• Standard calibration
• Calibration via high-precision compass (currently only with Android)
• Expert calibration
To align your hand-held planetarium with the night sky, you will first have to point it at three different bright stars. In contrast to earlier versions of the app, where you only needed one star, the precision has been significantly improved and objects are easier to recognize. After successful calibration, a tone will sound and you will receive a brief message regarding sensor quality. 3 seconds later Universe2go will automatically change to a view of the night sky. Note: You can abort the star calibration by shaking the device. However, this may adversely affect alignment.
Calibration via high-precision compass
If a calibration turns out to be inaccurate, one reason may be heavy interference affecting the magnetic sensor. In this case, the compass will show a large deviation and stars will not be reliably aligned. The fine adjustment evaluates about 1000 sensor readings and corrects the compass interference. Proceed as follows: Select the menu in the view of the sky and scroll down to ‘Settings’. After selecting ‘Settings’, you click on the option ‘Compass fine adjustment’. You will see brief schematic instructions for carrying this out. In order to collect as many sensor readings as possible, turn in a circle while pointing the unit alternatively at the ground and then at the sky. A tone will chime if sufficient sensor readings have been detected. You do not need to look through the device during this procedure.
If you are already familiar with the night sky, then expert calibration is the correct choice for you. Point at a known bright star or planet, or at the Moon. The app assumes that exactly this object is located in the targeting circle. The precision of the app can hence be increased even with an inaccurate compass.
This is how it works:
1. About eye calibration (in the app, under Settings)
2. By measuring and entering the intraocular distance: Use the PD-ruler to measure your personal intraocular distance and enter the measurements separately (currently only for Android).
Why is it better to measure the intraocular distance?
The intraocular distance (or interpupillary distance) describes the distance of the pupil centre to the bridge of the nose. When looking through an optical instrument, both eyes should work together. Only when this distance is correct, can you enjoy relaxed viewing and optimally utilize the ability for stereo viewing. This measuring method enables accuracies of up to 1mm. Your advantage: The eye does not need to make any compensating movements and you can enjoy relaxed, far-distant viewing. And this even over a longer period of time. The Universe2go hand-held planetarium shows you the 3D-images in especially high quality. Overall, this method once again enhances the fun of observing.
Your PD measuring ruler is available here for downloading.
The headset is delivered with a USB cable. Plug the small end of this cable into the USB port of the headset for charging. Plug the other end into a PC or another source of power with the USB connector. This is how you charge the headset.