.