The only real way to tell if you can connect to Air-Stream or not is to get to the highest point on your property and do a site survey. The equipment required to do this is explained in Equipment to get Started which you may already have. If you are a member there is a stumbling kit* available for loan, or a generous member may be willing to help you out or lend equipment.
A site survey is the process of measuring which microwave signals emitted from Air-Stream Access Servers are accessible from your a handheld antenna and laptop. Also the strength and quality are assesed. Most of the time is is done on your roof. It doesn't take very much time if done properly and will answer the question "Can I join the Air-Stream Network?" once and for all.
*Note: The stumbling kit is available to Air-Stream members. Contact for more details.
South Side Stumbles
Live in the south ?
Contact me for a stumble!
seabird2k (AT) air-stream.org
Most of the time I have a spare dish to scan with :)
Cheers
Seabird2k