Parallax in the "Pi of the Sky" project

Since March 2011 the "Pi of the Sky" project has two observatories in use: one in northern Chile and next one in southern Spain. Since then we are able to observe a parallax of objects, which passes close to the Earth. This is very important to us, because this allow us to reject false triggers, due tu cosmic radiation, meteors, planes, etc. I will tell about theoretical limitations of our parallax observations. Moreover I will show first results.