Garmin G1000 Series, Pilot'S Manual

Page: 226 / 338

Garmin G1000 Pilot’s Guide for the Diamond DA40
190-00592-00 Rev. A 7-92
MULTI FUNCTION DISPLAY
Satellite Status Page
• Satellite constellation displaying the following for
each satellite being tracked:
Azimuth
Elevation
PRN number
Tracking status
• A receiver tracking status display that displays the
following GPS sub-system status situations:
‘2D NAV’, when only 2-dimensional position is
available
‘3D NAV’, when 3-dimensional position is avail-
able
• Estimated position error
• Dilution of precision
• Horizontal uncertainty level
• GPS calculated position
• GPS calculated time of day
• GPS calculated altitude
• Ground Speed
• Track
The sky view display at the top left corner of the page
shows the satellites currently in view as well as their
respective positions. The outer circle of the sky view
represents the horizon (with north at the top of the circle);
the inner circle represents 45° above the horizon and the
center point shows the position directly overhead. Each
satellite has a 30-second data transmission that must be
collected (hollow signal strength bar) before the satellite
may be used for navigation (solid signal strength bar).
Once the GPS receiver has determined your position, the
G1000 indicates your position, altitude, track and ground
speed.
The GPS receiver status field also displays the following
messages under the appropriate conditions:
• Acquiring Sat - The GPS receiver is acquiring
satellites for navigation. In this mode, the receiver
uses satellite orbital data (collected continuously
from the satellites) and last known position to
determine the satellites that should be in view.
• 2D Navigation - The GPS receiver is in 2D naviga-
tion mode.
• 3D Navigation - The GPS receiver is in 3D naviga-
tion mode and computes altitude using satellite
data.
The Satellite Status Page also indicates the accuracy
of the position fix, using Estimated Position Error (EPE)
and Dilution of Precision (DOP) figures. DOP measures
satellite geometry quality (i.e., number of satellites
received and where they are relative to each other) on a
range from 0.0 to 9.9. The lowest numbers are the best
accuracy and the highest numbers are the worst. EPE uses
DOP and other factors to calculate a horizontal position
error, in feet or meters.