Making interferogram for TANDEM-X bistatic mode

ABraun · January 24, 2019, 8:49am

If you try again to coregister both images again and the interferogram is not sufficient:

Consider a higher orbit interpolation degree (differences are shown here: ALOS SLC L1.1 interferometry processing parameters and here Problem with Using ALOS Data)
There was a nice study which explained the linear fringes by rotation of the sea ice during both acquisitions: https://elib.dlr.de/72754/1/0003594.pdf Could this partly explain the gradient you demonstrated here? A wierd gradient over my result

marjanmarbouti · March 2, 2019, 1:19pm

One more question regarding mosaicing:

I have two products from ASTER 1 SEC. They are listed here:

ASTGTM2_N70W157.tif

I tried to make mosaic from them by using (Raster…Geometric operation…mosaicing) and the result is OK and it is saved in ‘band 1’ but it also produced one extra band named ‘band-1-count’.

Figure1.

I want to delete 'band-1-count ’ but it is not possible.

I tried to use export in geotiff and I only selected ‘band 1’ (fig2 and 3) but I have some problem there
(fig4)

Figure2.

Figure3.

Figure 4.

smyle · November 7, 2019, 1:08pm

I am not sure if this has been discussed already, but I try to find it, and found none

Aniway, is it possible to merge two scenes of bistatic TanDEM-X and keep the format as SAR product?
My study area is longer than the TDX scene, and thus I need multiple scenes

I don’t have problem generate DEM one by one
but it seems there are strange results because phase unwrapping is performed separately
the DEM from SNAP seems tilted perpendicular to the acqusition direction, so I need to remove the trend

I try SAR mosaic to merge them, but the output is not SAR product anymore, and thus I cannot make interferogram out of it

Thank you