On performance of CryoSat-2 altimeter data in deriving marine gravity over the Bay of Bengal

2021 ◽  
Vol 42 (4) ◽  
Author(s):  
Hui Ji ◽  
Xin Liu ◽  
Chengcheng Zhu ◽  
Jiajia Yuan ◽  
Bing Ji ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Altimeter Data ◽  
Marine Gravity

scholarly journals CONTRIBUTION OF SATELLITE ALTIMETRY DATA IN GEOLOGICAL STRUCTURE RESEARCH IN THE SOUTH CHINA SEA

2016 ◽  
Vol XLI-B8 ◽  
pp. 1187-1190 ◽  
Author(s):  
Tuan Dung Tran ◽  
Thi Huong Mai Ho
Keyword(s):  
Satellite Altimetry ◽  
Geological Structure ◽  
Altimeter Data ◽  
Altimetry Data ◽  
The South ◽  
Satellite Altimeter ◽  
China Sea ◽  
Geological Features ◽  
Marine Gravity ◽  
Satellite Altimetry Data

The study area is bordered on the East China Sea, the Philippine Sea, and the Australian-Indo plate in the Northeast, in the East and in the South, respectively. It is a large area with the diversely complicated conditions of geological structure. In spite of over the past many years of investigation, marine geological structure in many places have remained poorly understood because of a thick seawater layer as well as of the sensitive conflicts among the countries in the region. <br><br> In recent years, the satellite altimeter technology allows of enhancement the marine investigation in any area. The ocean surface height is measured by a very accurate radar altimeter mounted on a satellite. Then, that surface can be converted into marine gravity anomaly or bathymetry by using the mathematical model. It is the only way to achieve the data with a uniform resolution in acceptable time and cost. The satellite altimetry data and its variants are essential for understanding marine geological structure. They provide a reliable opportunity to geologists and geophysicists for studying the geological features beneath the ocean floor. Also satellite altimeter data is perfect for planning the more detailed shipboard surveys. Especially, it is more meaningful in the remote or sparsely surveyed regions. <br><br> In this paper, the authors have effectively used the satellite altimetry and shipboard data in combination. Many geological features, such as seafloor spreading ridges, fault systems, volcanic chains as well as distribution of sedimentary basins are revealed through the 2D, 3D model methods of interpretation of satellite-shipboard-derived data and the others. These results are improved by existing boreholes and seismic data in the study area.

scholarly journals CONTRIBUTION OF SATELLITE ALTIMETRY DATA IN GEOLOGICAL STRUCTURE RESEARCH IN THE SOUTH CHINA SEA

2016 ◽  
Vol XLI-B8 ◽  
pp. 1187-1190
Author(s):  
Tuan Dung Tran ◽  
Thi Huong Mai Ho
Keyword(s):  
Satellite Altimetry ◽  
Geological Structure ◽  
Altimeter Data ◽  
Altimetry Data ◽  
The South ◽  
Satellite Altimeter ◽  
China Sea ◽  
Geological Features ◽  
Marine Gravity ◽  
Satellite Altimetry Data

The study area is bordered on the East China Sea, the Philippine Sea, and the Australian-Indo plate in the Northeast, in the East and in the South, respectively. It is a large area with the diversely complicated conditions of geological structure. In spite of over the past many years of investigation, marine geological structure in many places have remained poorly understood because of a thick seawater layer as well as of the sensitive conflicts among the countries in the region. <br><br> In recent years, the satellite altimeter technology allows of enhancement the marine investigation in any area. The ocean surface height is measured by a very accurate radar altimeter mounted on a satellite. Then, that surface can be converted into marine gravity anomaly or bathymetry by using the mathematical model. It is the only way to achieve the data with a uniform resolution in acceptable time and cost. The satellite altimetry data and its variants are essential for understanding marine geological structure. They provide a reliable opportunity to geologists and geophysicists for studying the geological features beneath the ocean floor. Also satellite altimeter data is perfect for planning the more detailed shipboard surveys. Especially, it is more meaningful in the remote or sparsely surveyed regions. <br><br> In this paper, the authors have effectively used the satellite altimetry and shipboard data in combination. Many geological features, such as seafloor spreading ridges, fault systems, volcanic chains as well as distribution of sedimentary basins are revealed through the 2D, 3D model methods of interpretation of satellite-shipboard-derived data and the others. These results are improved by existing boreholes and seismic data in the study area.

scholarly journals MINIMUM SWELL HEIGHTS OVER ARABIAN SEA AND BAY OF BENGAL DERIVED FROM GEOSAT ALTIMETER DATA

MAUSAM ◽  
2022 ◽  
Vol 44 (3) ◽  
pp. 290-291
Author(s):  
USHA NATESAN ◽  
S. P. SUBRAMANIAN
Keyword(s):  
Bay Of Bengal ◽  
Arabian Sea ◽  
Altimeter Data

Marine gravity determined from multi-satellite GM/ERM altimeter data over the South China Sea: SCSGA V1.0

2020 ◽  
Vol 94 (5) ◽  
Author(s):  
Chengcheng Zhu ◽  
Jinyun Guo ◽  
Jinyao Gao ◽  
Xin Liu ◽  
Cheinway Hwang ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
Altimeter Data ◽  
The South ◽  
China Sea ◽  
Marine Gravity

scholarly journals Sediment thickness in the Bay of Bengal and Andaman Sea compared with topography and geophysical settings by GMT

2020 ◽  
Vol 22 (1) ◽  
pp. 13-21
Author(s):  
Polina Lemenkova
Keyword(s):  
Bay Of Bengal ◽  
3D Model ◽  
River Mouth ◽  
Gravity Anomalies ◽  
Andaman Sea ◽  
Sediment Thickness ◽  
High Resolution Data ◽  
Bengal Fan ◽  
Marine Gravity ◽  
Ocean Sediment

Abstract The study presents an analysis of the sediment thickness compared with bathymetric and geophysical settings in the Bay of Bengal and Andaman Sea, Indian Ocean. It uses a combination of the high-resolution data: topographic GEBCO, satellite and marine gravity anomalies, EGM2008 geoid and GlobSed to visualize the correlation between relief, gravity and trends in continent-ocean sediment transport. The results include thematic maps and 3D model showing increased sediment thickness in the Bengal Fan (8,0 to 8,2 km) in NE direction with maximum in Ganges Fan (16,2 km), and southward decrease in the Andaman Sea from Irrawaddy river mouth (6-7 km) to the Strait of Malacca (1-2 km). All maps and 3D model have been plotted by Generic Mapping Tools (GMT) cartographic scripting toolset version 6.0.0.

Preliminary marine gravity field from HY-2A/GM altimeter data

2020 ◽  
Vol 39 (7) ◽  
pp. 127-134
Author(s):  
Qiankun Liu ◽  
Ke Xu ◽  
Maofei Jiang ◽  
Jiaming Wang
Keyword(s):  
Gravity Field ◽  
Altimeter Data ◽  
Marine Gravity

scholarly journals Improving accuracy of altimeter-derived marine gravity anomalies in the East Vietnam Sea deep-basin and adjacent area

2019 ◽  
Vol 19 (3B) ◽  
pp. 43-53
Author(s):  
Tran Tuan Dung ◽  
Nguyen Van Sang ◽  
Nguyen Ba Dai ◽  
Nguyen Kim Dung ◽  
Tran Trong Lap ◽  
...  
Keyword(s):  
Collocation Method ◽  
Mean Squared Error ◽  
Gravity Data ◽  
Gravity Anomalies ◽  
Geological Structure ◽  
Altimeter Data ◽  
Adjacent Area ◽  
Deep Basin ◽  
Marine Gravity ◽  
Improving Accuracy

In recent years, the satellite altimeter technology allows enhancing the marine investigation in many areas. Up to now, many scientific studies have attempted to improve the accuracy and resolution of altimeter-derived gravity anomalies and have produced a gravity grid with interval of 1’×1’ for most oceans all over the world. However, these gravity anomalies are not very highly accurate and have a large difference compared to shipboard gravity anomalies, especially in the coastal and islands areas. The purpose of this article is to improve the accuracy of altimeter-derived marine gravity anomalies for geological structure research in the East Vietnam Sea deep-basin and adjacent areas. The least squares collocation method is used to correct the altimeter-derived marine gravity data based on the shipboard gravity data in order to improve the accuracy of marine gravity anomalies. In this article, the altimeter-derived marine gravity anomalies are taken from Sandwell, D. T., et al., (V24.1) and the shipboard gravity anomalies are from the survey projects between Vietnam, Russia and other countries. The mean-squared error when comparing both data is about 9,358 mGal. After correcting by collocation method, the error was reduced to 3,208 mGal (for the altimeter data coinciding with shipboard track). Also, in this article, the achieved results show the efficiency and actuality of the corrected-altimeter-derived marine gravity anomalies for more detailed researches of geological structures. Especially, it is more meaningful in the remote or sparsely surveyed regions.

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