1. Introduction  
2. Data and Methodology  
2.1. Data Selection  
2.2. Data Preparation  
2.3. Spectra Calculation  
2.4. Spectral Fitting  
3. Results  
4. Discussion of Results  
4.1. Model Fitting  
4.2. Spectra Averaging  
4.3. Limitations of Approach  
5. Model Components  
5.1. Lorentzian  
5.2. Power Law  
5.3. White Noise  
5.4. Periodic Penumbral Voids and Umbral-Penumbral Transitions  
6. Summary