Development of a data processing chain for a spatial heterodyne interferometer measuring temperature in the mesosphere and lower thermosphere / von Konstantin Ntokas. Wuppertal, 2023
Content
- Introduction
- Radiative transfer of the oxygen A-band emissions
- Production mechanisms of the oxygen A-band emission
- Rotational structure of the oxygen A-band emission
- Radiative Transfer
- Mathematical modeling of a spatial heterodyne interferometer for temperature derivation
- Spatial heterodyne interferometer
- Fourier-transform spectroscopy
- Signal and noise analysis
- Temperature retrieval
- Temperature retrieval using radiative transfer model
- Temperature retrieval of a homogeneous gas cell
- Chapter summary
- Assessment of the instrument's performance
- Forward simulation
- Test data set extracted from HAMMONIA
- Results of oxygen A-band emission simulations
- Comparison with satellite data
- Performance of an ideal instrument
- Assessment and correction of instrument errors
- Detector-specific processing
- Image distortion correction
- Barber's pole correction
- Baseline and amplitude correction
- Phase correction
- Littrow calibration
- End-to-End simulation based on monochromatic calibration data
- Chapter summary
- Split field of view to resolve horizontal temperature variations
- Methodology and noise error analysis
- Sensitivity to horizontal temperature variations
- Retrieval results of split field of view processing
- Effect of apodization onto split field of view processing
- Multiple split field of view
- Chapter summary
- Summary and outlook
- Appendices
- List of abbreviations
- List of mathematical notation
- Overview of spaceborne instruments used for gravity wave research
- Number density of oxygen in excited and ground state
- Implementation, limitations and possible improvements of the radiative transfer model
- Sensitivity study of the radiative transfer model
- Additional material to Norton-Beer apodization
- Derivation of the analytical Fourier transform of the Norton-Beer apodization
- Python toolbox for Norton-Beer apodization and its Fourier transform
- Shot noise propagation into the spectral space
- Measurement error and a priori precision matrix
- Mathematical background on Barber's pole
- Example of amplitude, baseline and visibility estimation from monochromatic measurements
- Effectiveness of baseline and amplitude estimation
- Effectiveness of phase estimation
- Acknowledgments
- Bibliography