...
In the following tables, a positive height difference indicates that the sonic is higher than the base of the boom. The height differences are in cm. The Date/time in the first column is when the new height difference takes effect.
...
...
In the following tables, a positive height difference indicates that the sonic is higher than the base of the boom. The height differences are in cm. The Date/time in the first column is when the new height difference takes effect.
...