Table 1.

The main technical indicators of MAI system.

Technical Indicators	Values
System function	Mesospheric/Ionospheric sounding
Working frequency	Mesospheric: 1.98 MHz/ Ionospheric: 2−20 MHz
Sounding range	Mesospheric: 70−100 km/ Ionospheric: 100−800 km
Peak power	Mesospheric: 6 Kw/ Ionospheric: ≤1 Kw
Waveform	Interpulse coding waveform
Duty cycle	5%
Height resolution	1.98 km
Time resolution	Mesospheric: ≤2 min/ Ionospheric: ≤4 min
Sounding mode	Mesospheric: Fixed Frequency/Ionospheric: Frequency sweeping
Sounding Direction	Vertical upward