Date of Award
Master of Science (MS)
Larsen , Miguel
Burg , Timothy
The neutral winds are a key parameter in the electrodynamics of the ionosphere. The available techniques for measuring vertical neutral wind proﬁles, especially with good height resolution, are extremely limited. This is especially true with sounding rocket ﬂights as it is not practical to take direct measurements of neutral winds with onboard instruments. Chemical releases from sounding rockets, however, allow such measurements by providing a tracer of the motion of the neutral atmosphere at altitudes in the mesosphere and lower thermosphere (MLT). The resulting chemiluminescent trail is typically photographed from two or more locations to track neutral motions. Triangulation based on these photographs then yields position information at each instant when simultaneous photographs are available from diﬀerent locations. The resulting time series of position information can then be used to obtain a neutral wind proﬁle. A technique is presented that improves this existing triangulation procedure by implementing computer vision-based automation techniques and an improved tracking algorithm that can accommodate non-simultaneous image data more easily and can provide better continuity in the motions inferred from consecutive images. Neutral wind proﬁles from the Joule II and HEX II sounding rocket experiments are presented and compared with results from the previous method.
Ingersoll, Justin, "A Regularization Technique for the Analysis of Photographic Data Used in Chemical Release Wind Measurements" (2008). All Theses. 421.