Radar Question
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Riding a motorbike, I often pay close attention to the radar images of cloud cover provided by the weather services. If anyone here knows anything about radar, maybe you can answer my question. Often, on the images, there are narrow sectors (literal, geometric sectors, capped by arcs) of the radar circle that are shaded, indicating cloud, where there is no cloud outside of these sectors. These sectors often extend over the full radius of the circle, making it appear as if something is obstructing the radar at the centre, and making it think the density it sees close up extends forever outwards. However, the radar image is normally capable of indicating that clouds close to the centre in fact do end further out, and it gets these shapes right.
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Riding a motorbike, I often pay close attention to the radar images of cloud cover provided by the weather services. If anyone here knows anything about radar, maybe you can answer my question. Often, on the images, there are narrow sectors (literal, geometric sectors, capped by arcs) of the radar circle that are shaded, indicating cloud, where there is no cloud outside of these sectors. These sectors often extend over the full radius of the circle, making it appear as if something is obstructing the radar at the centre, and making it think the density it sees close up extends forever outwards. However, the radar image is normally capable of indicating that clouds close to the centre in fact do end further out, and it gets these shapes right.
More than you probably ever wanted to know[^]. I would guess those are regions where the amount of signal return is just over the threshold to indicate cloud mass. The neighboring sectors are just below the threshold. It could also be clutter, causing a false return.
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Riding a motorbike, I often pay close attention to the radar images of cloud cover provided by the weather services. If anyone here knows anything about radar, maybe you can answer my question. Often, on the images, there are narrow sectors (literal, geometric sectors, capped by arcs) of the radar circle that are shaded, indicating cloud, where there is no cloud outside of these sectors. These sectors often extend over the full radius of the circle, making it appear as if something is obstructing the radar at the centre, and making it think the density it sees close up extends forever outwards. However, the radar image is normally capable of indicating that clouds close to the centre in fact do end further out, and it gets these shapes right.
Hi Brad, this is an interference with WLAN in the 5 GHz band. This is known and WLAN access points in the 5 GHz range have to change the channel when they detect a radar in their range. The problem is getting worse as more and more access points use the 5 Ghz frequency. Josef
Josef Schroettle
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Hi Brad, this is an interference with WLAN in the 5 GHz band. This is known and WLAN access points in the 5 GHz range have to change the channel when they detect a radar in their range. The problem is getting worse as more and more access points use the 5 Ghz frequency. Josef
Josef Schroettle
Sounds like someone who knows what they are talking about, rather than the mumbling guess and lame wikipedia link I provided. Thanks.
Software Zen:
delete this;
Fold With Us![^]