Weather Radio User Manual

PRIMUS
r
880
Digital
W
eather
Radar
System
A28-1146-102-00
Radar Facts
5-24
In prolonged turns, gyro precession can occur that is tracked by the
stabilization system and appears asundesirable groundtargets onthe
indicator. Forexample,a1°precessionerror(whichwould probablynot
be noticed on the gyro horizon) moves the antenna beam
approximately 10,500feet ata point100 NMfrom theaircraft, Ifground
targets between 50 and 80 NM depending on aircraft altitude and the
actual setting of the tilt control.
10
5
15
20
AD-17723-R1@
GMAP
Roll Stabilization Inoperative
Figure 5-22