I am trying to process a pair of ALOS-2 images using the DINSAR method. But the fringes are located too often and the displacement is too large. I tried to use the function “Residual Fringes Removal”, but this did not change the result.
Any ideas why this is happening and how to get a plausible result.
Pair info: Bn DC Bt Id Temp
20160926 0 0.00 0 62 2.9
20170925 -3 0.00 364 62 0.9
Hello to all.
I am processing the ALOS-2 data for the first time and asking for help.
we contacted RESTEC. We tried to find out the technical details.
they answered us:
“JAXA L1.1 products are not focused in Zero Doppler geometry.
Please check the format documentation and it required to calculate.
For your reference: https://www.eorc.jaxa.jp/ALOS-2/en/doc/fdata/PALSAR-2_xx_Format_CEOS_E_f.pdf
“PALSAR-2 Product Format Description”
Look at pages 82-83 (Facility related data records Field 21-26), which
contains table coefficients and equations.”
those who worked with the data of ALOS-2, please help to understand.
1. any product ALOS-2 L1.1 is always not focused in the geometry of the zero Doppler?
2. in order to process the ALOS-2 data in Sarproz, they must be in the geometry of zero dopler, right?
Sarproz manages both skewed and de-skewed data (zero and non-zero Doppler geometry).
As previously said, your data needs further investigation: we need to look into the details for understanding what’s wrong.