At the end of August 2007 an Advanced Ionospheric Sounder (AIS), built at the Istituto Nazionale
di Geofisica e Vulcanologia (INGV), Rome, Italy, was installed at San Miguel de Tucumán,
Argentina (geographical coordinates: 26.9 S, 294.6 E; magnetic coordinates: 15.5 S, 3.8 E),
particularly interesting for its location, near the southern peak of the equatorial anomaly.
AIS-INGV is a digital low-power pulse-compressed ionosonde. In order to reduce the transmitted
power, weight, size, power consumption, and to have an excellent reliability, advanced HF-radar
techniques were employed.