Reviewing the GNSS Reference Status
To view the current status of your GNSS reference:
- Navigate to INTERFACES > REFERENCES: GNSS Reference.
- Click the INFO button next to GNSS 0. The GNSS 0 status window will display; it contains two tabs, explained in detail below: Main [= default], and Satellite Data.
Under the Main tab, the following information will display:
Note: Detailed information on the different parameters can be found in the subsequent GNSS topics.
- Manufacturer/Model: The manufacturer and/or model of the GNSS receiver in your NetClock unit.
- Validity: Status indicator lights for TIME and 1PPS signals: “On” (green) indicates a valid signal, “Off” (red) indicates that no valid signal is available.
A yellow 1PPS light indicates that the monitored 1PPS value fell below a quality threshold and the unit is in flywheel mode (for more information, see Reference Monitoring: Phase).
- Receiver Mode:
- Single Satellite: Used in areas with poor GNSS reception.
- Standard: Default operating mode for the GNSS receiver.
- Mobile: For non-stationary applications.
- Receiver Dynamics: (u-blox receivers only); see Select a setting and click Submit..
- Survey Progress: Real-time status:
- ACQUIRING (x Satellites)—red
- SURVEYING (x %)—yellow; remains at 1% if no satellites are in view
- Number of Tracked Satellites: The number of satellites currently being tracked.
- Offset: As set by the user, in nanoseconds.
- Antenna Sense:
- OK (green)
- Open: Check the antenna for the presence of an open.
- Short: Check the antenna for the presence of a short circuit.
- Position: NetClock’s geographic position by:
- Latitude: In degrees, minutes, seconds
- Longitude: In degrees, minutes, seconds
- Altitude: In meters MSL (Mean Sea Level)
- Receiver Constellation: GPS/GLONASS/
- Client A-GPS Status: A-GPS is ENABLED and running, or DISABLED
- Client A-GPS Data: External A-GPS data is AVAILABLE, or UNAVAILABLE
- Identified Satellite Signal Strengths: Bar graphs for all satellites detected. Color indicates signal strength.
With your mouse pointer, hover over a bar graph to display tool tip information about satellite constellation, satellite number, and signal strength.
|Letter Symbol||GNSS Constellation|
Under the Satellite Data tab, there are two graphs:
- Number of Satellites over Time: A graphical track of how many satellites were being tracked over time.
- SNR over Time: A graphical track of maximum SNR, and minimum SNR.
In both graphs, to see a legend of the graphical data, and time-specific status data, click inside the graph, choosing the desired point in time. If necessary, increase the time resolution by dragging the time sliders. A pop-up window will display the legend for that graph, and the status information for the selected time.