initial upload

test/old_tests/inversion_tele_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` for creating
+    - source, receiver file
+    - true model
+    - initial model
+
+2. then run TOMOATT forward with `input_params_pre.yml` for calculating the true arrival times at the stations
+-> this will output src_rec_result.dat file which includes the arrival time at each station
+
+3. run TOMOATT in inversion mode with `input_params.yml`.
+
+4. at first, TOMOATT calculates 2d traveltime field for each teleseismic event.
+TOMOATT will find the event source is teleseismic if the event origin is outside of the simulation domain.
+Calculated 2d traveltime field is saved in OUTPUT_FILES directory with 2d_travel_time_field_{src_id}.h5
+2D solver run will be skipped if this file is found by TOMOATT.
+