Introduction
The Aurora Forecast 3D is a tool to track down where the aurora is located in the sky from any location on planet. It renders Earth in 3D with rotation and scaling at your fingertips. You can select locations and make your own ground - station list. The Sun illuminates the globe as it updates in near real-time (1 second epochs). The forecasts are +0, +1 and +4 hours ahead in time. These are updated every 15 minutes when the app is active and connected to internet.

Aurora Forecast 3D screen shots from a B15Q Cat phone running Android 4.4.2.

An Aurora Compass is included that shows where the auroral oval, the Moon and the Sun are located as you look up at the sky from your location. The phase and age of the Moon is also visualized in the compass. By zooming out in the 3D view port, stars and planets appear in their orbits around the Sun.

FEATURES
- 3D view port of Earth with zoom and rotation enabled.
- Solar illumination of the Earth and the Moon.
- Aurora oval size and location in real time [1,2].
- Forecasts based on predicted NOAA-SWPC Kp index.
- Color scaled Kp speedometer.
- Aurora Compass sky view display.
- Editable station / location list.
- Go to animation.
- Right Ascension and Declination of the Moon, Sun and 8 planets [3].
- Age of the Moon including the phase.
- Includes a 2.4 million star map [4].
- City light texture [5].
- Earth, Sun and Moon textures [6,7].
- Skyview module to track planets and stars [8].
- Geomagnetic storm index G1 to G5 alert notifications.

Mobile phone downloads
Google Play links:
Link for Android or Link for computer
Or search for "Aurora Forecast 3D" by Fred Sigernes on Google Play.

Please read the Quick look guide before installation.


Computer Downloads
PlattformsLink (*.zip)Size (Mb)
Windows 32-bit AuroraForecast3D_Win3210.1
Windows 64-bit AuroraForecast3D_Win6410.8
Apple OSX AuroraForecast3D_OSX12.3
Installation: Unpack the zip file. Place the executable file in any directory of choice and just run it. Setup .txt files will be generated automatically and located in your Documents folder.

References
[1] Sigernes F., M. Dyrland, P. Brekke, S. Chernouss, D.A. Lorentzen, K. Oksavik, and C.S. Deehr, Two methods to forecast auroral displays, Journal of Space Weather and Space Climate (SWSC), Vol. 1, No. 1, A03, DOI:10.1051/swsc/2011003, 2011.

[2] Starkov G. V., Mathematical model of the auroral boundaries, Geomagnetism and Aeronomy, 34 (3), 331-336, 1994.

[3] P. Schlyter, How to compute planetary positions, http://stjarnhimlen.se/, Stockholm, Sweden.

[4] Bridgman, T. and Wright, E., The Tycho Catalog Sky map- Version 2.0, NASA/Goddard Space Flight Center Scientific Visualization Studio, http://svs.gsfc.nasa.gov/3572, January 26, 2009.

[5] The Visible Earth catalog, http://visibleearth.nasa.gov/, NASA/Goddard Space Flight Center, April-October, 2012.

[6] T. Patterson, Natural Earth III - Texture Maps, http://www.shadedrelief.com, October 1, 2016.

[7] Nexus - Planet Textures, http://www.solarsystemscope.com/nexus/, January 4, 2013.

[8] Hoffleit, D. and Warren, Jr., W.H., The Bright Star Catalog, 5th Revised Edition (Preliminary Version), Astronomical Data Center, NSSDC/ADC, 1991.

Acknowledgement
We wish to thank the National Oceanic and Atmospheric Administration (NOAA) - Space Weather Prediction Centre (SWPC) for allowing us to download the predicted value of the estimated Kp index every 15 minutes.