Radar observations typically employ periodic pulses to study any target. This scheme allows a simple processing of the data but the results frequently shows range or frequency aliasing. In order to solve this problem Uppala and Sahr [1] introduced the aperiodic technique (AT) in the radio science ...

The stratospheric sudden warming peaking in January 2009 was the strongest and most prolonged on record. We report significant ionospheric variations is association with this event, which are especially pronounced at low latitudes. Large increase in the vertical drifts is observed at Jicamarca, ...

The LISN network includes several GPS receivers installed around South America as a distributed observatory with the purpose of study the ionospheric phenomena. All of these receivers send data every 15 minutes to a central server located at Lima – Peru.

The need for high-precision radar measurements of the upper atmosphere has motivated the development of new acquisition systems at the Jicamarca Radio Observatory (JRO). Digital receivers have replaced the old analog receivers, providing higher dynamic range, faster sampling rates, and more flexibility ...

Diapositivas presentadas en una ponencia en la Universidad de Oulu, Finlandia (2009).