Example implemented with two amplitudes with period

Author: actarus2971

examples/input/campobasso.json

@@ -50,6 +50,7 @@
                 "time1": "2023-03-28T21:53:03.46Z",
                 "amp2": 343,
                 "time2": "2023-03-28T21:53:03.1Z",
+                "period": "0.8",
                 "lat": 41.513145,
                 "lon": 14.910201,
                 "elev": 487
@@ -63,6 +64,7 @@
                 "time1": "2023-03-28T21:53:02.23Z",
                 "amp2": 393,
                 "time2": "2023-03-28T21:53:02.47Z",
+                "period": "0.8",
                 "lat": 41.513145,
                 "lon": 14.910201,
                 "elev": 487