We had two kinds of problems with using our USB wi-fi adapters for
telemetry at our last launch: electrical issues with USB, and regulatory
limits we didn't understand on our 802.11a channel selection. Andrew et
al seem to have solved the electrical issues, and our antenna is tuned
for a different channel than we intended, which turns out to sidestep
the regulatory issues.

In case we want to try the higher channels again later, though, here's
background on the issues with channels that require "Dynamic Frequency
Selection":

http://lwn.net/Articles/420623/

Linux support is apparently in progress; you can check the status here:

http://wireless.kernel.org/en/developers/DFS

Jamey

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