Quantum provides several indicators and displays that help in checking the status and health of L-band corrections. These displays might differ slightly between hardware, for example, it will display L-band information from one source when connected to an LD8, and two different sources when connected to an LD900. The number of indicators may also vary depending on the size of the display panel.
Correction Link Status
The Correction Link Status panel provides high level information regarding various aspects of the L-band corrections in use.
It has four colour-coded radio button indicators: Enabled, Locked, Sync and Signal Strength,which show the health of the L-band beam being used (Auto/single beam shown on the left of the panel), where green indicates a healthy status. If a single beam has been manually selected, it also shows the Azimuth and Elevation of the satellite.
|L-band tracked and healthy||L-band not tracked nor healthy|
More information on the Correction Link Status indicators can be seen in the table below:
|L-band satellite in use||Name of the L-band correction satellite in use e.g. AUTO or 25E|
Signal strength of the selected L-band satellite.Thresholds:
|Azimuth & Elevation||
Azimuth and elevation information for the active L-band correction
Correction Link Signal Strength
Another useful panel for reviewing the quality is Correction Link Signal Strength. This is a fuel gauge type view which provides real-time L-band signal strength indication. The view is colour-coded to give a clear visual indication if the signal strength is acceptable, where the green zone indicates a healthy L-band signal strength.
Correction Link Signal Strength – Time Series
The Correction Link Signal Strength – Time Series view also shows a graphical plot of the L-band signal strength over the previous 10 minutes. Ideally, this should show a constant L-band strength of over 40dB.
The Correction Age view shows a breakdown of the L-band corrections which the VERIPOS receiver is enabled for and receiving data from. This view can be used to monitor the correction age for all corrections types via colour coding. The symbols have three colour states based on the current correction age. Correction types that the VERIPOS receiver is not enabled for are indicated by a grey icon with a cross.
LD8 enabled for APEX5, Ultra2 and Standard2
LD900 enabled for APEX2, Ultra2 and Standard2
The table below details the default correction age range which determine the colour of the status icons for each correction service:
|VERIPOS service||Correction age (seconds)|
|APEX & Ultra||0 – 179||180 – 359||≥ 360|
|Standard||0 - 79||80 - 119||≥ 120|
The Correction Latency view shows the time left for the L-band corrections before timing out. It provides a dynamic display of the correction age (latency). The correction latency bars are colour-coded depending on their values which are displayed in seconds above each bar.
By default, the latency bars will count down from their maximum allowable latency value. This makes it clear to the user exactly how long they have until that particular solution will timeout (when latency indicator bar reaches zero).
The table below details the default correction latency range which determine the colour of the status icons for each correction service:
|VERIPOS service||Correction latency (seconds)|
|APEX & Ultra||360 - 181||180 - 1||≤ 0|
|Standard||120 - 41||41 - 0||≤ 0|
Service Correction Availability
The Service Correction Availability view displays information regarding the availability of correction data for each VERIPOS service. The type of information differs between APEX/Ultra and the Standard service.
For Apex and Ultra solutions, the number of GNSS satellites with correction data is displayed in green numbers. GNSS satellites which have no correction data available are displayed in red numbers.
For VERIPOS Standard solutions, the view shows how many reference stations are used for the corrections. The Standard solution will use a maximum of 6 reference stations even if there are more reference stations within range.
Correction Link Satellites
The Correction Link Satellites view displays all L-band correction satellites (using a satellite symbol) which have an elevation of greater than 0° at the user’s location.
The polar plot view shows the approximate elevation and azimuth to the correction satellite at the current location. The selected correction satellite will be denoted with the largest satellite symbol.