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buy asendin If palaeoregolith layers exist within the uppermost 330 feet (100 meters) or so of the moon's topside, then the Chang'e 3 mission should detect them, Crawford said. While China???s radar-toting spacecraft won't have any means to access such buried layers, "I think the validation of GPR as a means for detecting them, and confirmation of their existence, would be a major contribution to future exploration plans," he said.