|
| | Abstract | | We have been designing and developing an active seismic exploration package with seismometers, active seismic source and anchoring system. Our seismic exploration package was designed to investigate from shallow formation (i.e., ice saturation) to deep formation (i.e., thickness of regolith) of the Moon. Here we present the basic concept of our seismic exploration package and its experimental results. We then discuss the possibilities of future space missions. To evaluate our active-source seismic exploration system, we conducted seismic exploration in the test field in Japan Aerospace Exploration Agency (JAXA). The test field is filled with loose sands of ~50cm thickness. In this experiment, we conducted seismic survey with several acquisition parameters. When we applied the active seismic survey for small-size receiver array, we retrieved clear shot gather. We further calculated dispersion curve from the shot gather and obtained S-wave velocity profile beneath the array using inversion. The S-wave velocity in shallow formation was accurately estimated and continuously increases for depth direction, suggesting that ice can be identified as anomalous high S-wave velocity via our seismic system. |
|
|
|
| |
|