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Mind the gaps

from AVweb

Most pilots have heard warnings about the timeliness (or lack thereof) of Nexrad radar. Better expressed as latency, the weather you see on your tablet, smartphone or multi-function display from providers like SXM or the FAA’s ADS-B could already be 15-20 minutes out of date. It can't be said enough: What you see on your Nexrad display is better described as a historical record and has little to do with what’s happening right now. Less often discussed — or warned about — are the radar gaps, the places where there is only a partial picture. more

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