4 ms·
It doesn't matter how big your antenna is if Voyager's antenna is no longer facing earth, as seems to have been accidentally induced here.
by arbuge 3y ago
It doesn't matter how big your antenna is if Voyager's antenna is no longer facing earth, as seems to have been accidentally induced here.
- bell-cot 3y agoUntrue, strictly speaking. So long as the combination of your transmitter's power and your antenna's directionality (aka 'gain') provide enough extra dB's of signal strength (to compensate for the dB's "lost" on Voyager's end, due to the off-axis antenna) it'll work fine. OTOH, dB's are effectively a log scale, and NASA's "not good enough now" transmitter & antenna cost quite a few $million. What's your budget? (Yeah - if the Arecibo radio telescope was still on operation, it might well have been capable of doing this.)
- guraf 3y agoI suspect it is true, strictly speaking. In optimal orientation, Voyager's signal peaks at -160dBm when received on the 70m dishes. Now it's shooting 2 degrees off which means the signal misses earth by hundreds of millions of kilometres. What kind of magical high gain antenna do you envision that could still receive it, assuming money isn't a problem?
- bell-cot 3y agoVoyager 2 has a direction radio antenna, not a laser producing a sharp-edged beam. https://en.wikipedia.org/wiki/Voyager_2#Communications https://en.wikipedia.org/wiki/Voyager_2#Communications https://en.wikipedia.org/wiki/Parabolic_antenna#Beamwidth https://en.wikipedia.org/wiki/Parabolic_antenna#Beamwidth How about this antenna? https://en.wikipedia.org/wiki/Very_Large_Array https://en.wikipedia.org/wiki/Very_Large_Array Or this one? https://en.wikipedia.org/wiki/Five-hundred-meter_Aperture_Spherical_Telescope https://en.wikipedia.org/wiki/Five-hundred-meter_Aperture_Sp...