A comparison of Gravity Wave Parameters derived from the Analysis of a Three-Field Photometer with Imagers
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- Institutt for fysikk 
A method for preprocessing and analysing a few select fields in airglow intensityimages from an all-sky imager was developed and utilized. Wavesdetected with a three-field analysis were compared with those waves visuallydetected in the images to evaluate the option of replacing or supplementingexpensive imager systems with lower cost three-field photometers. The smallfieldanalysis developed and utilized in this work yields accurate estimates ofwave period, given data with a sufficienty high sampling frequency. The qualityof wavelength and propagation direction estimates depends strongly onthe field configuration, but overall, these wave parameters are estimated withless accuracy than the period. By comparison, event analyses are well suitedfor deriving the wavelength of short-period waves, but the periods are moreuncertain. The method of analysis developed in this work demonstrates thatthe utilization of small-field observation systems like photometer-systems ortelescopes, when optimized, has great potential to supplement and extendimager observations.