andwatson / decompose_insar_velocities Goto Github PK

NaNNed are in interpolated GNSS velocity causes inversion of insar pixels to fail

Hi Andrew,

Can you check several lines in the codes: Active-Tectonics-Leeds/decompose_insar_velocities/tree/main/util/vel_decomp_vE_vUN.m?

In the line 145, the cosd(inc) should be squared;

In the line 147, the gnss_sN should be squared;

I compared the codes with the equations in your thesis and found these problems.

Can you check it?

Best wishes,

Dehua

Add colour bar limits and figures sizes into parameter file.
Alternatively, automate figure sizes based on number of subplots.

See Dodds' thesis.

% mask after deramping (deramp isn't carried forward)
% use a hardcoded 10 mm/yr limit to remove large signals (mainly
% subsidence and seismic)
vel_deramp = deramp(x,y,vel_tmp);
vel_deramp = vel_deramp - mean(vel_deramp(:),'omitnan');
vel_mask = vel_deramp>10 | vel_deramp<-10;

Take a fixed faut strike and decompose LOS into fault-parallel and vertical. Either assume zero fault-perpendicular, or use gnss.

A given pixel may have velocities from two frames on the same track, which are currently treated as independent.
Given that the underlying data is the same, we need to set some sort of correlation between these observations.

Currently the regridding coordinates are automtically calculated based on the input velocities.
Allowing the user to pre-define the grid would make it easier to mosaic together multiple decomposed velocities, which might be a good way of doing very large velocity fields.

Dear sir/madam,

Actually, this the first time I am using Matlab. So, I am facing difficulty while deal with errors. I had run the code on the example dataset, It worked but the problem is, I am not able to export them (in geotiff, grd..). Please help how can I rectify it.

Thanking you in advance,

This is what the error message displays:

Error using matlab.internal.imagesci.netcdflib
The NetCDF library encountered an error during execution of "create" function:
"No such file or directory (2)".

Error in netcdf.create (line 61)
ncid = matlab.internal.imagesci.netcdflib('create', filename, mode);

Error in grdwrite2 (line 41)
ncid = netcdf.create(file, 'NC_SHARE');

Error in decompose_insar_velocities (line 422)
grdwrite2(x_regrid,y_regrid,m_up,[par.out_path par.out_prefix '_vU.grd']);

Hello, Which software should I use to interpolate my GNSS data?
Thanks.

While the testing version now using sparse matrices, the main branch does not (easier to work with).
Improve RAM usage through other methods - can we switch all arrays to single?