Fig. 2
From: Infrasound detection and altitude estimation associated with the December 22, 2020 Yushu fireball
PMCC results for the data from the infrasound station in Yunnan Province, China. According to the corresponding relationship between the PMCC family and the amplitude of the signal, the received signal can be divided into arrivals A and B, which are marked above. The azimuths and elevation angles (apparent velocity) of arrivals A and B are significantly different. The main frequency band of arrival B is lower than that of arrival A according to the correlation