Advanced Navigation Boreas D90 - External Air Data Packet; External Air Data Flags

11.4.40 External Air Data Packet
External Air Data Packet
Packet ID 68
Length 25
Read / Write Read / Write
Field # Bytes Offset Data Type Size Description
1 0 fp32 4 Barometric altitude delay (s)
2 4 fp32 4 Airspeed delay (s)
2 8 fp32 4 Barometric altitude (m)
3 12 fp32 4 Airspeed (m/s)
4 16 fp32 4 Barometric altitude standard deviation (m)
5 20 fp32 4 Airspeed standard deviation (m/s)
6 24 u8 1 Flags
Table 107: External Air Data Packet
11.4.40.1 External Air Data Flags
Bit Description
0 Barometric altitude set and valid
1 Airspeed set and valid
2 Barometric altitude reference reset
Table 108: External Air Data Flags
Barometric altitude does not need to be referenced to any co-ordinate frame or QNH. If the barometric altitude
reference is changed during operation, the barometric altitude reference reset flag should be set for the next
packet.
v1.2 Page 146 11 Oct 2022
Boreas Reference Manual • Advanced Navigation Packet Protocol