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Contribution to the Establishment of the IHRF in the State of São Paulo
(2022-01-01)
This letter describes a practical computation to determine the potential values, following the International Association of Geodesy (IAG) recommendations, at Presidente Prudente (PPTE) and Cananeia (NEIA) stations, which ...
Goce derived geoid changes before the Pisagua 2014 earthquake
(Elsevier, 2018-01)
The analysis of space – time surface deformation during earthquakes reveals the variable state of stress that occurs at deep crustal levels, and this information can be used to better understand the seismic cycle. Understanding ...
Avaliação de modelos geoidais gravimétricos determinados com funções covariâncias planas e esféricas (Estudo de Caso: Estado de São Paulo e adjacências)
(UNIV FEDERAL PARANA, CENTRO POLITECNICO, 2008)
The least squares collocation is a mathematical technique which is used in Geodesy for representation of the Earth's anomalous gravity field from heterogeneous data in type and precision. The use of this technique in the ...
Numerical simulations to assess ART and MART performance for ionospheric tomography of chapman profiles
(2017-07-01)
The incomplete geometrical coverage of the Global Navigation Satellite System (GNSS) makes the ionospheric tomographic system an ill-conditioned problem for ionospheric imaging. In order to detect the principal limitations ...
Improving the GNSS positioning stochastic model in the presence of ionospheric scintillation
(Springer, 2009-10-01)
Ionospheric scintillations are caused by time-varying electron density irregularities in the ionosphere, occurring more often at equatorial and high latitudes. This paper focuses exclusively on experiments undertaken in ...
Geodesia física
(Instituto de Fisiografía y Geología, 2008)
Holocene shortening rates of an Andean-front thrust, Southern Precordillera, Argentina
(Elsevier, 2015-09)
A significant part of the Quaternary shortening between the Chilean trench and the relative stable interior of the South American plate at the Pampean flat slab (27–33°S), has been accommodated at the eastern foothills of ...
A New Method for Ionospheric Tomography and Its Assessment by Ionosonde Electron Density, GPS TEC, and Single-Frequency PPP
(Ieee-inst Electrical Electronics Engineers Inc, 2019-05-01)
A new tomographic method was developed with the main goal of mapping the ionosphere in the region of Brazil. The ionospheric background was estimated based on ionosonde and radio-occultation measurements to overcome the ...
Tomographic imaging of ionospheric plasma bubbles based on GNSS and radio occultation measurements
(2018-10-01)
Total electron content measurements given by the global navigation satellite system (GNSS) have successfully presented results to capture the signatures of equatorial plasma bubbles. In contrast, the correct reproduction ...
Paleoseismic Evidence of an Mw 7 Pre-Hispanic Earthquake in the Peruvian Forearc
(American Geophysical UnionUS, 2021-06)
We present the results of a paleoseismic survey of the Incapuquio Fault System, a prominent transpressional fault system cutting the forearc of South Perú. High-resolution Digital Elevation Models, optical satellite imagery, ...