Viser treff 1-3 av 3
Air temperature at 90 km altitude in the Artic obtained using meteor radar : validation, characterization and climate change.
(Master thesis; Mastergradsoppgave, 2011-09-30)
Temperatures at 90 km altitude above Ramfjordmoen (69°N, 19°E) have been obtained with the Nippon/Norwegian Tromsø Meteor Radar. The temperatures have been derived from meteor radar decay rates using two techniques: the pressure based and the temperature gradient based methods. The results have been compared to the Microwave Limb Sounder (MLS) instrument on board the Aura spacecraft. It was found ...
Influence of Meteoric Aerosol particles on the Charge Balance in the Upper Mesosphere During ECOMA 2010
(Master thesis; Mastergradsoppgave, 2011-12-15)
This work is focused on the three sounding rocket launches during the ECOMA Geminids campaign in December 2010: One before the Geminids meteor shower, one at its peak and one some days after the peak. In this work, the main emphasis is on analyzing the results from electron and ion probes on the rockets, obtaining electron and ion density profiles, and comparing them with the measurements of meteoric ...
Na lidar measurements during the ECOMA/Geminids campaign with focus on Na peak density and temperature
(Master thesis; Mastergradsoppgave, 2011-02)
Using a resonance lidar, atomic Na (sodium) can be observed in the 80-110 km altitude range of the atmosphere. Na belongs to the alkali metal group and is highly reactive, so one could expect that it would quickly react with other particles and leave its atomic state. Its actual behaviour however includes the formation of relatively dense layers which, from the perspective of a stationary lidar, ...