2Slick Posted January 15, 2011 Share Posted January 15, 2011 http://img51.imageshack.us/i/1288h.jpg/ Always curious as to why this sometimes happens. Thanks. Link to comment Share on other sites More sharing options...
Snow Wizard Posted January 15, 2011 Share Posted January 15, 2011 http://img51.imagesh...us/i/1288h.jpg/ Always curious as to why this sometimes happens. Thanks. I have never seen one like that. Just think if that was reality! Link to comment Share on other sites More sharing options...
baroclinic_instability Posted January 15, 2011 Share Posted January 15, 2011 I have never seen anything like that ever. There is obviously something wrong with the algorithm used to plot the graphics. Link to comment Share on other sites More sharing options...
2Slick Posted January 15, 2011 Author Share Posted January 15, 2011 http://www.9wsyr.com/content/weather/livedoppler9_static.aspx It's returned back to normal now, but thought that was weird! Link to comment Share on other sites More sharing options...
A-L-E-X Posted January 15, 2011 Share Posted January 15, 2011 I have never seen anything like that ever. There is obviously something wrong with the algorithm used to plot the graphics. I see a lot of banding Link to comment Share on other sites More sharing options...
snowstormcanuck Posted January 15, 2011 Share Posted January 15, 2011 Environment Canada has a useful list of common radar interpretation errors. http://www.msc-smc.ec.gc.ca/cd/factsheets/weather_radar/index_e.cfm Couldn't find an example of the one above. Link to comment Share on other sites More sharing options...
baroclinic_instability Posted January 15, 2011 Share Posted January 15, 2011 I see a lot of banding Ha, definitely have to watch out for the circular bands of the apocalypse. Bosart and staff at SUNY Albany will have to add a new mesoscale banding type to the list. http://www.atmos.albany.edu/facstaff/celeste/Greenstein.pdf Link to comment Share on other sites More sharing options...
Ed Lizard Posted January 15, 2011 Share Posted January 15, 2011 Cool radar image from the thrilling days of yesteryear... Link to comment Share on other sites More sharing options...
A-L-E-X Posted January 15, 2011 Share Posted January 15, 2011 It's weird but what that actually looks like is when you look at a star through an out of focus reflector telescope. It's purposely done for the purposes of collimation (to align the primary and secondary mirrors)-- and when you see those symmetrical concentric rings, it means the telescope is collimated properly. I dont know what it would mean in the case of radar though. Link to comment Share on other sites More sharing options...
AtticaFanatica Posted January 15, 2011 Share Posted January 15, 2011 It looks like returned power that has only been intermittently corrected for range (which it needs to be to get reflectivity). Link to comment Share on other sites More sharing options...
janetjanet998 Posted January 15, 2011 Share Posted January 15, 2011 http://img51.imagesh...us/i/1288h.jpg/ Always curious as to why this sometimes happens. Thanks. I have seen that before..and if i recall correctly(a BIG if) I think it was on several radars at the same time when i saw it Link to comment Share on other sites More sharing options...
radarman Posted January 15, 2011 Share Posted January 15, 2011 There is obviously something wrong with the algorithm used to plot the graphics. That is almost definitely not a plotting algorithm error. This is probably a radar hardware or less likely but possibly a signal processing error. Do we know if this persisted in the next scan? It looks like returned power that has only been intermittently corrected for range (which it needs to be to get reflectivity). That's possible. And whether it's due to software or hardware is not clear. Given that it was clearly a sudden failure that happened part way through a scan, I'd lean toward hardware, unless of course the next scans were fine. Link to comment Share on other sites More sharing options...
radarman Posted January 15, 2011 Share Posted January 15, 2011 I have seen that before..and if i recall correctly(a BIG if) I think it was on several radars at the same time when i saw it You are a fantastic severe wx poster, but I would be surprised if that was true, unless it was an error related to common NTP software or something similar. Link to comment Share on other sites More sharing options...
radarman Posted January 15, 2011 Share Posted January 15, 2011 I looked on the syracuse news 9 web page and their radar loop is choppy, as in a lot of frames are missing or blank, but interspersed with some good frames. There is almost definitely failing hardware somewhere in the system. Could be with the magnetron/klystron or an oscillator perhaps. Link to comment Share on other sites More sharing options...
Kmlwx Posted January 16, 2011 Share Posted January 16, 2011 http://img51.imagesh...us/i/1288h.jpg/ Always curious as to why this sometimes happens. Thanks. The few times I've seen this the radar in question went down within the hour or two after due to hardware problems. If it had all been solid instead of those bands I would have been tempted to say "test mode" which can cause issues as well if the radar is not taken down before testing begins. Link to comment Share on other sites More sharing options...
janetjanet998 Posted January 16, 2011 Share Posted January 16, 2011 You are a fantastic severe wx poster, but I would be surprised if that was true, unless it was an error related to common NTP software or something similar. ok i remember more now..it was on a national radar map and several stations had that bulls eye shape around the site, i didn't go to each radar site. Link to comment Share on other sites More sharing options...
isohume Posted January 16, 2011 Share Posted January 16, 2011 An 88D RDA algorithm won't produce an artifact like that. It's some problem with the proprietary software used by the provider. Link to comment Share on other sites More sharing options...
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