Acta Geodaetica et Geophysica最新文献_第5页

Using real GNSS data for ionospheric disturbance remote sensing associated with strong thunderstorm over Wuhan city 利用真实的全球导航卫星系统数据进行与武汉市上空强雷暴有关的电离层扰动遥感

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-10-04 DOI: 10.1007/s40328-023-00423-w

Mohamed Freeshah, Nahed Osama, Xiaohong Zhang

{"title":"Using real GNSS data for ionospheric disturbance remote sensing associated with strong thunderstorm over Wuhan city","authors":"Mohamed Freeshah, Nahed Osama, Xiaohong Zhang","doi":"10.1007/s40328-023-00423-w","DOIUrl":"10.1007/s40328-023-00423-w","url":null,"abstract":"<div><p>Acoustic-gravity waves (AGWs) generated in the lower atmosphere can cause the ionosphere’s ionized plasma. Therefore, the electromagnetic signals transmitted from the navigation and communication satellites can be distorted based on AGWs propagating to upper atmosphere height and then disturbing the ionosphere. In this work, total electron content (TEC) was derived from dense Hubei continuously operating reference stations (HBCORS) to detect the potential ionospheric disturbance associated with a severe thunderstorm that hit Wuhan city on March 2, 2018. TEC values were examined under meticulous observation for the space weather indices. Furthermore, a de-trending algorithm, the so-called numerical divergence by multiple intervals, was applied to TEC sequences to detect the ionospheric disturbance due to the event. The slant TEC (STEC) variations near the thunderstorm area had a higher amplitude content than those that were away from it. The STEC deviations (dTEC) have been compared with a non-lighting day. Our findings indicated that the dTEC was insignificant compared with the day of the event. Afterwards, regional ionosphere maps (RIMs) were modeled through the HBCORS data around Hubei province. RIMs were employed to analyze the vertical TEC (VTEC) response to the thunderstorm. VTEC responses were detected by a proposed de-trend method so-called differences from the average value. The ionosphere showed a positive response up to 2 TECU, especially in the northern part of Hubei province where the maximum VTEC amplitude variations coincided with the thunderstorm influence. The findings are tentatively interpreted by lightning-induced electric fields and AGWs.</p></div>","PeriodicalId":48965,"journal":{"name":"Acta Geodaetica et Geophysica","volume":"58 4","pages":"553 - 574"},"PeriodicalIF":1.4,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135590771","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

Examining landslides by different geodetic deformation models: a case study on Esiroğlu-Işıklar location, Trabzon, Turkey 用不同的大地测量变形模型检查滑坡:以土耳其特拉布宗Esiroğlu-Işıklar地点为例

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-09-01 DOI: 10.1007/s40328-023-00420-z

F. Kadi, Faruk Yildirim

引用次数: 0

PL-geoid2021: A quasigeoid model for Poland developed using geophysical gravity data inversion technique PL-geoid2021:利用地球物理重力数据反演技术开发的波兰准类地面模型

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-08-30 DOI: 10.1007/s40328-023-00422-x

M. Trojanowicz, M. Owczarek-Wesołowska

引用次数: 0

Identification of potential seismic damage in Tanah Patah area, Bengkulu City, Indonesia 印尼明古鲁市Tanah Patah地区潜在地震破坏的识别

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-08-29 DOI: 10.1007/s40328-023-00419-6

L. Z. Mase

引用次数: 0

Ultrasonic P-wave to ascertain the mean grain diameter of D’Euville limestone 超声纵波法测定德维尔石灰岩平均粒径

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-08-16 DOI: 10.1007/s40328-023-00421-y

Guangxi Li, Xiang Li, Yuchao Wang

引用次数: 0

Gravity field modelling in mountainous areas by solving the nonlinear satellite-fixed geodetic boundary value problem with the finite element method 用有限元法求解非线性卫星定边值问题建立山区重力场模型

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-08-16 DOI: 10.1007/s40328-023-00418-7

M. Macák, Z. Minarechová, R. Cunderlík, K. Mikula

引用次数: 0

Geoid model determination for the Hellenic area “Hellas Geoid 2023” 希腊地区“Hellas Geoid 2023”的大地水准面模型确定

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-07-25 DOI: 10.1007/s40328-023-00416-9

Melissinos Paraskevas, N. Papadopoulos, D. Ampatzidis

引用次数: 1

Geodetic observations confirming land subsidence of Bandung Basin, Indonesia, and subsequent building damage 大地测量观测证实印度尼西亚万隆盆地的地面沉降和随后的建筑物损坏

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-07-10 DOI: 10.1007/s40328-023-00417-8

I. Gumilar, T. P. Sidiq, R. Virtriana, G. Pambudi, B. Bramanto, H. Abidin

引用次数: 0

Parameters of the best fitting lunar ellipsoid based on GRAIL’s selenoid model 基于GRAIL曲面模型的最佳拟合月球椭球体参数

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-06-27 DOI: 10.1007/s40328-023-00415-w

Kamilla Cziráki, Gábor Timár

{"title":"Parameters of the best fitting lunar ellipsoid based on GRAIL’s selenoid model","authors":"Kamilla Cziráki, Gábor Timár","doi":"10.1007/s40328-023-00415-w","DOIUrl":"10.1007/s40328-023-00415-w","url":null,"abstract":"<div><p>Since the Moon is less flattened than the Earth, most lunar GIS applications use a spherical datum. However, with the renaissance of lunar missions, it seems worthwhile to define an ellipsoid of revolution that better fits the selenoid. The main long-term benefit of this might be to make the lunar adaptation of methods already implemented in terrestrial GNSS and gravimetry easier and somewhat more accurate. In our work, we used the GRGM 1200A Lunar Geoid (Goossens et al. in A global degree and order 1200 model of the lunar gravity field using GRAIL mission data. In: Lunar and planetary science conference, Houston, TX, Abstract #1484, 2016; Lemoine et al. in Geophys Res Lett 41:3382–3389. http://dx.doi.org/10.1002/2014GL060027, 2014), a 660th degree and order potential surface, developed in the frame of the GRAIL project. Samples were taken from the potential surface along a mesh that represents equal area pieces of the surface, using a Fibonacci sphere. We tried Fibonacci spheres with several numbers of points and also separately examined the effect of rotating the network for a given number of points on the estimated parameters. We estimated the best-fitting rotation ellipsoid’s semi-major axis and flatness data by minimizing the selenoid undulation values at the network points, which were obtained for a = 1,737,576.6 m and f = 0.000305. This parameter pair is already obtained for a 10,000 point grid, while the case of reducing the points of the mesh to 3000 does not cause a deviation in the axis data of more than 10 cm. As expected, the absolute value of the selenoid undulations have decreased compared to the values taken with respect to the spherical basal surface, but significant extreme values still remained as well.</p></div>","PeriodicalId":48965,"journal":{"name":"Acta Geodaetica et Geophysica","volume":"58 2","pages":"139 - 147"},"PeriodicalIF":1.4,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40328-023-00415-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5047866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An elevation mask modeling method based on azimuth rounding for monitoring building deformation 基于方位角舍入的建筑变形监测高程掩模建模方法

IF 1.4 4区地球科学

Acta Geodaetica et Geophysica Pub Date : 2023-06-27 DOI: 10.1007/s40328-023-00413-y

Han Junqiang, Tu Rui, Lu Xiaochun, Xiao Xia, Zhang Rui, Fan Lihong, Zhang Pengfei, Wang Siyao

{"title":"An elevation mask modeling method based on azimuth rounding for monitoring building deformation","authors":"Han Junqiang, Tu Rui, Lu Xiaochun, Xiao Xia, Zhang Rui, Fan Lihong, Zhang Pengfei, Wang Siyao","doi":"10.1007/s40328-023-00413-y","DOIUrl":"10.1007/s40328-023-00413-y","url":null,"abstract":"<div><p>With the rapid growth of the construction industry, precise and efficient monitoring of building deformation has become a crucial factor in ensuring their secure construction and stable operation. The frequent occurrence of occlusion and diffraction errors in satellite signals caused by high-rise buildings has emerged as a primary challenge that constrains the accuracy of positioning in deformation monitoring by BeiDou Navigation Satellite (BDS). To solve the problems, this study proposes an elevation mask angle modeling method of satellite signal occlusion based on azimuth rounding and applies it to real-time BDS building deformation monitoring and positioning algorithm. The proposed approach involves defining a particular subset of integer azimuth and elevation angles, followed by utilizing the minimum elevation angle from this subset to develop a model for the azimuth-dependent elevation mask angle. We aimed to develop an elevation angle mask model using a conventional approach, and the model can be utilized to focus on non-line-of-sight (NLOS) and multipath signals and attenuate their impact on positioning accuracy by reducing their weight. The experimental results show that the elevation angle mask model can be easily completed by using the observation data of BDS satellites in a single day, and its use can make the number of effective satellites involved in the calculation of real-time deformation monitoring of BDS more accurate and reliable. The root mean square (RMS) of positioning results including float solutions was increased respectively by 91.1%, 93.3%, and 72.7% in the direction of East-North-Up (ENU), and the RMS of results with fixed ambiguity was increased by 6.9%, 10.0%, and 29.5%, respectively. Therefore, it can be concluded that the elevation mask angle modeling algorithm is convenient to realize and can significantly improve the performance of deformation monitoring results by BDS.</p></div>","PeriodicalId":48965,"journal":{"name":"Acta Geodaetica et Geophysica","volume":"58 2","pages":"273 - 283"},"PeriodicalIF":1.4,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5047883","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