Acta Geophysica最新文献_第10页

Accurate Establishment of Error Models for the Satellite Gravity Gradiometry Recovery and Requirements Analysis for the Future GOCE Follow-On Mission 卫星重力梯度恢复误差模型的精确建立及未来GOCE后续任务需求分析

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0019

Wei Zheng, Zhaokui Wang, Yanwei Ding, Zhaowei Li

{"title":"Accurate Establishment of Error Models for the Satellite Gravity Gradiometry Recovery and Requirements Analysis for the Future GOCE Follow-On Mission","authors":"Wei Zheng, Zhaokui Wang, Yanwei Ding, Zhaowei Li","doi":"10.1515/acgeo-2016-0019","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0019","url":null,"abstract":"Firstly, the new single and combined error models applied to estimate the cumulative geoid height error are efficiently produced by the dominating error sources consisting of the gravity gradient of the satellite-equipped gradiometer and the orbital position of the space-borne GPS/GLONASS receiver using the power spectral principle. At degree 250, the cumulative geoid height error is 1.769 × 10−1 m based on the new combined error model, which preferably accords with a recovery accuracy of 1.760 ×10−1 m from the GOCE-only Earth gravity field model GO_CONS_GCF_2_TIM_R2 released in Germany. Therefore, the new combined error model of the cumulative geoid height is correct and reliable in this study. Secondly, the requirements analysis for the future GOCE Follow-On satellite system is carried out in respect of the preferred design of the matching measurement accuracy of key payloads comprising the gravity gradient and orbital position and the optimal selection of the orbital altitude of the satellite. We recommend the gravity gradient with an accuracy of 10−13−10−15 /s2, the orbital position with a precision of 1-0.1 cm and the orbital altitude of 200-250 km in the future GOCE Follow-On mission.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67087879","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

Anomalous Variations of Ionosphere Associated with the Strong Earthquake at Pakistan-Iran Border at a Low Latitude Station Agra, India 印度阿格拉低纬度站与巴基斯坦-伊朗边界强地震相关的电离层异常变化

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0020

D. Pundhir, Birbal Singh, O. P. Singh, S. Gupta

引用次数: 6

Variation of Wave Velocity and Porosity of Sandstone after High Temperature Heating 高温加热后砂岩波速与孔隙度的变化

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0021

Qiang Sun, Weiqiang Zhang, T. Su, Shu-yun Zhu

引用次数: 43

Present-day Horizontal Mobility in the Serbian Part of the Pannonian Basin; Inferences from the Geometric Analysis of Deformations 潘诺尼亚盆地塞尔维亚部分现今的水平流动性变形几何分析的推论

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0074

Z. Sušić, M. Toljić, V. Bulatović, T. Ninkov, U. Stojadinovic

引用次数: 4

Chaotic Behavior of Soil Radon Gas and Applications 土壤氡气的混沌行为及其应用

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0077

M. Kamislioglu, F. Külahcı

引用次数: 16

Magnetic and Electromagnetic Signatures around Polile Tshisa Hot Spring in the Northern Neotectonic Belt in the Eastern Cape Province, South Africa 南非东开普省北部新构造带Polile Tshisa温泉的磁、电磁特征

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0001

K. Madi, Peter K. Nyabeze, O. Gwavava, M. Sekiba, Baojin Zhao

引用次数: 2

Application of Multivariate Statistical Techniques for Characterization of Groundwater Quality in the Coastal Aquifer of Nador, Tipaza (Algeria) 多元统计技术在阿尔及利亚蒂帕扎纳多尔沿海含水层地下水水质表征中的应用

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0027

A. Bouderbala, B. Remini, A. Saaed Hamoudi, A. Pulido-Bosch

引用次数: 14

A Preliminary Study On the Electrical Signatures of Some Iron and Stony Meteorites and Their Dependence On Nickel Content 一些铁和石质陨石的电特征及其与镍含量关系的初步研究

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0055

B. Nabawy, P. Rochette

{"title":"A Preliminary Study On the Electrical Signatures of Some Iron and Stony Meteorites and Their Dependence On Nickel Content","authors":"B. Nabawy, P. Rochette","doi":"10.1515/acgeo-2016-0055","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0055","url":null,"abstract":"The present study is considered as an exploratory study of electrical properties of meteorites at variable current frequencies, called the electrical signature. The electric resistivity has been measured at different frequencies, varying between 1 and 100 KHz for some iron meteorites (Mundrabilla and Gibeon meteorites), stony meteorite samples (NWA 869, NWA 7629 and Ghubara) and Fe-Ni alloys, of known Ni concentration, which have been prepared and used as standards to be compared with the studied meteorites. In addition, SEM studies supported by EDX technique have been applied. The SEM and EDX displays enabled us to obtain the chemical composition and internal structural fabrics of the studied samples. Porosity and density (bulk and grain densities) have also been measured for both types of meteorites. Porosity values of the studied meteorites are very low (∅ ≤ 3%) and correspond to micro vugs and cracks. The grain density of non-weathered samples varies from 3.48 g/cm3 for the stony meteorites to 7.91 g/cm3 for the iron meteorites. The obtained electrical signatures are diagnostic for each type and can be used to detect quantitatively the concentration of Ni. The electrical signature of stony meteorites is much simpler than that of iron meteorites, and simpler signatures have been obtained at higher Ni concentrations.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0055","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67089899","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: 10

Electromagnetic Radiation Generated by Acoustic Excitation of Rock Samples 岩石样品声激励产生的电磁辐射

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-02 DOI: 10.1515/acgeo-2016-0081

Lyudmila V. Yavorovich, A. Bespalko, P. Fedotov, R. Baksht

引用次数: 11

Enhancement of Seismic Data Processing and Interpretation of Fracture Zones on the Upper Part of Granitic Basement in Cuu Long Basin, Vietnam 越南龟龙盆地花岗岩基底上部断裂带地震资料处理与解释的改进

IF 2.3 4区地球科学

Acta Geophysica Pub Date : 2016-12-01 DOI: 10.1515/acgeo-2016-0082

M. T. Tân, M. Ha, K. Marfurt, Nguyen Trung Hieu, Nguyen Thi My Hanh

{"title":"Enhancement of Seismic Data Processing and Interpretation of Fracture Zones on the Upper Part of Granitic Basement in Cuu Long Basin, Vietnam","authors":"M. T. Tân, M. Ha, K. Marfurt, Nguyen Trung Hieu, Nguyen Thi My Hanh","doi":"10.1515/acgeo-2016-0082","DOIUrl":"https://doi.org/10.1515/acgeo-2016-0082","url":null,"abstract":"The fractured granite basement is the primary oil and gas reservoir in the Cuu Long Basin, Vietnam. Due to the complexity of this nonlayered unconventional target, combined with complicated fault and fracture systems, the seismic data quality near and within the basement section is very low. For this reason, it is important to apply improved seismic data processing workflows, filtering and migration techniques, as wells as attribute processing methods to enhance the imaging quality.Our studies show that applying different types of filters, including the f-k, Radon transform and Tau-P, improves signal to noise ratio, removing multiples, revealing basement’s top and its related fractured and fault zones. In addition, the application of multi-arrival-solution migration algorithms, such as Kirchhoff Migration and Controlled Beam Migration, provides improved imaging for identifying basement top and faults and fractures within the basement. Furthermore, the application of seismic attributes such as curvature, apparent dip, or energy gradient, is important in locating faults and fractures, whereas mapping of intensity and orientation of such structures assists the delineation of “sweet spots” and assists the planning of exploration.","PeriodicalId":50898,"journal":{"name":"Acta Geophysica","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acgeo-2016-0082","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67091534","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: 7