A Comparative Study of Ground-Based and Drone-Based GPR: Opportunities, Challenges, and Applications in Bromo, IndonesiaAfni Nur Jannah, Eksi Galih Kenya Paramita, Syabibah Zakiyya Zukhrufah, Juan Pandu Gya Nur Rochman and Firmansyah Maulana AzhaliBIO Web Conf., 157 (2025) 05004DOI: https://doi.org/10.1051/bioconf/202515705004