Reply Referee #2

Abstract

We would like to express our gratitude to the anonymous reviewer (#2). for his thorough review. The constructive comments helped to improve the manuscript. In this file, we will reply the major issues included in the revision. All changes will be added to the last version of the manuscript. We attach a commented pdf version of the final text after the revision from both reviewers as a supplement file. Lines and pages in our reply refer to those in the supplement file.REPLY TO COMMENTS REFEREE 2 * The data description beginning on page 4 line 27 is hard to follow. Consider moving much of the detailed references to CDP numbers and reflector times to the figure captions C1