Evaluation of Mobile Seismic Platform in Heterogeneous Regolith Simulant

LPSC 2025 poster on seismic experiment at the NASA Marshall Space Flight Center Lunar Regolith Terrain field.

Two GPR-related data files are now available. One (SEGY format) is the actual ground-penetrating data and the other explains the acquisition parameters. These data correspond to the W-to-E profile shown in the poster.

Three seismic-related data files are now available.  The best Vs-versus-depth models for these 3 data sets appear wtihin the poster. Interpreted modes in calculated seismic dispersion plots were inverted to derive these models.

Each data set is identified by the orientation (E-to-W or N-to-S) in which it was collected as well as whether the data were collected using horizontal-component accelerometers mounted on wheels ("MobileSeismicPlatform") or using conventional geophones (GS-100; the 100 Hz refers to the rollover frequency in the performance chart for these particular type of geophone)

Users should be aware of the units assumed for the header values so that they can adjust them accordingly.

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For the file MobileSeismicPlatformEtoW.segy:

Offsets in the headers are cm (not m), ranging from 20 cm to 207 cm. In the header, the sampling interval =125, i.e., the data were collected in the field using a sampling interval of 125 microseconds. The delay time shown in the header is -10 ms and the data were collected in the field with that same delay time.

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For the file StoN_MobileSeismicPlatform.segy:

Offsets in the headers are cm (not m), ranging from 15 cm to 150 cm. In the header, the sampling interval =125, because the data were collected in the field with a sampling interval of 125 microseconds. The delay time shown in the header is -10 ms and the data were collected in the field with that same delay time.

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For the file: StoN_vertical_geophones_100Hz.segy:

Offsets in the headers are cm (not m), ranging from 10 cm to 175 cm. In the header, the sampling interval =125, because the data were collected in the field with a sampling

interval of 125 microseconds. The delay time shown in the header is -10 ms and the data were collected in the field with that same delay time.