Wo ist Io Files

= Where is Io -- Astronomy in your pocket

== Description

Where is Io is an Android application for determining which moons of
Jupiter you are currently viewing.  It numerically calculates the
positions of all the moons as well the Earth and Jupiter, does the
projection from Earth's perspective, and pulls it all together in a
familiar spiral graph.

This is available in the Android Market if you search for "Where is
Io".

More information on the project can be found at http://dague.net/where-is-io

== Building

The source tree is an eclipse project, and should be buildable in
eclipse with the following caveat:

For my convenience I added an ndk builder for the .c code.  The ndk
build environment doesn't mix super cleanly with eclipse, so if you
want to build this yourself you'll need to mess with 
.externalToolBuilders/JNI Builder.launch

== License

The code for the code Android application is under GPLv3.  The
application includes 2 additional sources of code.

The main simulator is the work of Johannes Gajdosik as found in the
Stellarium source tree.  Those files are provided under the revised
BSD license that they are licensed under.  I did a jni wrapper on this
code for the application.

There is also an included SunriseSunset.java which is provided by John
Tauxe as public domain:
http://www.neptuneandco.com/~jtauxe/bits/index.html