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Princeton Satellite Systems currently has two iPhone applications available for download on the Apple App Store.
ChessNotePad is a chess recording and playback application. It can be used anywhere you would use paper and pencil to record chess games. Available now at the App Store!
ChessNotePad records games in PGN format as you and your opponent play. Forget pen and pencil! Once a game is complete, you can save it for later viewing and optionally email it to yourself and the opponent. You can also download or paste PGN games from the Internet and save them for later viewing.
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ChessNotePad App Frequently Asked Questions
Outer Space Defense is a game designed to teach relative orbit dynamics. Plays great natively on both iPhone and iPad! Available now at the App Store!
This game poses an addictive test of skill pitting your mastery of spacecraft orbital control and prowess with a laser against multiple attacking enemy satellites. See how long you last against a relentless enemy that launches satellites designed to take you out at a faster and faster pace!
You are one of a group of elite satellite operators tasked with controlling one of your country's few remaining surveillance satellites observing the enemy. In order to maintain surveillance, the satellite must be kept as close as possible to its optimal orbit. Watch out though, the enemy constantly sends killer satellites intended to destroy your surveillance satellite. You must avoid these or destroy them with your onboard laser. The longer you last, the faster they come!
As you thrust to maneuver, you use up fuel and as you fire your laser, you run down its battery. Luckily, orbiting fuel depots can replenish your satellite if you get close enough to them. Manage your resources to maximize your points.
Real orbital mechanics and control algorithms govern the motion and abilities of both your satellite and the enemy satellites. Make sure you don't stray too far from your optimal orbit. The closer you stay, the faster your points accumulate and if you get out of control, it's game over!
Three different thrust control modes: tilt-to-thrust, thumb sliders, or directional touch. Two different laser fire control modes: joystick plus button, or joystick alone.
Interested in learning about the theory behind the game? Click here to download a brief description of the coordinate systems, equations of motion, relative orbit dynamics, and control methods used in the game.
For support inquiries or additional information about theses application application, please use the form below, and we'll get back to you as soon as possible.