Fig. 1

An example of received waveforms. This 327.68-μs-long time-series of a reflected echo was received at 00:57:15.181 UTC on May 4, 2008 when SELENE was flying over Mare Imbrium, i.e., (40.226 N°, 345.304 E°) in the selenographic coordinate. It is filtered and resampled as described in the text