Wind Packet - Advanced Navigation Spatial FOG Dual Reference Manual

navigation using aircraft airspeed. The packet should contain differential pressure in
Pascals. If outside air temperature is available it should be set in the message for
increased accuracy, otherwise this field should be set to 15 degrees.
Packet ID
Length
Field Bytes
# Offset
1 0
2 4
Table 79: External pitot pressure packet
13.9.38

Wind Packet

This packet provides Spatial FOG Dual's current 2D wind velocity. These values are
only valid when external air data is provided to Spatial FOG Dual. This can be either
through the External Pitot Pressure Packet, the External Air Data Packet or when a pitot
tube is interfaced to one of the GPIO pins. When this packet is written to the device, it
disables the wind estimation filter and the wind values provided are used statically.
Packet ID
Length
Field Bytes
# Offset
1 0
2 4
3 8
Table 80: Wind packet
External Pitot Pressure Packet
Data Size
Type
fp32 4
fp32 4
Data Size
Type
fp32 4
fp32 4
fp32 4
Spatial FOG Dual Reference Manual
Description
Differential pressure (Pascals.)
Outside air temperature (deg C)
Wind Packet
Description
Wind velocity north (m/s)
Wind velocity east (m/s)
Wind velocity standard deviation (m/s)
Page 115 of 138
Version 1.0
26/06/2015
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