- Exact functional form unknown but based on those of Campbell (1981), Fukushima and Tanaka (1990)
and Abrahamson and Litehiser (1989).
- Use three site classes.
- Develop separate equations for each site class. Only possible for two classes. Therefore, modify equation
derived for site class C to obtain coefficients for other two classes.
- Digitization sampling rate of records used is 50Hz. Most data low-pass filtered at 24.5Hz.
- Most data high-pass filtered with cut-offs above 0.25Hz.
- Due to limited data, advise caution when using model.