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A comparison of Gravity Wave Parameters derived from the Analysis of a Three-Field Photometer with Imagers

Bakken, Irene
Master thesis
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URI
http://hdl.handle.net/11250/2352116
Date
2015
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Abstract
A method for preprocessing and analysing a few select fields in airglow intensity

images from an all-sky imager was developed and utilized. Waves

detected with a three-field analysis were compared with those waves visually

detected in the images to evaluate the option of replacing or supplementing

expensive imager systems with lower cost three-field photometers. The smallfield

analysis developed and utilized in this work yields accurate estimates of

wave period, given data with a sufficienty high sampling frequency. The quality

of wavelength and propagation direction estimates depends strongly on

the field configuration, but overall, these wave parameters are estimated with

less accuracy than the period. By comparison, event analyses are well suited

for deriving the wavelength of short-period waves, but the periods are more

uncertain. The method of analysis developed in this work demonstrates that

the utilization of small-field observation systems like photometer-systems or

telescopes, when optimized, has great potential to supplement and extend

imager observations.
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NTNU

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