This paper analyzed GPS data from the Topo-Iberia network spanning almost 12 years(2008-2020).The data quality information for all 26 Topo-Iberia stations is provided for the first time,complementing the Spanish Geolo...This paper analyzed GPS data from the Topo-Iberia network spanning almost 12 years(2008-2020).The data quality information for all 26 Topo-Iberia stations is provided for the first time,complementing the Spanish Geological Survey’s storage work.Data analyses based on quality indicators obtained using TEQC have been carried out.The guidelines and data quality information from the IGS stations have been considered as the quality references,with the stations ALJI,EPCU,and TIOU standing out as the worst stations,while on the contrary,FUEN,PALM,PILA,and TRIA meet the quality requirements to become an IGS station.The relationship between the GPS data quality and their GAMIT-and Gipsy X-derived postfit ionosphere-free phase residuals has also been investigated,and the results reveal an inversely proportional relationship.It has been found that the stations showing an increase in elevation of the horizon line,also show an increase in cycle slips and multipath,are among the poorest quality stations,and among those with the highest postfit RMS of phase residuals.Moreover,the evolution of the vegetation around the antenna should be considered as it could cause a progressive loss of quality,which is not complying with the IGS standards.The quality assessment shows that the Topo-Iberia stations are appropriate for geodetic purposes,but permanent monitoring would be necessary to avoid the least possible loss of data and quality.In addition,a method to characterize the GNSS data quality is proposed.展开更多
Based on Continuous GPS （CGPS） observation data of the Crustal Movement Observation Network of China （CMONOC） and the Sichuan Continuous Operational Reference System （ SCCORS）, we calculated the horizontal cosei...Based on Continuous GPS （CGPS） observation data of the Crustal Movement Observation Network of China （CMONOC） and the Sichuan Continuous Operational Reference System （ SCCORS）, we calculated the horizontal coseismic displacements of CGPS sites caused by the 2013 Lushan Mw 6.6 earthquake. The resuits indicate that the horizontal coseismic deformations of CGPS stations are consistent with thrust-compression rupture. Furthermore, the sites closest to the epicenter underwent significant coseismic displacements. Three network stations exhibited displacements greater than 9 mm （ the largest is 20.9 mm at SCTQ） , while the others were displaced approximately 1 -4 mm.展开更多
回顾了改革开放初期,经国家教育部批准的中美化学研究生项目的由来和实施情况。该项目是由美国科学院院士,著名有机化学家,哈佛大学终身教授多林(William von E.Doering)创导和联系的,由复旦大学负责具体组织工作。该项目的实施对中国...回顾了改革开放初期,经国家教育部批准的中美化学研究生项目的由来和实施情况。该项目是由美国科学院院士,著名有机化学家,哈佛大学终身教授多林(William von E.Doering)创导和联系的,由复旦大学负责具体组织工作。该项目的实施对中国化学学科的发展和人才培养产生了深远的影响。展开更多
基金supported in part by the University of Jaén and the Spanish Ministry of Economy, Industry and Competitiveness (PTA2015-11507-I MINECO)。
文摘This paper analyzed GPS data from the Topo-Iberia network spanning almost 12 years(2008-2020).The data quality information for all 26 Topo-Iberia stations is provided for the first time,complementing the Spanish Geological Survey’s storage work.Data analyses based on quality indicators obtained using TEQC have been carried out.The guidelines and data quality information from the IGS stations have been considered as the quality references,with the stations ALJI,EPCU,and TIOU standing out as the worst stations,while on the contrary,FUEN,PALM,PILA,and TRIA meet the quality requirements to become an IGS station.The relationship between the GPS data quality and their GAMIT-and Gipsy X-derived postfit ionosphere-free phase residuals has also been investigated,and the results reveal an inversely proportional relationship.It has been found that the stations showing an increase in elevation of the horizon line,also show an increase in cycle slips and multipath,are among the poorest quality stations,and among those with the highest postfit RMS of phase residuals.Moreover,the evolution of the vegetation around the antenna should be considered as it could cause a progressive loss of quality,which is not complying with the IGS standards.The quality assessment shows that the Topo-Iberia stations are appropriate for geodetic purposes,but permanent monitoring would be necessary to avoid the least possible loss of data and quality.In addition,a method to characterize the GNSS data quality is proposed.
基金supported by National Natural Science Foundation of China(41074016)
文摘Based on Continuous GPS （CGPS） observation data of the Crustal Movement Observation Network of China （CMONOC） and the Sichuan Continuous Operational Reference System （ SCCORS）, we calculated the horizontal coseismic displacements of CGPS sites caused by the 2013 Lushan Mw 6.6 earthquake. The resuits indicate that the horizontal coseismic deformations of CGPS stations are consistent with thrust-compression rupture. Furthermore, the sites closest to the epicenter underwent significant coseismic displacements. Three network stations exhibited displacements greater than 9 mm （ the largest is 20.9 mm at SCTQ） , while the others were displaced approximately 1 -4 mm.
