Journal of the Geodetic Society of Japan最新文献

{"title":"Hydrological Effects on Gravity at the Geodynamic Observatory Moxa","authors":"C. Kroner","doi":"10.11366/SOKUCHI1954.47.353","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.353","url":null,"abstract":"","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"47 1","pages":"353-358"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11366/SOKUCHI1954.47.353","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64261830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Data Sets Recorded with the Dual Sphere Superconducting Gravimeter CD 034 at the Geodynamic Observatory Moxa","authors":"C. Kroner, T. Jahr, G. Jentzsch","doi":"10.11366/SOKUCHI1954.47.398","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.398","url":null,"abstract":"Since April 1999 the dual sphere superconducting gravimeter CD 034 is operating at the Geodynamic Observatory Moxa (Germany). A comparison of the period range between 20 s and 2 days shows a high similarity of the two data sets. As expected the upper sensor produces a slightly noisier signal than the lower one. Up to now the difference signal of the two sensors gives no indication for the small arbitrary steps older instruments are susceptible to. Regarding the long-period range we find, after eliminating the barometric pressure influence, a long-term trend in both data sets that can be traced back to hydrological effects. The difference of the time series yields a small linear drift signal of presently unknown physical origin.","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"47 1","pages":"398-403"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64262517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The FEM in the Interpretation of Tilt/Strainmeter Observations in a Cave: Air Pressure Loading Effects.","authors":"G. D. Moro, C. Ebblin, M. Zadro","doi":"10.11366/SOKUCHI1954.47.88","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.88","url":null,"abstract":"","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"47 1","pages":"88-94"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11366/SOKUCHI1954.47.88","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64263473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mission Instruments for Lunar Gravity Measurements using SELENE Sub-satellites.","authors":"T. Iwata, Michio Takahashi, N. Namiki, H. Hanada, N. Kawano, K. Heki, Koji Matsumoto, T. Takano","doi":"10.11366/SOKUCHI1954.47.558","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.558","url":null,"abstract":"","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"47 1","pages":"558-563"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11366/SOKUCHI1954.47.558","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64263551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of the New Tidal Parameters Obtained with a Superconducting Gravimeter at Station Wuhan/China","authors":"Heping Sun, H. Hsu, Jianqiao Xu, Xiaodong Chen, Xing-hua Hao","doi":"10.11366/SOKUCHI1954.47.347","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.347","url":null,"abstract":"The new tidal gravity parameters are determined precisely using 1997-99 registrations obtained with a superconducting gravimeter at station Wuhan/China. The new determinations are in agreement with those obtained using 1985-94 records with exhibit a small instrumental drift and a significant reduction of the site background noise. The atmospheric pressure and oceanic loading signals are removed from the tidal parameters and the free core nutation resonance parameters as of resonant eigenperiod and strength as well as the quality factor are determined. 1. History recall and introduction The Chinese superconducting gravimeter (SG) numbered T004 was installed since November 1985 at the tidal gravity laboratory (30.58•‹N, 114.36•‹E, 34m), Institute of Geodesy and Geophysics, Chinese Academy of Sciences in Wuhan/China. About 10-year continuous gravity data are accumulated except for some short time interruptions. For the purpose in accordance with the global geodynamics project (GGP) regulations (Crossley et al., 1999), the instrument was sent back to the GWR for upgrading in October 1996. The old SG was changed with a new unit sensing and an improved dewar mounting, it was given a new series number C032. It was installed successfully at new site (30.52•‹N, 114.49•‹E, 80 m) in November 1997 about 25 km away from center city. In the replacement of the old data acquisition system, the new one developed by the German group (Jentzsch, personal communication) was installed in November 1997 in connection to the GGP. The records with every 20 s interval are obtained from the original 1 s sampling and sent to a 6.0 digital voltmeter. The continuous data for more than two years are obtained for the purpose of GGP data exchange. This report will introduce the analysis results of the C032 observations in 1997-99 in term of the tidal gravity parameters (amplitude factors and phase lags), and the study for pressure and oceanic gravity signals as well as the determination of the Free Core Nutation (FCN) resonance parameters. * Supported jointly by Nature Science Foundation of China (49774223, 49925411), Chinese Academy of Sciences (KZ952-J1-411, KZCX2-106). 348 He-Ping Sun, Hou-Tze Hsu, Jian-Qiao Xu, Xiao-Dong Chen and Xing-Hua Hao 2. Calibration and Tidal Analysis In order to convert digital output in volt into tidal gravity unit in ƒÊgal, the calibration of the SG using a FG5 absolute gravimeter (AG) was carried out during a period of 3 days starting from at 04:00:00UT, January 29 to at 06:26:20UT, February 1, 1999. After applying for the correction of light speed, valid height and adjustment height, together with the SG output, the AG measurements are used to determine regression coefficient, it is given as of -84.05 ƒÊgal/N with a relative accuracy 0.36%. The tidal gravity and air pressure observations used in this study are for the period from at 19:00 December 20, 1997 to at 23:00 December 31, 1999. The data preprocessing based on the TSOFT (Vauterin, 1998) t","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"47 1","pages":"347-352"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64261525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Focal Processes of Deep Moonquakes.","authors":"H. Araki","doi":"10.11366/SOKUCHI1954.47.508","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.508","url":null,"abstract":"","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"47 1","pages":"508-513"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64262727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"No Clear Evidence for Temporal Variations of Tidal Tilt Prior to the 1999 Izmit and DÜzce Earthquakes in NW-Anatolia","authors":"Malte Westerhausl, J. Zschau","doi":"10.11366/SOKUCHI1954.47.448","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.448","url":null,"abstract":"","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"47 1","pages":"448-455"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64262944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Complex Green's Function for Diurnal/Semidiurnal Loading Problems.","authors":"S. Okubo, D. Tsuji","doi":"10.11366/SOKUCHI1954.47.225","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.225","url":null,"abstract":"","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"98 1","pages":"225-230"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64260171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Installation and First Data Analysis of the Dual Sphere Superconducting Gravimeter at the South African Geodynamic Observatory Sutherland","authors":"J. Neumeyer, E. Brinton, P. Fourie, H. Dittfeld, H. Pflug, B. Ritschel","doi":"10.11366/SOKUCHI1954.47.316","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.316","url":null,"abstract":"In February 2000 the reconstructed Dual Sphere Superconducting Gravimeter (SG) with two gravity sensors has been installed at the newly constructed South African Geodynamic Observatory Sutherland (SAGOS). Additionally meteorological sensors and a ground water table sensor are installed for estimation of gravity changes induced by the atmosphere and hydrosphere. The quality of the site is discussed according to the requirements for a SG site. The difference of the tilt minima for both sensors is adjusted to about 4.5 nmis2. For both gravity sensors the calibration factors have been determined by comparison with a well calibrated LaCoste & Romberg Gravimeter which records to the SG in parallel. With a recently developed low frequency sine and square wave generator based on a PC a step response experiment has been carried out to determine the transfer function and to calculate the instrumental time lag. The station is remote controlled by a \"Multi Media Monitoring Controlling and Information System\" (M3CIS) which operates in real time via Internet. The preliminary short period tidal parameters have been determined for both sensors which are in good agreement. An amplitude spectrum presents the gravity residuals. The single atmospheric pressure admittance is determined for both sensors.","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"47 1","pages":"316-321"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64261550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Environmental Data Acquisition System (EDAS) developed at the Royal Observatory of Belgium","authors":"M. Ruymbeke, F. Beauducel, A. Somerhausen","doi":"10.11366/SOKUCHI1954.47.40","DOIUrl":"https://doi.org/10.11366/SOKUCHI1954.47.40","url":null,"abstract":"Multi-parameters approach is required for the monitoring of complex interactions induced by tectonic activities (volcanic, geothermal and seismic areas, land-slide zones...).The diversity of sensors becomes so broad that the use of existing technology provides a difficult barrier for scientists not familiar with metrology. To address this problem, the Royal Observatory of Belgium develops the Environmental Data Acquisition System EDAS. The core base of this standardised system are the DAS, μDas and nanoDAS monitoring devices. They produce data files which follow a standard sequence containing date, time and the recorded values in ASCII columns. Different type of electronic for instruments with resistive and capacitive transducers were designed. They operate using standard supplies. Their output signals are compatible with the data acquisition system. In complement to the EDAS system, a set of applications has been written for the data analysis, known as EDAT, like HiCum software which is tool useful to analyse signatures on special periodicity’s from graphics obtained with stacking method. The EDAS concept complete tidal probes by improvement of access to various signals susceptible to influence tidal records.","PeriodicalId":39875,"journal":{"name":"Journal of the Geodetic Society of Japan","volume":"47 1","pages":"40-46"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11366/SOKUCHI1954.47.40","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64262227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}