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General Discussion / Re: Woudl like to test my Mode C altitude output using my Rossetta
« on: June 06, 2019, 06:24:26 pm »
Its only mode A-C not mode S, so I am expecting a bearingless target with altitude.
I would have thought that PA would report accurately a received mode C Altitude? based on the assumption that the encoder source is correct? if it was not thats kind of what I am checking.
Appreciate it can only display what it sees.
Got me thinking though ...ATC makes a QNH calculation against the standard 1013mb ( or hecto thingies ) to work out Alt and that should correspond with a correctly set altimeter running on the same QNH within the tolerance.
How does PA calculate the relative height I guess it must use the internal BARO sensor ..how is that calibrated ...ummm
I would have thought that PA would report accurately a received mode C Altitude? based on the assumption that the encoder source is correct? if it was not thats kind of what I am checking.
Appreciate it can only display what it sees.
Got me thinking though ...ATC makes a QNH calculation against the standard 1013mb ( or hecto thingies ) to work out Alt and that should correspond with a correctly set altimeter running on the same QNH within the tolerance.
How does PA calculate the relative height I guess it must use the internal BARO sensor ..how is that calibrated ...ummm