PMSE definition
Examples of PMSE in a sentence
Sufficient observational data are needed to confirm or deny theories about the origin of PMSE.
One of the most surprising results obtained by EISCAT are the observations of Polar Mesospheric Summer Echoes (PMSE) occurring in the altitude region between 80 and 90 km during summer time.
Particular emphasis has been placed on the observations of Polar Cap Absorption events (PCA) and Polar Mesosphere Summer Echoes (PMSE).
The EISCAT Svalbard Radar has been used to investigate the polar cap mesosphere, measuring electron density profiles, velocities and scatter cross section of PMSE.
The use of the remaining part of the band, i.e. PPDR, PMSE and SDL, is subject for further national considerations.
The introduction of advanced coding schemes and interferometer modes to the EISCAT VHF radar allowed observations of the fine structure of PMSE layers and their modulation by turbulence and gravity waves.
There is a strong international interest in following the development of PMSE as they occur in the altitude region of the middle atmosphere experiencing the lowest minimum temperature in the atmosphere as a whole.
Long-term continuous observations of phenomena such as PMSE will lead to an improved understanding of their occurrence and possible significance in diagnosing long-term change.
The EISCAT observations of PMSE proved that these layers are not caused by neutral atmosphere turbulence, but supported the theory of reduced electron diffusion in the presence of heavy ions, charged dust or ice particles in the cold summer mesopause.
A secondary allocation of this sub band is furthermore dedicated to PMSE (Programme- making and Special Events) services.