Detecting Electromagnetic Geographical Environment Changes Based on the Frequency-Intensity Curve

Table 1

Parameters of different detectors.

Type	Detector	Frequency	Data type	Number of point	Step size
DTT	ID 9	0~100 kHz	Electric field	413 in direction	242.72 Hz
	ID 10	0~100 kHz	Magnetic field	413 in direction	242.72 Hz
	ID 7, ID 8	100 kHz~200 kHz	Electric & magnetic field	34	3030.30 Hz
PPY	ID 4~6	200 kHz~10 MHz	High-frequency electric field	461	21304.35 Hz
	ID 1~3	10 MHz~2 GHz^1		461	4326086.96 Hz

¹Although the upper limit of this detector reaches 12 GHz, we set the limit to 2 GHz, since the actual radiation frequency in this region does not exceed this value normally.