Table 1: Geographical and geophysical information of the ionosonde/digisonde stations mentioned in this work.

Station Geographical Latitude Geographical
Longitude
Geomagnetic Latitude Magnetic
Declination
DIP
Angle
La Serena (LS) -29.9° 288.7° -16.5° 0.7° -30.7°
Chillán (CH) -36.6° 288.0° -21.2° 6.8° -37.8°
Tucumán (TU) -26.9° 294.6° -14.9° -5.5° -28.1°
Jicamarca (JI) -12.0° 283.2° 0.2° -1.6° -0.5°