Post-processing method of disposable LADCP ocean current profile observation data

A profile observation and throwaway technology, applied in the post-processing field of throwaway LADCP ocean current profile observation data, can solve the problem of inaccurate observation velocity data, and achieve the effect of accurate reference layer velocity

Active Publication Date: 2022-05-13
SECOND INST OF OCEANOGRAPHY MNR +1
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Problems solved by technology

[0003] In view of the deficiencies in the prior art, the object of the present invention provides a post-processing method for discarding type LADCP ocean current profile observation data, which can solve the problem of traditional throwing type LADCP observed The problem that the flow rate data is not accurate enough

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  • Post-processing method of disposable LADCP ocean current profile observation data
  • Post-processing method of disposable LADCP ocean current profile observation data
  • Post-processing method of disposable LADCP ocean current profile observation data

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[0037] In order to make the purpose, technical solution and advantages of the present application clearer, specific embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only parts relevant to the present application are shown in the drawings but not all content. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe various operations (or steps) as sequential processing, many of the operations may be performed in parallel, concurrently, or simultaneously. In addition, the order of operations can be rearranged. The proc...

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Abstract

The invention discloses a post-processing method for discarded LADCP ocean current profile observation data, and the method comprises the steps: throwing a chain-type LADCP into seawater, and obtaining observation data; removing the observation data to obtain qualified observation data; calculating the depth of each observation time point according to the qualified observation data so as to obtain the depth corresponding to each sample; calculating an average value of the qualified flow velocity samples, and taking the average value as a reference flow velocity corresponding to the depth; calculating to obtain the shear rate of each layer as the current layer, obtaining a plurality of shear rate samples, gridding all the obtained shear rate samples into a depth interval, and performing depth integration on the shear rate of the full water column from the reference layer to the sea surface to obtain the relative flow velocity of the full water column relative to the reference layer; the absolute flow rate at the depth z equals the flow rate at the depth relative to the reference layer plus the reference layer flow rate. The method is not influenced by ship traction, and does not depend on bottom tracking or GPS information.

Description

technical field [0001] The invention relates to the technical field of post-processing of marine seismic data, in particular to a post-processing method of discarded LADCP ocean current profile observation data. Background technique [0002] LADCP (Lowered Acoustic Doppler Current Profiler) current measurement can overcome the limitation of water depth compared with traditional walking ADCP (ocean current profiler), and it has the advantages of low cost and low risk compared with long-term anchor ADCP observation. Therefore, the data of the entire water column flow profile at fixed points can be obtained more conveniently in a short period of time. For this reason, LADCP has been widely used in the field of ocean current profile observation and other fields. The existing LADCP ocean current profile observation is often a drop-type LADCP, that is, the LADCP is loaded on the survey ship, relying on the ship to use the cable to lower the LADCP to the target seabed at a uniform ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G01C13/00
CPCG01V1/30G01C13/00G01V2210/1427G01V2210/6161Y02A90/10
Inventor 蔺飞龙牟勇丁涛周蓓锋梁楚进刘志奇
Owner SECOND INST OF OCEANOGRAPHY MNR
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