Re: Swatton.
1 Newton is the force to accelerate a mass of 1kg at 1m/s^-2, not 1kgx1m/s^-2
Kg are mass and Newtons are force. So 1kg causes about 10 N force downwards at 1g. It is untrue to say that 1kg is about 10N.
ASIR = IAS, they are simply different words for the same thing.
Whilst you can technically separate out gauge errors from pressure/position errors - it isn't actually done that way. Gauge errors are assumed to be trivially small and randomly distributed, so we only consider PEC in total as the total difference between IAS and CAS.
G