DroneScale: drone load estimation via remote passive RF sensing. - Phuc Nguyen 002; Vimal Kakaraparthi; Nam Bui; Nikshep Umamahesh; Nhat Pham; Hoang Truong 002; Yeswanth Guddeti; Dinesh Bharadia; Richard Han 001; Eric W. Frew; Daniel Massey; Tam Vu 001 (SenSys, 2020)