Bendix-commercial-vehicle-systems Bendix/King Global Positioning System KLN 35A User Manual Page 92

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KLN 35A Pilot’s Guide Basic GPS Operation
3-57
Effective Date 5/95006-08791-0000 Rev 0
Basic GPS Operation
Chapter 3
6. Move the flashing part of the
cursor to the tens of minutes,
select the proper number
(figure 3-166), then move on to
the last digit and set it.
7. Press F to start the clock
running (figure 3-167). Note that
the seconds will reset to zero
when you do this.
3.13. THE OTHER (OTH) PAGES
3.13.1. DETERMINING THE STATUS OF THE GPS SIGNALS
The Other (OTH) 1 and OTH 2 pages may be viewed at any time to
determine the status of the GPS receiver and the GPS satellites
being received. This includes which satellites are being tracked, the
satellites’ health, the signal-to-noise ratio for each of these satellites,
the elevation of each satellite above the horizon, and the estimated
position error.
The GPS receiver in the KLN 35A is capable of using signals from up
to eight satellites to determine its position. A valid position may be
determined using as few as four satellites alone or three satellites
with a valid altitude input. However, four satellites alone or three
satellites with an altitude input do not necessarily ensure that
navigation can take place. The satellites must be positioned relative
to your location such that sufficient “geometry” exists to determine an
accurate position. the satellite constellation geometry is continually
changing as each satellite, “rises”, travels across the sky, and
eventualy “sets” relative to your position. The GPS satellites are not
in geosynchronous orbits positioned over the same spot on earth at
all times like some television communication satellites with which you
may be familiar. Rather, the GPS satellites are in orbits that allow
them to circle the earth about two times each day.
APT VOR NDB SUP ACT NAV FPL CAL SET OTH
åå.ånm DATE/TIME
åååååå 08 DEC 94
#>Leg 143_:42 MDT
CRSR Mountain Day
Figure 3-166
APT VOR NDB SUP ACT NAV FPL CAL SET OTH
åå.ånm DATE/TIME
åååååå 08 DEC 94
>Leg 1430:00 MDT
CRSR Mountain Day
Figure 3-167
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