Table of Contents
Advertisement
8.3.13
GPS Antenna Offsets
The GPS antenna offset is used in conjunction with the length and width to
manage taxiway conflicts. A typical GPS does not report the geographic
position of the center of the aircraft, or even the tip of the nose of the
aircraft; instead, it usually reports the location of the actual GPS antenna
(not the GPS receiver). In normal flight operation this distinction is of no
importance at all, but if ADS-B is used to manage taxiway conflicts, a
significant offset in antenna position could mean that the aircraft footprint is
not in the same place as the ADS-B reported position. Although the GPS
Antenna Offset is primarily intended for position correction on large
transport aircraft, General Aviation aircraft can also have a significant
offset. For example, if the aircraft has a long tail boom and the GPS
antenna is on top of the tail, the GPS position could be 4 meters or more
from the nose of the aircraft.
Enter the GPS Antenna Offset Lateral from Roll axis (Meters)
0
Left 2
Left 4
Left 6
Enter the GPS Antenna Offset Longitudinal from Aircraft nose
(Meters)
0 to 60 Meters in 2 Meter increments
8.3.14 System Design Assurance (SDA)
The RTCA standards require SDA =1 before data can be presented to
aircraft with certified ADS-B In systems. Sky Echo is capable of SDA 1
which is set by default.
UAV-1002156-001
ECCN 7A994
REV M
Right 2
Right 4
Right 6
Page
26 | 35
Advertisement
Table of Contents
