Power spectral depth estimation

Q&A
1

Hi all,

Just a quick query. When using grdfft to get the power spectra and plotting log (power) vs wavenumber (1/wavelength), the linear slope segments are broadly proportional to depth. I cannot recall if it is slope/4pi for depth so hope someone can point me in the correct direction.

Working with GMT 6.4.0 on Windows 11

Thanks
Lester

2

Hello @arctica,

to make your question easier to understand, please provide a code example (including the required data) demonstrating your issue. Please copy-past all warning or error messages. Also, showing your current output figure (even it is not what you expect or finally want) will help people to help you :slightly_smiling_face:.

3

Mirone does that. I think the code is in the ecran.m file. Should not be dificult to find the function that does the calculus.