GNSS receiver data autologging and processing
Ionospheric scintillation is a phenomenon known to have many detrimental effects on the quality and integrity of signals received from global navigation satellite systems. Since it’s a common phenomenon in Singapore, this project aims to plot and model the mathematical relationship between scinti...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/75322 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Ionospheric scintillation is a phenomenon known to have many detrimental effects on
the quality and integrity of signals received from global navigation satellite systems.
Since it’s a common phenomenon in Singapore, this project aims to plot and model
the mathematical relationship between scintillation values and time intervals. This
was done by extracting, plotting and modeling the recorded GNSS data using
MATLAB. Two main mathematical models for fitting were implemented: polynomial
Gaussian. For 2D fitting of scintillation against local time (LT), as well as day of year
(DOY), the Gaussian model was shown to be a better mathematical model for the
fitting of both amplitude and phase scintillation data. For 3D fitting of scintillation
against LT and DOY, a 5th degree polynomial surface in both X and Y was generated.
However, this model was not able to fit the higher scintillation data recorded. Due to
limitations in MATLAB, higher degree polynomial surfaces were unable to be carried
out. To further improve on the quality of generated fits, further research on the
methods as well as existing scintillation models is recommended |
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