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Press ENTER to return to the SATELLITE STATUS 1 screen. Press SELECT to return to the
MAIN MENU. Pressing SELECT again will exit the Select System and return to the map. Or you
may press MAP, at any time while in the Select System, to return directly to the map display.
Figures 26 and 27 have callouts that correspond with the following list of definitions:
1. CHANNEL- The NS 10 uses a five channel receiver. Four of the channels are each tracking
one satellite. The fifth channel tracks all other visible satellites.
2. STATUS- A particular channel can be in one of 3 states: TRACKING; the channel is receiving
navigation information, ACQUIRING; the satellite is visible and an attempt is being made to
acquire navigation information; IDLE; there are no satellites visible on this channel.
3. SATELLITE NUMBER- This is the identification number of the satellite being tracked.
4. C/N- C/N is the measure of the satellite's carrier signal to noise ratio. The typical range is 25-
50, the greater the number the better the reception.
5. SYSTEM VARIABLES- The system variables include position dilution of precision (PDOP),
vertical dilution of precision (VDOP), and horizontal dilution of precision (HDOP). The best
possible position dilution of precision measurement is 1.7. A measurement of 6.0 or less indicates
an accurate position solution.
6. RECEIVER STATE- The receiver state will be displayed as COLD START, WARM START,
NAVIGATE, or NOT NAVIGATING. Also, the health of the receiver is displayed.
7. FIGURE OF MERIT- This a calculation of the overall receiver performance, with 1 being the
best and 9 being the worst. The NS 10 requires a figure of merit number of 5 or less to navigate.