Method and apparatus for calibrating CTD observation information

Patent metadata

Field	Value
Publication number	US-12590937-B2
Application number	US-202318319424-A
Country	US
Kind code	B2
Filing date	May 17, 2023
Priority date	Dec 1, 2022
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

Provided is a conductivity temperature depth (CTD) observation information calibrating method and the CTD observation information calibrating method incudes receiving CTD observation raw information; calibrating the CTD observation raw information; and outputting calibrated CTD observation information.

First claim

What is claimed is:

1 . A conductivity temperature depth (CTD) observation information calibrating method, comprising:
receiving CTD observation raw information provided by a CTD device with respect to a region of a body of water; calibrating the CTD observation raw information, wherein calibrating the CTD observation raw information comprises writing pump flag information to the CTD observation raw information based on a pump state of the CTD device; outputting calibrated CTD observation information based on calibrating the CTD observation raw information; and outputting, from among the pump flag information written to the CTD observation raw information, flag information corresponding to the calibrated CTD observation information.

2 . The CTD observation information calibrating method according to claim 1 , wherein writing the pump flag information to the CTD observation raw information is according to a frequency associated with receiving the CTD observation raw information.

3 . The CTD observation information calibrating method according to claim 1 , wherein in the calibrating, first valid information is derived from the CTD observation raw information based on the pump flag information.

4 . The CTD observation information calibrating method according to claim 3 , wherein the calibrating includes:
generating second valid information by attenuating noise from the first valid information.

5 . The CTD observation information calibrating method according to claim 4 , wherein in the generating of second valid information, the second valid information is generated based on a predetermined median part of predetermined information for every water depth included in the first valid information.

6 . The CTD observation information calibrating method according to claim 4 , wherein in the calibrating, after determining whether water temperature information and salinity information included in the second valid information are present within a predetermined threshold water temperature range and a predetermined threshold salinity range, respectively, a predetermined missing value is inserted into the water temperature information present out of the threshold water temperature range and the salinity information present out of the threshold salinity range to generate third valid information.

7 . The CTD observation information calibrating method according to claim 6 , wherein in the calibrating, the missing value is inserted into information having a difference from information for every water depth adjacent by a predetermined degree which is equal to or larger than a predetermined degree in the third valid information and spike flag information is written to generate fourth valid information.

8 . The CTD observation information calibrating method according to claim 7 , wherein in the calibrating, consecutive same value flag information is written in the fourth valid information based on sameness of information within a predetermined unit water depth range to generate fifth valid information.

9 . The CTD observation information calibrating method according to claim 8 , wherein in the calibrating, climatic value flag information is written in information present out of a predetermined threshold climatic value range of the fifth valid information to generate sixth valid information.

10 . The CTD observation information calibrating method according to claim 9 , wherein in the calibrating, density inversion flag information is written in the sixth valid information based on density difference from an upper water depth within a predetermined range to generate the calibrated CTD observation information.

11 . The CTD observation information calibrating method according to claim 1 , wherein in the calibrating, when a specific value does not satisfy a condition, the specific value is replaced with a predetermined missing value.

12 . The CTD observation information calibrating method according to claim 1 , wherein in the calibrating, the pump flag information is written in the CTD observation raw information for every water depth.

13 . A non-transitory computer readable recording medium in which a program allowing a computer to execute the method of claim 1 is recorded.

14 . A conductivity temperature depth (CTD) observation information calibrating apparatus, comprising:
a receiving unit configured to receive CTD observation raw information provided by a CTD device with respect to a region of a body of water; a calibrating unit configured to calibrate the CTD observation raw information, wherein in calibrating the CTD observation raw information, the calibrating unit is configured to write pump flag information to the CTD observation raw information based on a pump state of the CTD device; and an output unit configured to:
output calibrated CTD observation information based on calibrating the CTD observation raw information; and
output, from among the pump flag information written to the CTD observation raw information, flag information which corresponds to the calibrated CTD observation information.

Assignees

• Nat Institute Of Meteorological Sciences

Inventors

• Jo Hyeong Jun
• Choo Sungho
• Kang Kiryong
• Lee Chulkyu
• Ko Kyungsuck

Classifications

• G01N33/18 Primary

  Water · CPC title