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- Latitude by Polaris (aka North Star or Pole Star) is a very straightforward matter which does not require consulting any sight reduction tables. This is because Polaris is basically always located within one degree of the North Pole. This shot is available when you are sailing in the North Hemisphere above 5 degrees or so latitude.
- ex: The star Alioth has a azimuth of 43º39' and an altitude of 42º18' at 12:07am in Abiko, Japan, but in Dornbirn, Austria it has an azimuth of 13º07' and an altitude of 15º06' at 2:42am. However in both locations at different times the right ascension was12h54m1.8s and the declination was 55º57'35.8".
- 1. If Polaris has an altitude of +32 , what is the observer's latitude? Answer: Because Polaris is near the north celestial pole, the altitude of Polaris is approximately equal to the observer's latitude, 32 N. 2. An observer is located at latitude 38 N and longitude 79 W. Calculate the altitude of Polaris (the
- The horizontal angle from a star such as Polaris ( the North star) is measured at a known instant of time to a survey mark. From the measured time of observation, the azimuth of Polaris may be computed by spherical trigonometry. The survey mark's true azimuth is computed by combining the star's true azimuth with the measured angle, Field ...
- a back azimuth is a projection of the azimuth from the origin to the opposite side of the azimuth circle. i.e. there are 360 degrees in an azimuth circle, thus the opposite direction is 180 degrees.
- T F An azimuth determination using Polaris is generally more accurate than one using the Sun. Problem (8) ... T F At lower culmination Polaris is between the north pole and the observer's zenith. Problem (11) The dimensions of a rectangular field are142.1 ft by 93.6 ft. What is the area of the field expressed to a reasonable level of accuracy: ...
- astronomical azimuth of a line, especially between latitude 15° and 60° due to Polaris. Polaris is the star that helps anyone find his orientation towards the north. It makes a
- 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 ...
- The true azimuth of Polaris is tabulated in the Nautical Almanac in the Polaris Tables for northern latitudes up to 65°. Gathering Information: The entering arguments for the Polaris Tables are the LHA of Aries (GHA of Aries plus east longitude or minus west longitude) and latitude (at intervals of 5°, 10° or 20°).