Table 1. Main specifications of the Wi-Fi system with tethered balloon.

Components of the system Specification
Helium balloon Diameter(mm) 4200
Volume(m3) 38
Weight(kg) 13
Maximum payload(kg) 42
Material Teflon polyurethane
Wi-Fi CPE Output power(mW) 200
Transmission distance(km) 1
Operating current(mA) 500
Weight(kg) 0.15
Bandwidth(GHz) 5.8
Beam angle(deg) azimuth : 60, vertical : 60
Size(mm) 160 × 95 × 29
IP rating 65
GNSS module Receiver type Multi-band GNSS receiver
Input voltage(V) 2.7 to 3.6
Operating current(mA) 68
Velocity accuracy(m/s) 0.05
Horizontal position accuracy(m) RTK : 0.01
Vertical position accuracy(m) RTK : 0.01
IMU Model WT901C
Input voltage(V) 5 to 36
Operating current(mA) 6.7
Angle range(°) X, Z: ±180, Y: ±90
Angle accuracy(°) X, Y: 0.05, Z: 1