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Article summary:
1. A local cross-correlation imaging condition is proposed for reverse time migration (RTM) to reduce the limitation of synchronous availability of source and receiver wavefields.
2. This method only requires storing a complete waveform of the direct wave in each spatial node’s record, and does not require remodeling the source wavefield.
3. Numerical simulations show that this method can generate high-accuracy images and reduce storage cost significantly.
Article analysis:
The article provides a detailed description of the proposed local cross-correlation imaging condition for reverse time migration (RTM). The article is well written and provides sufficient evidence to support its claims, such as numerical simulations showing that this method can generate high-accuracy images and reduce storage cost significantly. However, there are some potential biases in the article that should be noted. For example, the article does not explore any counterarguments or present both sides equally when discussing the advantages of this method over other methods. Additionally, it does not mention any possible risks associated with using this method or provide any evidence for its claims beyond numerical simulations. Furthermore, it could be argued that more research needs to be done to fully understand the implications of using this method before it can be widely adopted in RTM or other adjoint-state methods.
Topics for further research:
Reverse Time Migration Advantages and Disadvantages
Risks of Local Cross-Correlation Imaging Condition
Implications of Local Cross-Correlation Imaging Condition
Comparison of Local Cross-Correlation Imaging Condition to Other Methods
Evidence for Claims of Local Cross-Correlation Imaging Condition
Real-World Applications of Local Cross-Correlation Imaging Condition