Jon Woellhaf wrote:

Several posters have stated that NEXRAD images displayed on the Garmin 396
are five or more minutes old because that's how long it takes for the images
to be processed before they're sent to the XM satellite.

What kind of processing could possibly take five minutes? I suspect
whomever's in control of the processing is introducing the delay so they can
sell seconds old data as a premium service.

As far as I can figure out, the Nexrad updates on the www.nws.noaa.gov
occur every few minutes.

Wouldn't it require a whole lot more bandwidth to see a Nexrad site near
real time?