I have done this a few times with the robotics team from my school. The best way to do this is with an RS232 radio. We have used differing brands and qualities (from $2000 to $75). The expensive one was from Motorola and was high baud, two-way, and came in a nice protective shell. It also had a long range. The cheaper one also worked fine, but it was necessary to build a protective case for it, and its range was shorter. It may also have been one-way (unidirectional).
I have to say that this is your best bet, because it doesn't rely on line of sight, doesn't mess with 802.11, and is cheap. Also, because RS232 is the standard for many types of telemetry, it will most likely work with whatever data-gathering equipment you use. It is up to you which model and quality to use, based on your budget and other requirements.
You might check http://tflow.com/boards.html (bottom of page) for a start -- they have prices on their page. These prices are about what to expect anywhere you go. We, however, went through ABACOM Technologies when we got one of our radios (the cheaper, but very functional one). Their webpage is somewhat substandard, so you might not find the RS232 radios on it. I know that they sell them though, and you can call them asking for P/N RTcomTx-RS232 (Transmitter - $87.15 canadian) and RTcomRx-RS232 or (Reciever - $105.52 canadian). There are tons of other places to get it from on the net (digikey *might* have some, but I haven't checked).
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I have to say that this is your best bet, because it doesn't rely on line of sight, doesn't mess with 802.11, and is cheap. Also, because RS232 is the standard for many types of telemetry, it will most likely work with whatever data-gathering equipment you use. It is up to you which model and quality to use, based on your budget and other requirements.
You might check http://tflow.com/boards.html (bottom of page) for a start -- they have prices on their page. These prices are about what to expect anywhere you go. We, however, went through ABACOM Technologies when we got one of our radios (the cheaper, but very functional one). Their webpage is somewhat substandard, so you might not find the RS232 radios on it. I know that they sell them though, and you can call them asking for P/N RTcomTx-RS232 (Transmitter - $87.15 canadian) and RTcomRx-RS232 or (Reciever - $105.52 canadian). There are tons of other places to get it from on the net (digikey *might* have some, but I haven't checked).