This hint is for people trying to optimise their wireless signal reception in strange places. I recently had to get a wireless network operating over 100 meters away from the base station, and in a metal shed -- not the best environment for microwave communication!
This hint basically does the same job as AP Grapher, but can be run from the command line or over SSH -- so I was able to have someone else carry my MacBook Pro around the shed while I stayed near the wireless router and fiddled with its antennas.
I ssh'd into my MacBook Pro from a computer at the router, and ran the following command in Terminal:
while x=1; do /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | grep CtlRSSI; sleep 0.5; done
Mac OS X Hints
http://hints.macworld.com/article.php?story=20100405162603767