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As for "computed", I would agree with the other poster that "calibrated" is probably what they meant. Probably "lost in translation", but either way I doubt the numbers change much.
originally posted by: hutch622
a reply to: Zaphod58
so according to their ground speed they were flying at about mach 1.12 or something like that.
Ok . So is a sonic boom relative to the ground , or relative to the air around the plane . Honest question .