| 三角高程测量——垂直角观测的最佳时间 |
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| 引用本文： | 孙伟.三角高程测量——垂直角观测的最佳时间[J].海岸工程,2000,19(2):73-76. |
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| 作者姓名： | 孙伟 |
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| 作者单位： | 山东省筑港总公司!山东青岛266032 |
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| 摘 要： | 三角高程测量的精度一方面取决于仪器的精度和采用的方法，另一方面还取决于自然条件的影响，对测得的成果进行评差、改正才能大大的提高精度。在外业观测中，由于受自然条件的影响和局限，诸如地形起伏、大气折光、气流、云雾等因素对于我们的观测都是有害的。并且，这些因素不是人为的，对成果的影响很难确定。随着一些先进仪器的不断出现，从现行的规范标准对用全站仪诸类仪器进行三角高程测量可替代“四等水准测量”这一规定可看出：如果解决了垂直角观测这一受外界自然条件影响较大的难题，三角高程测量在特殊条件下可替代水准测量，其应用是很有前途的。
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| 关 键 词： | 三角高程测量 垂直角 观测 云雾 改正 起伏 四等水准 大气折光 全站仪 特殊条件 |
THE BEST TIME OF TRIGONOMETRIC LEVELING VERTICAL ANGLE OBSERVING |
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| SUN Wei.THE BEST TIME OF TRIGONOMETRIC LEVELING VERTICAL ANGLE OBSERVING[J].Coastal Engineering,2000,19(2):73-76. |
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| Authors: | SUN Wei |
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| Abstract: | The precision of trigonometric leveling depends upon the precision of the instruments, the method, and the natural condition, altering the results could improve the precision At outside, the natural condition such as the topographies rise and fall, the atmospheres refractive power, the air current, the fog and so on All of these were harmful to our servey And their affects were difficulty to determine Along with the advanced instruments were used, the trigonometric leveling could take place the leveling If we overcome the natural condition affects, the trigonometric leveling could take place the leveling in special conditions And it was valuable for future |
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| Keywords: | trigonometric leveling vertical angle observing best time |
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