Raw CADI Ionosonde Data From Pontianak and Kupang Stations During the 1 January 2025 Geomagnetic Storm

This dataset contains raw ionosonde observations acquired by the Canadian Advanced Digital Ionosonde (CADI) systems at the Pontianak and Kupang stations, Indonesia, during the 1 January 2025 geomagnetic storm. The data are provided in the original instrument format (*.md4) and contain ionograms recorded at regular observation intervals. These observations were used to derive ionospheric parameters, including the virtual height of the F layer (h′F), and to identify spread-F signatures associated with equatorial plasma bubbles (EPBs). The dataset supports investigations of storm-time ionospheric dynamics, F-layer uplift, and equatorial plasma irregularities over the Indonesian sector.