Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Design of a novel fully automatic ocean spectra acquisition and control system based on the real-time solar angle analyzing and tracking

Yang, Lei, Gao, Hao, Yu, Dingfeng, Pan, Shunqi, Zhou, Yan and Gai, Yingying 2021. Design of a novel fully automatic ocean spectra acquisition and control system based on the real-time solar angle analyzing and tracking. IEEE Access 9 , pp. 4752-4768. 10.1109/ACCESS.2020.3048117

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (4MB)

Abstract

The current manual spectra acquisition for monitoring water constituents has resulted in discontinuous data acquisition, insufficient amount of data, and small ocean coverage. This article presents the design of a novel fully automatic ocean spectra acquisition and control system based on the real-time solar angle analyzing and tracking. To ensure that the requirements for spectra acquisition are met, the system is capable of accurately calculating the solar angle by collecting the information of latitude, longitude, date, time and direction, and automatically adjusting the position of instrument observation plane and the pointing angle of fiber optic probe in real-time. It achieves full automation of collecting the downward radiance of skylight, the upward radiance from reference panel and seawater separately through controlling the rotation of fiber optic probe. A 188-day observation experiment was carried out at the coastal ocean experimental station in Qingdao from September 11, 2018 to March 17, 2019. After that, the system was conducted onboard the Dongfanghong 3 scientific research vessel for a one-month demonstration and sea trial in June 2019. Comparative experiments including manual spectra collection, chlorophyll-a sensor measurement, and water samples collection were carried out. The experimental results show that the relative error of the spectra between the system and manual collection is less than 5%, and the relative error of the remote sensing reflectance calculated by the spectra is less than 4%. Considering the chlorophyll-a concentration obtained by the sensor and the water samples as the true value, the relative error of the chlorophyll-a concentration obtained by the system is 10% and 25% respectively. The results show its full and reliable capacity in collecting spectra of seawater automatically and continuously in real-time, with satisfactory accuracy and timeliness.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 2169-3536
Date of First Compliant Deposit: 22 January 2021
Date of Acceptance: 23 December 2020
Last Modified: 22 Jan 2021 14:45
URI: http://orca.cf.ac.uk/id/eprint/137853

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics