Introduction
As discussed in https://navtechradar.atlassian.net/wiki/spaces/TUN/pages/789839905/Final+Steps#Carriageway-Stats there are fields that show the expected radar coverage for a section of carriageway, as well as the actual radar coverage for the section, pending a healthy radar connection.
This page covers when there are changes to the carriageway coverage status which can also highlight problems with the radar.
Contents
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Healthy Radar Coverage
Here is the map showing a carriageway with a healthy carriageway coverage status for a section.
The Normal Coverage and Current Coverage of the radar for the selected section 19 (which is well within the range of the radar) is showing 100%:
Peripheral Coverage
When sections of the carriageway are situated towards the edge of the radar range, then the coverage may be reduced. Section 15 is near the edge of the radar boundary, and it shows a Normal and Current Coverage of 99.3%:
Coverage Out Of Range
Section 14 is just over the boundary of the radar range and so the normal and current coverage is greatly reduced - both at 0.9%:
Section 13 is out of range of the radar, and therefore not allocated to it. It is therefore expected that the normal and current coverage are at 0.0%.
Exclusion Area
There are other reasons why coverage is not as high as you’d expect; in this scenario, an exclusion area, highlighted in yellow, has been placed within halfway of Section 19, and this excludes any radar data returning from this area, so the Normal and Current Coverage are at 47.4%:
Unhealthy Radar
If the radar status is unhealthy then the radar coverage falls; in the example below it is expected to be at 100% but the Current Coverage is showing as 0.0%:
In addition, the carriageway where the radar is unhealthy, is highlighted in red dashed lines as above.
The coverage status change is reflected in the ICD-001 Carriageway Statistics Report.
Related Information
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