Pub Date : 2002-01-01DOI: 10.1556/AGEOD.37.2002.1.6
L. Vermeersen, R. Sabadini, G. Donato
{"title":"Glacially-driven secular rotational variations of the Earth","authors":"L. Vermeersen, R. Sabadini, G. Donato","doi":"10.1556/AGEOD.37.2002.1.6","DOIUrl":"https://doi.org/10.1556/AGEOD.37.2002.1.6","url":null,"abstract":"","PeriodicalId":50900,"journal":{"name":"Acta Geodaetica et Geophysica Hungarica","volume":"42 1","pages":"93-101"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67074756","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}
Pub Date : 2002-01-01DOI: 10.1556/AGEOD.37.2002.2-3.20
T. Gulyaeva
{"title":"Daily assessment of the ionosphere variability","authors":"T. Gulyaeva","doi":"10.1556/AGEOD.37.2002.2-3.20","DOIUrl":"https://doi.org/10.1556/AGEOD.37.2002.2-3.20","url":null,"abstract":"","PeriodicalId":50900,"journal":{"name":"Acta Geodaetica et Geophysica Hungarica","volume":"37 1","pages":"303-308"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67074906","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}
Pub Date : 2002-01-01DOI: 10.1556/AGEOD.37.2002.2-3.15
P. Bencze, P. Bradley
{"title":"Oblique incidence radio-wave propagation and Es structure","authors":"P. Bencze, P. Bradley","doi":"10.1556/AGEOD.37.2002.2-3.15","DOIUrl":"https://doi.org/10.1556/AGEOD.37.2002.2-3.15","url":null,"abstract":"","PeriodicalId":50900,"journal":{"name":"Acta Geodaetica et Geophysica Hungarica","volume":"37 1","pages":"261-270"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67074784","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}
Pub Date : 2002-01-01DOI: 10.1556/AGEOD.37.2002.2-3.6
N. Jakowski, S. Stankov, I. Kutiev
A new formula of the electron density profiles above the peak height is introduced. The formula is based on the Epstein layer and depends on the O and H scale heights and the OH transition level. Both scale heights have a ratio 1:16 reduced by a factor representing the change from magnetic field line direction to vertical direction. The bottom-side part of TEC (calculated by using foF2, M3000F2 and foE measurements) is subtracted from the GPSderived TEC at the same location. The topside TEC, together with the empirically obtained O-H transition level, are then used to deduce the unknown scale heights. The method is demonstrated on actual data covering low and high solar activity conditions.
{"title":"Electron density profiles deduced from GPS TEC, O+-H+transition height and ionosonde data","authors":"N. Jakowski, S. Stankov, I. Kutiev","doi":"10.1556/AGEOD.37.2002.2-3.6","DOIUrl":"https://doi.org/10.1556/AGEOD.37.2002.2-3.6","url":null,"abstract":"A new formula of the electron density profiles above the peak height is introduced. The formula is based on the Epstein layer and depends on the O and H scale heights and the OH transition level. Both scale heights have a ratio 1:16 reduced by a factor representing the change from magnetic field line direction to vertical direction. The bottom-side part of TEC (calculated by using foF2, M3000F2 and foE measurements) is subtracted from the GPSderived TEC at the same location. The topside TEC, together with the empirically obtained O-H transition level, are then used to deduce the unknown scale heights. The method is demonstrated on actual data covering low and high solar activity conditions.","PeriodicalId":50900,"journal":{"name":"Acta Geodaetica et Geophysica Hungarica","volume":"37 1","pages":"171-181"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67074989","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}
Pub Date : 2001-10-01DOI: 10.1556/AGEOD.36.2001.3.5
S. Szalai, M. A. Alla, S. Ahmed
In this paper we provide a field example for the determination of the location and direction of fissures in narrow, elongated measuring areas. The test measurements were carried out on the Mokattam plateau at Cairo (Egypt). Direction, length of the layout and the profile length all were very limited, since the measurements had to be carried out within a narrow (2-10 m wide) stripe, between a built-in area and a cleft rim. Interpretation of field measurements was supported by (1) analogue model experiments, and (2) parameter sensitivity maps. As it was found from laboratory experiments, fissures are indicated by potential-difference maximums along profiles measured by using three-electrode array (if the reference point is between the potential electrodes). The mean distance between two neighbouring maximums throughout the whole profile was found to be about 3-4 m, corresponding to the distance between the most visible fissures on the cleft wall. The Schlumberger null-array has been found to be an appropria...
{"title":"Localisation and direction determination of fissures with geoelectric methods in narrow, elongated measuring areas","authors":"S. Szalai, M. A. Alla, S. Ahmed","doi":"10.1556/AGEOD.36.2001.3.5","DOIUrl":"https://doi.org/10.1556/AGEOD.36.2001.3.5","url":null,"abstract":"In this paper we provide a field example for the determination of the location and direction of fissures in narrow, elongated measuring areas. The test measurements were carried out on the Mokattam plateau at Cairo (Egypt). Direction, length of the layout and the profile length all were very limited, since the measurements had to be carried out within a narrow (2-10 m wide) stripe, between a built-in area and a cleft rim. Interpretation of field measurements was supported by (1) analogue model experiments, and (2) parameter sensitivity maps. As it was found from laboratory experiments, fissures are indicated by potential-difference maximums along profiles measured by using three-electrode array (if the reference point is between the potential electrodes). The mean distance between two neighbouring maximums throughout the whole profile was found to be about 3-4 m, corresponding to the distance between the most visible fissures on the cleft wall. The Schlumberger null-array has been found to be an appropria...","PeriodicalId":50900,"journal":{"name":"Acta Geodaetica et Geophysica Hungarica","volume":"36 1","pages":"285-296"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67074583","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}
Pub Date : 2001-01-01DOI: 10.1556/AGEOD.36.2001.1.4
J. Somogyi, L. Battha
{"title":"Robust algorithms for relative orientation","authors":"J. Somogyi, L. Battha","doi":"10.1556/AGEOD.36.2001.1.4","DOIUrl":"https://doi.org/10.1556/AGEOD.36.2001.1.4","url":null,"abstract":"","PeriodicalId":50900,"journal":{"name":"Acta Geodaetica et Geophysica Hungarica","volume":"36 1","pages":"35-38"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67074460","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}
Pub Date : 2001-01-01DOI: 10.1556/AGEOD.36.2001.1.5
F. Steiner, B. Hajagos
{"title":"Parent distribution type-domain of the applicability of the sample standard deviation tocharacterize the dispersion of the data in a sample","authors":"F. Steiner, B. Hajagos","doi":"10.1556/AGEOD.36.2001.1.5","DOIUrl":"https://doi.org/10.1556/AGEOD.36.2001.1.5","url":null,"abstract":"","PeriodicalId":50900,"journal":{"name":"Acta Geodaetica et Geophysica Hungarica","volume":"36 1","pages":"39-54"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67074470","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}
Pub Date : 2001-01-01DOI: 10.1556/AGEOD.36.2001.1.1
F. Ruiz, A. Introcaso
{"title":"Geophysical evidences of crustal ancient junction in Desaguadero-Bermejo megafault (San Juan-La Rioja province, Argentina)","authors":"F. Ruiz, A. Introcaso","doi":"10.1556/AGEOD.36.2001.1.1","DOIUrl":"https://doi.org/10.1556/AGEOD.36.2001.1.1","url":null,"abstract":"","PeriodicalId":50900,"journal":{"name":"Acta Geodaetica et Geophysica Hungarica","volume":"14 1","pages":"1-16"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67074398","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}
Pub Date : 2001-01-01DOI: 10.1556/AGEOD.36.2001.1.3
S. Molodensky, E. Groten
{"title":"On the comparison of different approaches to atmospheric effects in the theory of nutations and precession (A remark)","authors":"S. Molodensky, E. Groten","doi":"10.1556/AGEOD.36.2001.1.3","DOIUrl":"https://doi.org/10.1556/AGEOD.36.2001.1.3","url":null,"abstract":"","PeriodicalId":50900,"journal":{"name":"Acta Geodaetica et Geophysica Hungarica","volume":"36 1","pages":"31-34"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67074448","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}
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