Gps Status Display - Furuno GP-3500 Operator's Manual

2. PLOTTER AND PILOT DISPLAY DESCRIPTION
2.1.5

GPS status display

The GPS status display provides data about the GPS satellites and GEO
satellite (for WAAS).
Receiving signal level
Bars show satellite
signal levels. Satellites
whose signal level
extends 40 are used
to fix position.
DOP value:
SS: SS (Signal Strength) displays a numeric representation of electrical field
strength of the received signal on the selected frequency. The higher the
number the stronger the received signal, and a figure above 60 is normal.
SN: SN (Signal-to-Noise) ratio displays the ratio between the desired signal
and unwanted noise on the selected frequency. The higher the SN ratio the
better the quality of the signal, and a figure above 21 is normal.
2-6
Estimated position of satellite in the sky.
Satellites used for fixing position are circled.
05
01
W
30
SAT
No.
30
21
07
06
11
03
05
12
08
20
28
30
01
123
WAAS satellite (GEO)
GPS status display
DOP stands for Dilution of Precision and is an indication of the
quality of the satellite constellation. The smaller value means the
higher accuracy. (For your reference, the positioning accuracy is
approx. 10 m when the value is less than "4".)
01 : 00 : 15
N
APR 1 2003
08
21
12
GPS 2D
07
20
E
DOP
06
11
28
W
03
ALT
S
SNR
40 50
FREQ
310.0 kHz
SS
75.0 dB
SN
22.0 dB
Appears when the
internal DGPS beacon
receiver is installed.
Time
Date
GPS fix status
DOP value
1. 2
GPS antenna height
12 m
DGPS beacon frequency
Signal strength