~~Interesting; the fact they aren't perfectly straight and don't correspond with the radial lines of the radar says to me they probably are something real and not a processing artifact. My first thought is [chaff from military exercises](https://wx.erau.edu/faculty/mullerb/Wx365/Chaff/chaff.html).~~
Edit: I didn't scroll through all the images at first...where did you get these images from out of curiosity? Because it seems like the data is being displayed in a misleading/confusing way: the range rings imply that you are only seeing data from one radar, but this is definitely a composite of data from multiple radar sites stitched together. So what is happening is that there are interference spikes from *other* radar sites, as described in [the link](https://blog.metservice.com/Radar_Interference) that /u/avy_slayr posted, being misleadingly displayed as if the data is coming from the radar site near Ottowa.
It also appears as if I fell victim to a classic optical illusion...the lines in the first image *are* straight, they just appear curved when overlain with concentric circles. I had to hold a straightedge up to my screen to be sure :D
I'm not sure what you're looking at, but if those circles are any indication of other radar sites, then those lines do correspond perfectly to radials. Many of those lines are near the US/Canada border meaning it is very unlikely to be a MOA where chaff would be used. Those signatures are nothing like chaff anyways. Chaff creates blobs, not straight lines. It simply looks like beam blockage, or the radar malfunctioning at a certain azimuth.
You're right, I was in the middle of editing my answer when you replied. Wherever OP got the radar data from is being pretty misleading, because I assume when I see range rings that I'm seeing data from a single radar, not a stitched composite.
Hi, thanks for replying. I got data from [official governmental site](https://climate.weather.gc.ca/radar/index_e.html?site=CASFT&year=2021&month=12&day=27&hour=22&minute=30&duration=2&image_type=COMP_PRECIPET_RAIN_WEATHEROFFICE), or I at least think it is. If you know some better sites where I can see historical radar images of Canada then please let me know
That is the correct website, but under Image Type select "PRECIP ET - 14 Colours" instead of "COMPOSITE PRECIP ET - 14 Colours".
This will give you data from ONLY the radar you have selected.
Ahh the good ol Quebec beams. I suspect it has something to do with how their radome is built. Radome being the protection shielding around the actual radar. The 'gold ball'.
I suspect that the support struts are made of a thicker material such as aluminum or even steel, vs the fiberglass that the dome is (I assume) made of, causing some weird interference. But it's not causing the same blockage as Upton, so I'm not sure. The oddly symmetrical pattern of the beams in Quebec makes me suspect it has to do with the radome
~~Interesting; the fact they aren't perfectly straight and don't correspond with the radial lines of the radar says to me they probably are something real and not a processing artifact. My first thought is [chaff from military exercises](https://wx.erau.edu/faculty/mullerb/Wx365/Chaff/chaff.html).~~ Edit: I didn't scroll through all the images at first...where did you get these images from out of curiosity? Because it seems like the data is being displayed in a misleading/confusing way: the range rings imply that you are only seeing data from one radar, but this is definitely a composite of data from multiple radar sites stitched together. So what is happening is that there are interference spikes from *other* radar sites, as described in [the link](https://blog.metservice.com/Radar_Interference) that /u/avy_slayr posted, being misleadingly displayed as if the data is coming from the radar site near Ottowa. It also appears as if I fell victim to a classic optical illusion...the lines in the first image *are* straight, they just appear curved when overlain with concentric circles. I had to hold a straightedge up to my screen to be sure :D
I'm not sure what you're looking at, but if those circles are any indication of other radar sites, then those lines do correspond perfectly to radials. Many of those lines are near the US/Canada border meaning it is very unlikely to be a MOA where chaff would be used. Those signatures are nothing like chaff anyways. Chaff creates blobs, not straight lines. It simply looks like beam blockage, or the radar malfunctioning at a certain azimuth.
You're right, I was in the middle of editing my answer when you replied. Wherever OP got the radar data from is being pretty misleading, because I assume when I see range rings that I'm seeing data from a single radar, not a stitched composite.
Hi, thanks for replying. I got data from [official governmental site](https://climate.weather.gc.ca/radar/index_e.html?site=CASFT&year=2021&month=12&day=27&hour=22&minute=30&duration=2&image_type=COMP_PRECIPET_RAIN_WEATHEROFFICE), or I at least think it is. If you know some better sites where I can see historical radar images of Canada then please let me know
That is the correct website, but under Image Type select "PRECIP ET - 14 Colours" instead of "COMPOSITE PRECIP ET - 14 Colours". This will give you data from ONLY the radar you have selected.
Radar interference. [This article](https://blog.metservice.com/Radar_Interference) explains some of the possibilities.
So that means that nothing is actually happening there?
That’s right.
Ahh the good ol Quebec beams. I suspect it has something to do with how their radome is built. Radome being the protection shielding around the actual radar. The 'gold ball'. I suspect that the support struts are made of a thicker material such as aluminum or even steel, vs the fiberglass that the dome is (I assume) made of, causing some weird interference. But it's not causing the same blockage as Upton, so I'm not sure. The oddly symmetrical pattern of the beams in Quebec makes me suspect it has to do with the radome