Marine Geodesy最新文献_第8页

Assessment of PRISMA Level-2 Hyperspectral Imagery for Large Scale Satellite-Derived Bathymetry Retrieval PRISMA二级高光谱成像用于大规模卫星测深反演的评估

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2022-01-22 DOI: 10.1080/01490419.2022.2032497

Evangelos Alevizos, T. Le Bas, D. Alexakis

{"title":"Assessment of PRISMA Level-2 Hyperspectral Imagery for Large Scale Satellite-Derived Bathymetry Retrieval","authors":"Evangelos Alevizos, T. Le Bas, D. Alexakis","doi":"10.1080/01490419.2022.2032497","DOIUrl":"https://doi.org/10.1080/01490419.2022.2032497","url":null,"abstract":"Abstract Currently, several satellite-derived bathymetry (SDB) workflows are based on a variety of satellite imagery which are analyzed by empirical or analytical methods. The latest availability of PRISMA hyperspectral data provides a new opportunity for testing their application in shallow water bathymetry mapping. Here we utilize two Level-2 PRISMA scenes from the Caribbean Sea capturing seafloor areas with diverse benthic features and we analyze them using the shallow water analytical models provided by the water-color simulator (WASI) software. The presented study examines the influence of spatial resolution and end-member spectra on the SDB output. Consequently, in one study area we apply inversion using additional reference spectra and in the other study area we exploit the PRISMA panchromatic band for producing a pan-sharpened, hyperspectral cube for bathymetry inversion. The results show good correlation with reference bathymetry data (sonar and admiralty chart) suggesting that PRISMA imagery has a clear potential in optical bathymetry studies. The use of appropriate end-member spectra assists in enhancing the accuracy of SDB, and pan-sharpened PRISMA imagery assists in improving the results when detailed bathymetry is required. PRISMA imagery can be effectively analyzed with open-source software WASI-2D and thus contribute new bathymetric data to regional-scale seafloor mapping projects.","PeriodicalId":49884,"journal":{"name":"Marine Geodesy","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42260802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Precise Point Positioning with GNSS Raw Measurements from an Android Smartphone in Marine Environment Monitoring 海洋环境监测中基于Android智能手机GNSS原始测量的精确点定位

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2022-01-12 DOI: 10.1080/01490419.2022.2027831

N. Tunalioglu, T. Ocalan, Ali Hasan Doğan

引用次数: 4

Case Study: Rigorous Boresight Alignment of a Marine Mobile LiDAR System Addressing the Specific Demands of Port Infrastructure Monitoring 案例研究:满足港口基础设施监测特定需求的海上移动激光雷达系统的严格轴视对准

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2022-01-11 DOI: 10.1080/01490419.2022.2025503

Mohsen H. Shahraji, C. Larouche

{"title":"Case Study: Rigorous Boresight Alignment of a Marine Mobile LiDAR System Addressing the Specific Demands of Port Infrastructure Monitoring","authors":"Mohsen H. Shahraji, C. Larouche","doi":"10.1080/01490419.2022.2025503","DOIUrl":"https://doi.org/10.1080/01490419.2022.2025503","url":null,"abstract":"Abstract Accurate infrastructure monitoring of ports and harbors is a vital operation conducted by the port’s authority. To operate regularly in this highly dynamic environment, we explore the potential of the cutting-edge mobile LiDAR systems (MLS) mounted on a vessel. To generate a high-quality 3 D point cloud that would satisfy the expected accuracy required in the monitoring task, the LiDAR scanner and the positioning and orientation system (POS) must be angularly aligned also known as boresight alignment. In this research, we introduce a boresight alignment methodology adapted to the port infrastructure surveillance based on prefabricated planar targets. After an analysis of planar target simulated data, we propose a boresight alignment site design. Then, we apply this boresight alignment site design in a real-world scenario. Obtained results estimate accurately roll and yaw angles errors with standard deviations of less than 0.002 degrees and pitch angle error with standard deviation less than 0.015 degrees. Finally, we defined a validation site and described the procedure that uses these features to validate the quality of the estimated parameters. The relative comparison of the georeferenced point clouds, before and after boresight alignment demonstrates the mitigation of the boresight systematic error impact on the final point cloud.","PeriodicalId":49884,"journal":{"name":"Marine Geodesy","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42978508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Establishing a Marine Gravity Database around Egypt from Satellite Altimetry-Derived and Shipborne Gravity Data 利用卫星测高数据和船载重力数据建立埃及周围海洋重力数据库

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2021-12-30 DOI: 10.1080/01490419.2021.2020185

A. Zaki, Mahmoud Magdy, M. Rabah, A. Saber

{"title":"Establishing a Marine Gravity Database around Egypt from Satellite Altimetry-Derived and Shipborne Gravity Data","authors":"A. Zaki, Mahmoud Magdy, M. Rabah, A. Saber","doi":"10.1080/01490419.2021.2020185","DOIUrl":"https://doi.org/10.1080/01490419.2021.2020185","url":null,"abstract":"Abstract For the purpose of marine geoid modeling and many other geodetic and geophysical applications, a marine gravity map around Egypt is established by the integration of gravity data provided by satellite altimetry and shipborne gravimetric observations. Firstly, the collected shipborne data were compared with GO_CONS_GCF_2_TIM_R6 and XGM2019e GGMs and with SSv29.1 and DTU17 altimetry models. Then, a pre-refinement of ship marine surveys was done with a rigorous condition, in which a number of 6525 points have been removed from the dataset. After that, 87709 points were deducted from the pre-filtered shipborne dataset to fit the study area and the cross-validation approach with the kriging interpolation algorithm were applied. A rigorous level of confidence was decided in this step where the points which have differences between the estimated and the observed values more than twice the STD of the residuals were removed until the STD reached a value less than 1 mGal. Finally, the filtered shipborne gravity data were combined with DTU17 (the best evaluation model) using the least-squares collocation technique (LSC). The final gravity map was tested using 8000 randomly chosen shipborne stations, which were not included when applying LSC, revealing the significant enhancement gained after the integration process.","PeriodicalId":49884,"journal":{"name":"Marine Geodesy","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48218934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Evaluation of the ERA5 Significant Wave Height against NDBC Buoy Data from 1979 to 2019 1979 - 2019年ERA5有效波高与NDBC浮标数据的比较

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2021-12-16 DOI: 10.1080/01490419.2021.2011502

Jichao Wang, Yue Wang

{"title":"Evaluation of the ERA5 Significant Wave Height against NDBC Buoy Data from 1979 to 2019","authors":"Jichao Wang, Yue Wang","doi":"10.1080/01490419.2021.2011502","DOIUrl":"https://doi.org/10.1080/01490419.2021.2011502","url":null,"abstract":"Abstract Significant wave height (SWH) is a vital parameter in marine science research and engineering application. The up-to-date reanalysis product ERA5 SWH brings new possibilities to the long-term analysis. However, a systematic assessment of ERA5 SWH on a large scale is still lacking. This paper presents an evaluation of ERA5 SWH against observations from 103 buoys in the North American Atlantic and Pacific sourced by the National Data Buoy Center over the period 1979 to 2019. Overall, the ERA5 SWH has a good agreement with the in-situ observations, with a bias of −0.058 m, root mean squared error of 0.325 m, correlation coefficient of 0.961 and scatter index of 18.54%. The accuracy of ERA5 SWH is satisfactory under the most typical sea states (0.5 m < SWH < 4 m). The monthly analysis shows the performance of ERA5 SWH in summer is the best. The water depth and offshore distance have also been identified to impact the reliability of ERA5 SWH. Although the statistics vary at different locations, the performances of ERA5 SWH at most stations are reasonable. In addition, an evident improvement in the validity over time is observed, which can be attributed to the assimilation of the altimeter wave height.","PeriodicalId":49884,"journal":{"name":"Marine Geodesy","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46796619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Impact of Initial and Boundary Conditions on Coupled Model Simulations for Bay of Bengal 初始和边界条件对孟加拉湾耦合模型模拟的影响

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2021-12-15 DOI: 10.1080/01490419.2021.2006376

Shailee Patel, Manisha Vithalpura, S. Mallick, S. Ratheesh

{"title":"Impact of Initial and Boundary Conditions on Coupled Model Simulations for Bay of Bengal","authors":"Shailee Patel, Manisha Vithalpura, S. Mallick, S. Ratheesh","doi":"10.1080/01490419.2021.2006376","DOIUrl":"https://doi.org/10.1080/01490419.2021.2006376","url":null,"abstract":"Abstract This study investigates the response of a high resolution coupled physical-ecosystem model simulations to initial and boundary conditions (IBCs) from various sources. For this purpose, we used physical parameters from the data sets World Ocean Atlas (WOA09), CSIRO Atlas of Regional Seas (CARS09) and North Indian Ocean Atlas (NIOA). Evaluating model simulated fields with standard validation data suggests that all three experiments could resolve most of the known surface and subsurface features of the Bay of Bengal (BoB) but with considerable differences in salinity and chlorophyll-a (Chl-a) and negligible differences in temperature among model simulations with various IBCs. The modeled Chl-a is well simulated with WOA09 as compared to NIOA and CARS09 data for climatological model simulations, with a correlation of 0.52 for the BoB. Moreover, the vertical distribution of Chl-a is found to be a function of nutrient supply to the base of the euphotic layer and mixed layer. These results significantly highlight the implicit and explicit use of IBCs for better representation of Chl-a concentration in the BoB from a high-resolution coupled model.","PeriodicalId":49884,"journal":{"name":"Marine Geodesy","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42505934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Validating a New GNSS-Based Sea Level Instrument (CalNaGeo) at Senetosa Cape 在塞内托萨角验证基于gnss的新海平面仪(CalNaGeo)

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2021-12-13 DOI: 10.1080/01490419.2021.2013355

P. Bonnefond, O. Laurain, P. Exertier, M. Calzas, T. Guinle, N. Picot

{"title":"Validating a New GNSS-Based Sea Level Instrument (CalNaGeo) at Senetosa Cape","authors":"P. Bonnefond, O. Laurain, P. Exertier, M. Calzas, T. Guinle, N. Picot","doi":"10.1080/01490419.2021.2013355","DOIUrl":"https://doi.org/10.1080/01490419.2021.2013355","url":null,"abstract":"Abstract The geodetic Corsica site was set up in 1998 in order to perform altimeter calibration of the TOPEX/Poseidon (T/P) mission and subsequently, Jason-1, OSTM/Jason-2, Jason-3 and more recently Sentinel-6 Michael Freilich (launched on November, 21 2020). The aim of the present study held in June 2015 is to validate a recently developed GNSS-based sea level instrument (called CalNaGeo) that is designed with the intention to map Sea Surface Heights (SSH) over large areas. This has been undertaken using the well-defined geodetic infrastructure deployed at Senetosa Cape, and involved the estimation of the stability of the waterline (and thus the instantaneous separation of a GNSS antenna from water level) as a function of the velocity at which the instrument is towed. The results show a largely linear relationship which is approximately 1 mm/(m/s) up to a maximum practical towing speed of ∼10 knots (∼5 m/s). By comparing to the existing “geoid” map, it is also demonstrated that CalNaGeo can measure a sea surface slope with a precision better than 1 mm/km (∼2.5% of the physical slope). Different processing techniques are used and compared including GNSS Precise Point Positioning (PPP, where the goal is to extend SSH mapping far from coastal GNSS reference stations) showing an agreement at the 1-2 cm level.","PeriodicalId":49884,"journal":{"name":"Marine Geodesy","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43403790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A Hybrid Iterated Greedy Algorithm for Hydrographic Survey Routing Problem 水文测量路由问题的混合迭代贪婪算法

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2021-11-12 DOI: 10.1080/01490419.2021.1993386

S. D. Dao, Antoine Mallégol, P. Meyer, Mehrdad Mohammadi, S. Loyer

{"title":"A Hybrid Iterated Greedy Algorithm for Hydrographic Survey Routing Problem","authors":"S. D. Dao, Antoine Mallégol, P. Meyer, Mehrdad Mohammadi, S. Loyer","doi":"10.1080/01490419.2021.1993386","DOIUrl":"https://doi.org/10.1080/01490419.2021.1993386","url":null,"abstract":"Abstract Hydrographic surveying is a necessary task in the maritime community, which can contribute to maritime security, economic development, scientific research, and environmental protection. Hydrographic surveying is a regular and costly activity; hence, careful hydrographic survey planning is required. Hydrographic survey routing is one of the main tasks in hydrographic survey planning, in which we not only need to find the most interesting maritime area(s) (usually evaluated through a risk measure, aggregating navigation risk, environmental impact, and/or data obsolescence), but also the shortest route to do the hydrographic surveying. In this article, first, we attempt to formulate the hydrographic survey routing problem and then develop an efficient hybrid iterated greedy algorithm to solve the problem. The proposed algorithm consists of three stages, that is, Stage 1 with a memetic algorithm to find a good starting point, Stage 2 with a global greedy algorithm to explore the global search space, and Stage 3 with a local greedy algorithm to exploit the local search space. Five real case studies in France are conducted to validate the performance of the developed algorithm.","PeriodicalId":49884,"journal":{"name":"Marine Geodesy","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48302724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Historical Shoreline Analysis and Field Monitoring at Ennore Coastal Stretch along the Southeast Coast of India 印度东南海岸埃诺尔海岸历史岸线分析与现场监测

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2021-11-08 DOI: 10.1080/01490419.2021.1992546

D. M, V. S., S. S. A., M. K

{"title":"Historical Shoreline Analysis and Field Monitoring at Ennore Coastal Stretch along the Southeast Coast of India","authors":"D. M, V. S., S. S. A., M. K","doi":"10.1080/01490419.2021.1992546","DOIUrl":"https://doi.org/10.1080/01490419.2021.1992546","url":null,"abstract":"Abstract A shoreline change analysis has been carried out for the coastal stretch from Ennore creek to Karungali village located along the southeast coast of India. This 15 km-long coastal stretch had undergone significant changes such as erosion and accretion concerning infrastructure developments and leading to large impact on the livelihood of the community. To assess the shoreline changes, the analysis of multi-temporal satellite images has been carried out. A historical trend is established for the study period from 1991 to 2019. The analysis has been made in three timelines considering various developing activities. There was no significant coastal infrastructure development during 1991 to 1999; however, between 1999 and 2009, a major port, pier, and a groyne field were constructed. Additionally, a port was established between 2009 and 2019. Erosion was observed on the coast from Kattupalli to Karungali at a rate of −16.85 m/yr since 2009, while the coast on the south of Ennore port is accreting at the rate of +12.43 m/yr during the same period. The near-future projection using a linear regression model shows further erosion in the coast under similar conditions. The results of this study provide a baseline data for future anthropogenic activities along this coast.","PeriodicalId":49884,"journal":{"name":"Marine Geodesy","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41709499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

P-Order Secant Method for Rapidly Solving the Ray Inverse Problem of Underwater Acoustic Positioning 快速求解水声定位射线逆问题的p阶割线法

IF 1.6 4区地球科学

Marine Geodesy Pub Date : 2021-10-19 DOI: 10.1080/01490419.2021.1992547

Wenlong Yang, S. Xue, Yixu Liu

{"title":"P-Order Secant Method for Rapidly Solving the Ray Inverse Problem of Underwater Acoustic Positioning","authors":"Wenlong Yang, S. Xue, Yixu Liu","doi":"10.1080/01490419.2021.1992547","DOIUrl":"https://doi.org/10.1080/01490419.2021.1992547","url":null,"abstract":"Abstract The computational efficiency of underwater acoustic positioning based on the ray tracing is mainly limited to a great amount of calculation of ray inverse problem. We propose two kinds of p-order secant methods to improve the efficiency of traditional method, and the proposed methods can be regarded as a generalization of the traditional secant method from two points to p points for rapidly solving the inverse problem. In the proposed methods, the calculation information in previous iterations is utilized to fit a polynomial model to speed up the algorithm convergence. In the first-kind method, the inverse problem is calculated by solving a polynomial equation approximating the function mapping from the emission angle to the radial distance of the ray. In the second-kind method, the inverse problem is however directly solved by approximating the function mapping from the radial distance to the emission angle. As the first-kind method needs to solve a p-order polynomial equation, the practicability of this method is limited to the complexity of solving the high-order equation, while the second-kind method can directly approximate the solution of the inverse problem, which is more practical and flexible. The proposed methods have been verified in deep-sea trial. It shows that, the proposed methods can precisely produce the solution of the acoustic ray inverse problem within one iteration, and the computational efficiency of proposed method is about 6 times faster than that of the traditional method.","PeriodicalId":49884,"journal":{"name":"Marine Geodesy","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44242204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2