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Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
PILOT SELECT RAIM 2/2 page, shown in Figure 6--67, supports
satellite deselection. From the PILOT SELECT RAIM 2/2 page, the pilot
selects which GPS satellites are to be excluded from the PILOT
SELECT RAIM predictions. The pilot enters the PRN code for the
satellite scheduled to be out of service according to published GPS
NOTAMs.
2L, 2R, 3L and 3R -- The satellite PRN is entered on these lines.
D
Dashes are displayed when *DELETE* is entered. All PRN numbers
are cleared after the aircraft has landed.
While the GPS is computing the predicted RAIM at the destination or
pilot selected waypoint, the message COMPUTING RAIM is displayed
on the DESTINATION RAIM and PILOT SELECT RAIM pages.
Additional Details About PRN
GPS satellites are identified by one of two unique numbers: satellite
vehicle number (SVN) or PRN code. The SVN is the permanent
physical identification number assigned to each satellite when
launched. The SVN increments with each launch of a satellite as new
satellites replace older ones. There are only 32 PRN codes available
for use by the GPS satellites in the current GPS constellation.
A28- - 1146- - 181
REV 3 Mar 2009
Honeywell International Inc. Do not copy without express permission of Honeywell.
Figure 6- -67
PILOT SELECT RAIM 2/2
01466.01
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6-83
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