Role of high energy precipitating particles on PMSE echoes during the simultaneous observations carried out by EISCAT VHF and UHF radar

We investigate the role of precipitating energetic particles in producing PMSE echoes during the simultaneous observations conducted simultaneously by both the EISCAT VHF and UHF radars on 8 and 9 Aug 2015. Since PMSE echoes are observed even in the absence of particle precipitation in case of EISCAT VHF observations, precipitating energetic particles might be one possible reason but are not necessary for producing PMSE echoes. However, the absence of PMSE echoes during the precipitating particle precipitation in case of observations carried out simultaneously by EISCAT UHF radar shows that particle precipitation might play an important role in PMSE creation at lower frequencies.