Diapositivas presentadas en el XIII Encuentro Científico Internacional, (ECI 2010v), realizado del 5 al 8 de enero de 2010 en la ciudad de Lima.

Several instruments utilized under different operation modes at the Jicamarca Radio Observatory (JRO) have allowed the study of the equatorial atmosphere and ionosphere for many years. Among others we have: the Incoherent Scatter Radar (ISR), the Jicamarca Bistatic Radar (JBR), Magnetometer, Ionosonda and JULIA radar. All instruments generate a huge amount of information, either raw or derived data. Each operation mode has its own database and it can be freely accessed through the Internet by their respective link at: http://jro.igp.gob.pe/database/; the search options, graphics and visualization are different depending on the experiment. JRO is under a process of data server upgrading, both software and hardware. This includes the unification of existing databases in Jicamarca, improving the search tools, access and visualization. The first stage of this process involves the transfer of...

Inverse methods involving compressive sensing are tested in the application of two-dimensional aperture-synthesis imaging of radar backscatter from field-aligned plasma density irregularities in the ionosphere. We consider basis pursuit denoising, implemented with the fast iterative shrinkage thresholding algorithm, and orthogonal matching pursuit (OMP) with a wavelet basis in the evaluation. These methods are compared with two more conventional optimization methods rooted in entropy maximization (MaxENT) and adaptive beamforming (linearly constrained minimum variance or often “Capon's Method.”) Synthetic data corresponding to an extended ionospheric radar target are considered. We find that MaxENT outperforms the other methods in terms of its ability to recover imagery of an extended target with broad dynamic range. Fast iterative shrinkage thresholding algorithm performs reasonably...

Poster presented at the 2020 CEDAR Virtual Meeting, June 22-26.