Preparing RAW data for ROI_PAC:
- If you download a .zip file that contains a .DAT file and no .raw file, you will need to run the following
script to make the raw format.
Note that depending on the satellite data you are using, a different
program is needed to make the raw files. However, after this point all files should work similarly
with the rest of the programs (but you still cannot combine data from satellites with different frequency-bands
or orbits).
- To convert a DAT file into a RAW file for ROI_PAC processing we need to run the following in each
of the directories that contain radar image files.
- Unzip the files:
% cd ~/MGM/HectorMine/990915 # get into image directory
% unzip ERS2_127_2907_23027.zip
Repeat for other directory.
- Rename a couple of files (I use links) to the YYMMDD format that you are using for your current directory.
% ln -s LEA_01.001 990915.ldr
% ln -s DAT_01.001 IMAGERY.dat
Repeat for other directory.
- Run make_raw.pl on the data. Typing the command with no arguments gives the basic usage.
make_raw.pl 'ORBIT' 'YYMMDD'.ldr 'YYMMDD' # this can take a couple of minutes
ORBIT = ODR Delft Orbit Determination for ERS satellites
YYMMDD = date of the image
% make_raw.pl ODR 990915.ldr 990915
Repeat for other directory.
- Check the file 990915.raw.rsc to see if DOPPLER_RANGE0 is between +-0.5. If it is not,
add or subtract 1 to it and replace the field. Sometimes the doppler ambiguity is not correctly calculated,
particularly for later ERS2 data (after the gyroscopes died), thus it needs to be updated manually.
Prepare Running Directory
In order to allow us all to process with efficiency, we will run the actual InSAR processing on tohoku.
On Tohoku: (be sure to switch to group MGM)
- In the HectorMine directory, create process file (990915_991020.proc) that the program process_2pass.pl reads. The contents
of the file are as listed below.
SarDir1=990915
SarDir2=991020
IntDir=int_990915_991020
DEM=/home/anewman/MGM/HectorMine/DEM/HM.dem
flattening=topo
OrbitType=ODR
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# location of SAR data
# directory to create interferograms in
# location of your DEM
# remove topographic fringes
# Use Delft satellite orbit determinations
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Process data to create interferograms
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