AstronomyDetermination of time, longitude, latitude, and azimuth . positions of the instrument. In no case must an azimuth depend upon less than 10 positions. At some of the triangulation stations where the accumulated twist of the triangulation isto be determined by a coincident longitude and azimuth station the azimuth is determinedwith an accuracy represented by a probable error of ±, and the observations are madeon at least two nights. DIRECTION METHOD—EXAMPLE OF RECORD AND COMPUTATION. There are shown below samples of records of azimuth observations on Polaris and thecomputations. The
AstronomyDetermination of time, longitude, latitude, and azimuth . positions of the instrument. In no case must an azimuth depend upon less than 10 positions. At some of the triangulation stations where the accumulated twist of the triangulation isto be determined by a coincident longitude and azimuth station the azimuth is determinedwith an accuracy represented by a probable error of ±, and the observations are madeon at least two nights. DIRECTION METHOD—EXAMPLE OF RECORD AND COMPUTATION. There are shown below samples of records of azimuth observations on Polaris and thecomputations. The observations were carried on at the same time that observations of hori-zontal directions were made at the primary triangulation station, Sears, in Texas. The chro-nometer correction and rate were determined from observations with a vertical circle on starsapproximately on the prime vertical. Examples of the time observations and computationsmade at Sears for use in the azimuth observations are shown on pages 54 and 55 of thispublication. No. 28. XVIII Z-6:7. XII CIRCUMPOLAR STARS. Polaris Station
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Keywords: ., bookauthoruscoasta, bookcentury1900, bookdecade1910, bookyear1913
