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Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
The PRN is a complex code of 1(s) and 0(s), transmitted by a satellite,
uniquely identifying a satellite in the GPS constellation. The code is
named pseudo--random because the code is very long and appears to
be a random sequence. The GPS system is designed for a maximum
of 32 unique PRN codes transmitted by satellites within the
constellation. A GPS receiver takes the satellite signal code and
correlates the satellite code to one of the known stored 32 PRN codes
within the receiver. By correlation with the satellite transmitted code, the
receiver is able to determine which satellite is being received. Knowing
which satellite is being received, the GPS receiver is able to make
pseudo--range measurements in determining a given navigation
solution.
VOR/DME PAGE
THE VOR/DME(X) X/2 page, shown in Figure 6--68, is selected using
the VOR/DME prompt on the POS SENSORS page. The VOR and
DME data received from the radio is displayed. Each NAV radio
received by the FMS has its own page. Access to the NOTAM page is
given at 6R.
00709.04
Figure 6- -68
VOR/DME 1 1/2 Page
A28- - 1146- - 181
Navigation
6-84
REV 3 Mar 2009
Honeywell International Inc. Do not copy without express permission of Honeywell.
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