48
Reference section 3 — Position coordinates
Viewing GPS satellite status
Northstar 972
Time format
Choose:
•
12-hour clock or 24-hour clock
To designate the time zone for your area,
see
Changing the time zone,
on page 153.
Viewing GPS satellite status
To display more information about the
signals received from the GPS satellites,
press
Sat info…
on the
GPS Position
screen.
The
GPS Satellites
screen shows the
received Signal-to-Noise Ratio (SNR) for
each satellite (the higher the SNR, the
better the quality of the satellite signals),
and a map indicating where the satellites
are currently located in the sky. The satel-
lites are identified by their PRN number, a
one- or two-digit number assigned by the
U.S. government.
GPS satellites are represented by circles;
WAAS satellites are represented by ovals.
The center of the satellite map represents
the center of the sky, and the outermost
ring is the horizon. The view is looking
down from above, with east to your right
and west to your left.
HDOP (Horizontal Dilution of Precision) is
a technical measure of the quality of your
position fix. It is calculated from the satel-
lites’ current positions. You’ll usually see
an invalid HDOP value displayed immedi-
ately after the 972 is turned on, before it’s
ready to navigate. HDOP can range from
an ideal value of slightly less than one, up
to poor values of 10 or more. Any value
less than two indicates an excellent satel-
lite configuration.
Satellite status screen
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Страница 1: ...Northstar 972 Quickstart Guide and Reference Manual Revision B ...
Страница 12: ...8 Getting Started Purchasing charts Northstar 972 ...
Страница 19: ...15 Displaying the chart screen Quickstart Guide Revision B Chart screen ...
Страница 30: ...26 SAVE and Man Overboard MOB Northstar 972 ...
Страница 44: ...40 Reference section 1 Using the Chart Screen Using the distance and bearing calculator Northstar 972 ...
Страница 54: ...50 Reference section 3 Position coordinates Using Phantom Loran Northstar 972 ...
Страница 88: ...84 Reference section 5 Creating waypoints and routes Transferring waypoints to and from a PC Northstar 972 ...
Страница 90: ...86 Reference section 6 Radar Transferring waypoints to and from a PC Northstar 972 ...
Страница 106: ...102 Reference section 7 Echo sounding MARPA targets Northstar 972 ...
Страница 130: ...126 Reference section 7 Echo sounding Troubleshooting the echo sounder Northstar 972 ...
Страница 131: ...127 Reference Manual Revision B Reference section 8 Video Video sources 128 Displaying video 128 ...
Страница 134: ...130 Reference section 8 Video Displaying video Northstar 972 ...
Страница 135: ...131 Reference Manual Revision B Reference section 9 Alarms and TideTrack Alarms 132 TideTrack 137 ...
Страница 145: ...141 Reference Manual Revision B Reference section 10 Networking General information 142 Restrictions 142 ...
Страница 148: ...144 Reference section 10 Networking Restrictions Northstar 972 ...
Страница 158: ...154 Reference section 11 Setup Changing the time zone Northstar 972 ...
Страница 164: ...160 Reference section 11 Appendix A Datum list Changing the time zone Northstar 972 ...
Страница 168: ...164 Northstar 972 Notes ...
Страница 169: ...Notes 165 Operator s Manual Revision B ...
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