Geoff Hendrick <[email protected]> writes: > I saved this comment a while ago but cant remember where i saw it: > "Tests performed at Altus Metrum have shown that a 3-element yagi antenna > yields good telemetry from rockets to 20 Km (65,600 feet) altitude, and > that a 11-element yagi antenna can receive telemetry from the TeleMetrum to > around 100 Km (62 miles)"
These numbers were extrapolated from signal strength measurements on actual flights. The highest actual flight I'm aware of so far that we've got in our flight database was Adrian Adamson's L single-motor record shot which went to something over 31k feet AGL. The recorded telemetry file shows good reception through apogee. I'm not sure what the ground station antenna was, but I'd guess a 5-element Arrow yagi. Bdale
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