Reproduce: GRAV3D v6.0.1#

Inverting Gravity Data Over a Block in a Halfspace: Smoothest Least-Squares#

Here, we invert gravity anomaly data collected over a block within a homogeneous halfspace. We invert for the smoothest model using an unconstrained least-squares inversion approach.

The true model consists of a denser block (0.1 \(g/cm^3\)) within a halfspace (0 \(g/cm^3\)). The dimensions of the block in the x, y and z directions are all 200 m. The block is buried at a depth of 200 m.

The data being inverted were generated using the UBC-GIF GRAV3D v6.0.1 code. Synthetic gravity data were simulated at a heigh 1 m above the surface within a 1000 m by 1000 m region; the center of which lied directly over the center of the block. Gaussian noise with a standard deviation of 0.002 mGal were added to the synthetic data. Uncertainties of 0.002 mGal were assigned to the data before inverting.

UBC-GIF GRAV3D v6.0.1 Package Details#

GRAV3D v6.0.1 is a voxel cell gravity forward modeling and inversion package developed by the UBC Geophysical Inversion Facility. This software is proprietary and can ONLY be acquired through appropriate academic or commerical licenses. The numerical approach of the forward simulation is described in the online manual’s theory section. If you have a valid license, the steps for reproducing the simulating results are explained below.

Running the Inversion#

Step 1: Acquiring a commercial or academic license.#

  • Explain and link to where you would get licenses. Make ABSOLUTELY CLEAR we don’t just give out the licenses willy-nilly.

Step 2: Downloading and extracting assets#

  • Link and instructions for download

Step 3: Running the forward modeling executable#

  • Brief description of what files are needed

  • Link to the manual page where we run the forward simulation