Anthony Kremor <[email protected]> writes: > Sorry to post again, just wanted to see if I should be worried about the > range I am getting. I have only performed ground tests so far, LOS as far > as I can tell (it is a highway) but am only getting .4 miles before I can > no longer receive data from the Telemetrum. I am using a 440-7 from Arrow > Antennas. Would my .4 miles on the ground translate to a much higher range > in the air, or should I be going over my setup?
Are you trying to use Monitor Idle, or are you receiving normal telemetry? The former will have dramatically lower range as it is a duplex link and requires successful transmission of every packet to work well. However, as Clay says, the ground environment has a huge impact on range. During rocket tracking, I generally receive the signal just fine until the rocket descends below 10m or so, after which point I do usually need to be within a few hundred yards of the rocket on the ground. That's probably the worst case though, with the airframe containing the antenna lying directly on the ground. Our over-the-ground range testing has always been done with both antennas positioned on hills so that the ground effect between the two stations is minimized. We've successfully received packets at ranges of over 9 miles this way. -keith
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