First Institute of Oceanography, Mnr

First Institute of Oceanography, Ministry of Natural Resources

Jingsong Guo

Zhixin Zhang

Dapeng Qu

Xin Zhou

Li Li

Yanxiong Liu

Fangli Qiao

Yanfeng Wang

Chen Xue

Shumin Jiang

Yuhuan Xue

Hongyu Ma

A wave spectrum calculation method based on GNSS wave measuring buoy is provided, which includes: placing GNSS drift buoys in the sea, collecting buoy position data; then obtaining three-dimensional velocity data of ocean waves; performing high pass filtering on velocity data of a sliding window to remove noise signals and trend terms, retaining wave motion data; calculating a cross spectrum and wave direction spectrum. The present disclosure solves limitations of traditional GNSS measurement methods applied to ocean buoy wave measurement, such as limited observation distance, high cost, tedious measurement and average calculation accuracy, and a need for correction services. The measurement accuracy is high and no additional correction services are required, which is more suitable for wave measurement, the wave spectrum algorithm in this method can adapt to more complex observation environments and incorporate results of a velocity measurement algorithm into a matched wave spectrum algorithm.

Wave spectrum calculation method based on GNSS wave measuring buoy

Disclosed is a LADCP and USBL combined observation device and a use method thereof. The device includes a cable winch system, a mounting frame, a LADCP system, a USBL beacon and a correction system. The LADCP system, the USBL beacon and the correction system can be mounted to the mounting frame by adopting a hardware support platform. The cable winch system can drive the LADCP system to deploy or recover along a vertical section. The LADCP system is used to obtain the current velocity of a single small profile, and the USBL beacon can locate the underwater position information, and the correction system can obtain data information in the seawater where the mounting frame is located, so as to calculate an absolute current velocity according to the velocity obtained by the LADCP system and the current data obtained by the correction system.

LADCP and USBL combined observation device and application method thereof

An anti-surge floating body, a seawater temperature measuring device and an integrated measuring system are provided. The floating material of the anti-surge floating body is in form of a closed loop, the floating material includes a first side close to a central axis of the floating material and a second side away from the central axis, and the wave-proof plate is connected with the second side of the floating material. The hollow space formed by the end-to-end connection of the floating material facilitates normal reception of solar radiation by the seawater, and avoids the influence on the temperature or other seawater parameters of the seawater below the floating material resulting from the floating material blocking solar radiation; moreover, the wave-proof plate can reduce the undulation and heaving of the waves of the seawater, and prevent turbulences of the seawater from affecting the seawater temperature or other seawater parameters.

Anti-surge floating body, seawater temperature measuring device and integrated measuring system

The present disclosure provides a LADCP-USBL combined observation and data processing method and an apparatus. According to one embodiment, an exemplary method may include: acquiring bottom tracking data from the LADCP, position trajectory data collected by the USBL, and ocean current data collected by the LADCP; removing abnormal data points from the position trajectory data; performing azimuth angle correction on the position trajectory data according to the bottom tracking data to determine a movement velocity of the LADCP; and calculating an absolute ocean current velocity according to the movement velocity of the LADCP and the ocean current data.

Lowered acoustic doppler current profiler, utra-short baseline (LADCP-USBL) combined observation and data processing method and apparatus

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Qingdao, China

Jingsong Guo