NightMon-eco notes
Camera orientations
When installing the NightMon-eco you must point the face containing the cable gland toward geographical north. The lid surface must also be leveled. One way to have an approximate northward pointing may be to use a compass but be sure to correct for the magnetic pole declination. The magnetic declination is the difference between the magnetic pole and the geographic pole. It can be determined for your location following this link. The image produced by the upper camera (camera A) in such a way that the top being North and the left East.