| 印度洋某测区多波束测量声速改正分析 |
| Analysis of Sound Velocity Correction for Multi-beam Measurement in A Survey Area in the Indian Ocean |
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| 中文关键词: 多波束测深 海水声速 声速剖面 声速改正 |
| 英文关键词:multi-beam sounding water velocity of sound sound velocity profile correction of sounding wave velocity |
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| 中文摘要: |
| 海水声速是影响多波束测深精度的主要因素之一，声速改正方法是否正确直接关系测量结果的精度和可靠性。要保证多波束测深精度，除须具备符合精度要求的多波束系统及其外围设备外，在测量过程中还必须保证各项校正和改正的精度，而在各项校正和改正过程中最难以控制精度的因素便是声速改正.因此，应在测量前充分了解测区的声速变化情况，掌握海区声速变化特征，确定合理的声速剖面测量间隔和布设方位。本文阐述了海水声速特性，分析了印度洋某测区温度、盐度、声速变化规律，对多波束测深进行了正确的声速改正。 |
| 英文摘要: |
| The sound velocity of seawater is one of the main factors affecting the accuracy of multi-beam sounding，the accuracy and reliability of measurement results are directly related to the correctness of sound velocity correction method.The accuracy of multi-beam sounding should be guaranteed，except for the multi-beam system and its peripheral equipment which meet the requirements of precision，in the process of measurement，the accuracy of each correction must be guaranteed，and in the course of each correction，the most difficult factor to control accuracy is velocity correction.Therefore，the variation of sound velocity in the measurement area should be fully understood before measurement，master the characteristics of sound velocity variation in sea area，determine reasonable sound velocity profile measurement interval and layout azimuth.The acoustic velocity characteristics of seawater are described in this paper，the variation law of temperature、salinity、sound velocity in a survey area of Indian Ocean is analyzed，the correct correction of sound velocity for multi-beam sounding is made. |
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