However, the precise measurement is not to rely on the sun, but by a stellar altitudeandazimuth for measurement and reckoning.
不过，精确的测量不是靠太阳，而是靠某恒星的高度和方位来进行测量和推算的。
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This article gives a method of getting position by altitudeandazimuth of simple celestial body, the result is very important for improving the chance of celestial positioning.