GE MDS Mercury Series, Reference Manual

Page: 115 / 196

05-4446A01, Rev. C Mercury Reference Manual 107
GPS Status Menu
Invisible place holder
Figure 3-77. GPS Status Menu
•
GPS Serial Number
—The serial number of the GPS unit in the
radio.
•
GPS Firmware Version
—The firmware version running on the
GPS chip.
•
Satellite Fix Status
—Indicates whether or not the unit has
achieved signal lock with the minimum required number of
GPS satellites. The transceiver requires a fix on five satellites to
achieve Precise Positioning Service (PPS) and four to maintain
PPS. [
No Fix, Fix
]
•
Number of Satellites
—Shows the number of GPS satellites
received by the transceiver. Although there are typically 24
active GPS satellites orbiting the Earth twice a day, only a sub-
set of these is “visible” to a receiver at a given location. A good
signal provides information from six to ten satellites.
•
Latitude
—Shows the transceiver’s latitudinal location (in
degrees), based on GPS data received from the satellites.
•
Longitude
—Shows the transceiver’s longitudinal location (in
degrees), based on GPS data received from the satellites.
•
Altitude
—Shows the transceiver’s altitude above sea level (in
feet), based on GPS data received from the satellites.
•
GPS Information
—Shows data about the individual satellites
being received, including the Pseudo-Random Noise (PRN)
code (a unique bit stream for each satellite), the satellite’s ele-
vation (in degrees), azimuth (in degrees), and the sig-
nal-to-noise ratio of the carrier signal (SNR). Figure 3-78 on
Page 108 shows a layout example for this screen.