Polaris azimuth

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As Polaris azimuth is the astrogeodetic direction finding ( azimuth of a terrestrial target with the help of) North Star called.

The procedure is one of the most accurate azimuth methods in geodetic astronomy , although the procedure is basically simple:

  • Aiming at the survey point (it should be a distant point at least 5 km away)
  • Aiming at the Pole Star in position I, reading of the partial circle and time
  • Striking the theodolite
  • Aiming at the North Star in position II, etc.
  • Aiming at the survey point in circle position II.

With the location of the observer, geographic coordinates and the times of star targeting, the azimuth can be calculated, and the terrestrial azimuth can be calculated from the directional difference measured on the theodolite.

The most important applications of the method, which gives an accuracy in the range of ± 1 "in about 10 minutes, are

Also Tagbeobachtungen the North Star are quite possible. If the sky is cloudless and deep blue, a common theodolite is enough. The star can only be found if the north direction is known to within 1–2 °. Its deviation from this can be around 1 °, and its elevation angle corresponds approximately to the geographical latitude ± 0.7 °.