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DISCUSSION

$\hbox{\rm\bf Group}\bigl(\theta\bigr)$ vs $\hbox{\rm\bf phase}\bigl(\theta\bigr)$ vs $\hbox{\rm\bf group}\bigl(\phi(\theta)\bigr)$
Thomsen's anisotropy parameters and errors
First break versus first peak
How can you tell if you're in trouble?

Stanford Exploration Project
12/18/1997