Multiaxial (optical measuring device)
Multiaxial be instruments in astronomy and geodesy known that the recorded celestial bodies in more complex movements than the rotation around an axis to follow.
The compensation of the daily rotation of the starry sky , which has long been tried and tested in observatories , takes place by rotating the so-called hourly axis , which is aligned with the celestial pole, in 23:56 hours. On the other hand, small lateral deviations in this tracking (transverse error) are compensated for by corrective rotations around the declination axis perpendicular to it . For closer to Earth celestial bodies located or for alternative telescope - Mounts However, three to four axes are required:
- For direction measurement to artificial earth satellites
- For azimuthal mounted astronomical telescopes ... (compensation of field rotation )