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Ionospheric tomography using GNSS: multiplicative algebraic reconstruction technique applied to the area of Brazil
(2016-10-01)
Experimental analysis was performed using multiplicative algebraic reconstruction technique (MART) to map the ionosphere over Brazil. Code and phase observations from the global navigation satellite system (GNSS) together ...
Possible ionospheric preconditioning by shear flow leading to equatorial spread F
(European Geosciences Union (EGU), 2005-10-14)
Vertical shear in the zonal plasma drift speed is apparent in incoherent and coherent scatter radar observations of the bottomside F region ionosphere made at Jicamarca from about 1600–2200 LT. The relative importance of ...
Comparison between bottomside ionospheric profile parameters retrieved from FORMOSAT3 measurements and ground-based observations collected at Jicamarca
(Elsevier, 2011-03-11)
This study presents the results of a comparison of three ionospheric profile parameters, B0, NmF2, and hmF2, derived from measured ionograms and the FORMOSAT3 radio occultation measurements collected over Jicamarca during ...
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 ...
Comparative study of the equatorial ionosphere over Jicamarca during recent two solar minima
(American Geophysical Union, 2012-01-21)
It is a critical issue that whether or not the extremely deep solar minimum of solar cycle 23/24 brought serious influences on the Earth's space environment. In this study, we collected and manually scaled the ionograms ...
Linear Vary-Chap Topside Electron Density Model with Topside Sounder and Radio-Occultation Data
(2019-03-01)
The Linear Vary-Chap function has received increased attention in describing the topside ionosphere due to its good performance for predicting and extrapolating radio-occultation (RO) electron density ionospheric profiles. ...
Full profile incoherent scatter analysis at Jicamarca
(European Geosciences Union (EGU), 2008-02-04)
Incoherent scatter data from a hybrid longpulse/double-pulse experiment at Jicamarca are analyzed using a full-profile analysis similar to the one implemented by Holt et al. (1992). In this case, plasma density, electron ...
Ionospheric echo detection in digital ionograms using convolutional neural networks
(American Geophysical Union, 2021-08)
An ionogram is a graph of the time that a vertically transmitted wave takes to return to the earth as a function of frequency. Time is typically represented as virtual height, which is the time divided by the speed of ...
Imaging radar observations and nonlocal theory of large-scale plasma waves in the equatorial electrojet
(European Geosciences Union (EGU), 2002)
Large-scale (λ∼1 km) waves in the daytime and nighttime equatorial electrojet are studied using coherent scatter radar data from Jicamarca. Images of plasma irregularities within the main beam of the radar are formed using ...
Electron density profiles in the equatorial E region ionosphere derived from a bistatic coherent scatter radar experiment in Perú
(American Geophysical Union, 2005-01-14)
A new bistatic radar system has been developed at the Jicamarca Radio Observatory. The system is a permanent addition to the facility designed to monitor electron density profiles in the equatorial electrojet region using ...