initial upload

test/old_tests/inversion_one_src/README.md

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+# Inversion test 
+
+This is a test setup for inversion calculation.
+
+1. Run all cells of `make_test_model.ipynb` or `make_test_model.py` for creating
+    - source, receiver file (src_rec_test.dat)
+    - true model (test_model_true.h5)
+    - initial model (test_model_init.h5)
+
+2. then run TOMOATT forward with `input_params_pre.yml` for calculating the true arrival times at the stations
+-> this will output src_rec_test_out.dat file which includes the true arrival times
+```bash
+mpirun --oversubscribe -np 8 ../../build/TOMOATT ./input_params_pre.yml 
+```
+
+3. run TOMOATT in inversion mode with `input_params.yml`.
+-> this will output src_rec_test_out.dat file which includes the true arrival times
+```bash
+mpirun --oversubscribe -np 8 ../../build/TOMOATT ./input_params_pre.yml 
+```
+
+4. for visualizing the result files
+```bash
+paraview out_data_sim_0.xmf
+```
+
+0 is the source id. The kernel and model fields are output in the file of 0th source. 
+
+
+