It is an effective way in integrated navigation by using Strapdown Inertial navigation System (SINS), GPS and Doppler Velocity Log (DVL).
利用捷联惯导(SINS)、GPS定位系统和多普勒计程仪(DVL)进行组合导航是水下运载器导航定位的有效方式。
The amount of time for a wave to travel a certain distance, proportional to the reciprocal of velocity, typically measured in microseconds per foot by an acoustic log and symbolized by tor DT.
波在某段距离传播的时间，与速度的倒数成正比，在声测井中，以每英尺多少毫秒来量度，用符号t或DT表示。
The results of preliminary experiments show that the distribution of stream-wise particle velocity follows the log-law, and the particle velocity is lower than the corresponding clean water flow.
试验可以得出颗粒三维运动的瞬时速度，初步试验得出颗粒的纵向平均速度遵循对数分布，颗粒速度小于相应水流的运动速度。
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