Editing NEXRAD (section)

=== AVSET ===
When the NEXRAD system was initially implemented, the radar automatically scanned all scan angles in a Volume Coverage Pattern, even if the highest scan angles were free of precipitation. As a result, in many cases when severe weather was farther from the radar site, forecasters could not provide as timely severe weather warnings as possible. The Automated Volume Scan Evaluation and Termination (AVSET) algorithm<ref>{{Cite web|url=https://www.roc.noaa.gov/wsr88d/PublicDocs/NewTechnology/Automated_VCP_Evaluation_and_Termination_Update_2012.pdf|title=Automated Volume Scan Evaluation and Termination (AVSET)|website=National Weather Service|access-date=March 7, 2017}}</ref> helps solve this problem by immediately ending the volume scan when precipitation returns at higher scan angles drop below a set threshold (around 20 dBZ). This can often allow for more volume scans per hour, improving severe weather detection without the need for hardware upgrades<ref>{{cite web|url=http://thevane.gawker.com/this-one-little-programming-tweak-will-save-thousands-o-1592764166 |title=This One Little Programming Tweak Will Save Thousands of Lives |date=June 18, 2014 |website=The Vane |publisher=[[Gawker|Gawker Media, LLC]] |author=Dennis Mersereau |access-date=June 18, 2014 |url-status=dead |archive-url=https://web.archive.org/web/20140619184002/http://thevane.gawker.com/this-one-little-programming-tweak-will-save-thousands-o-1592764166 |archive-date=June 19, 2014 }}</ref><ref>{{Cite web|url=https://www.roc.noaa.gov/wsr88d/Images/NewTechnology/20111116_rah_avset_experience.pdf|title=Use of AVSET at RAH during the 16 November 2011 Tornado Event|website=National Weather Service|access-date=March 7, 2017}}</ref> AVSET was initially deployed in RPG build 12.3, in Fall of 2011.