As far as I know satellite data can be used for moho depth determination. If you have any shipborne gravity data then extract satellite gravity data along the same profile at the same position(using GMT command grdtrack or by some other means) and then compare both you will not get much difference. The available 1min satellite derived grid data should give good result.

Dear Avinash,

Yes satellite gravity can be used to model the Moho depth. You need to use Parker-Oldenburg algorithm which you can find in this paper which include also a code to do the job:

https://www.researchgate.net/publication/250730195_3DINVER.M_A_MATLAB_program_to_invert_the_gravity_anomaly_over_a_3-D_horizontal_density_interface_by_ParkerOldenburg%27s_algorithm

Then you need to provide the code with:

1- Average density contrast between the Mantle and Crust which you can find in the literature .

2- Average crustal thickness that you can get using receiver function estimates from seismological data or any other literature.

Here is an example where gravity data were used to model Moho:

https://www.researchgate.net/publication/259508096_Gravity_derived_Moho_for_South_America

In order to define the results are good or not, you need to compare it with seismological Moho estimates in order to define the quality of your depth solutions. However, one of the main shortcomings regarding using this modeling approach is the assumption of fixed average density contrast and average Moho depth through different tectonic terrains.

I hope this will help you.

Article 3DINVER.M: A MATLAB program to invert the gravity anomaly ov...

Article Gravity derived Moho for South America

Thank you, Islam Fadel...

What should be the area for the power spectrum analysis??

Dear Avinash,

I think that the above answers deal with the use of Parker-Oldenburg's method to directly estimate the crust-moho interface from the data (inversion). However, the method uses frequency domain processing to somewhat extract spectral content of the data. So, it is not the spectral analysis (radially averaged) that we usually use to estimate the depth of the anomalous source (in a whole) and to filter the data.

Dear Hendra Sir,

Thank you for your suggestion... 

Can you tell me about the what should be the area (in terms of lat-long) to calculate the moho depth using power spectrum analysis?

Thanks

Avinash

Dear Avinash, 

I am sorry, I can not answer your question exactly. However, I read somewhere (I forgot) that we should have potential field data with lateral extension 4-5 times of the target depth (I might be wrong about the numbers). So, you should have an estimate about the possible depth of moho in your area of interest...

Good luck.