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Apollo Lunar Surface Communications Requirements
Does anyone know how many communications circuits the large deployable
parabolic antenna could manage? There were voice, telemetry and video circuits, but how many of each? |
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Apollo Lunar Surface Communications Requirements
On Apr 14, 4:14*am, Alan Erskine wrote:
Does anyone know how many communications circuits the large deployable parabolic antenna could manage? *There were voice, telemetry and video circuits, but how many of each? According to SETI, all sorts of communications (regardless of frequency) can efficiently go to/from Earth, especially to/from that extremely nearby moon, so I'd imagine those fancy NASA/Apollo microwave antennas could manage as much bandwidth as anything we could muster at that time. Of course nowadays a compact, light weight and very energy efficient laser communications beam would be just the ticket, with a focus of roughly 2 km diameter if that were necessary. Otherwise a wider laser beam communicator of something like a hand held cellphone or satellite- phone would be more than sufficient for delivering an extremely wide bandwidth and terrific data throughput. http://groups.google.com/groups/search http://translate.google.com/# Brad Guth, Brad_Guth, Brad.Guth, BradGuth, BG / “Guth Usenet” |
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Apollo Lunar Surface Communications Requirements
On Apr 14, 4:14*am, Alan Erskine wrote:
Does anyone know how many communications circuits the large deployable parabolic antenna could manage? *There were voice, telemetry and video circuits, but how many of each? According to SETI, all sorts of communications (regardless of frequency) can efficiently go to/from Earth, especially to/from that extremely nearby moon, so I'd imagine those fancy NASA/Apollo microwave antennas could manage as much bandwidth as anything we could muster at that time, with very little loss of signal considering the to/from path being perfectly clear. Actually, the vast majority or terrestrial RF/EMF doesn't get outside of our atmosphere, or at least not much past LEO unless it's of microwaves and being directed or focused sufficiently, of which most terrestrial microwaves are not. Of course nowadays a compact, light weight and very energy efficient laser communication beam would be just the ticket, with a focus of roughly 2 km diameter at 384,000 km if that distance were necessary. Otherwise a little wider laser beam communicator of something like a hand held cellphone or satellite-phone configuration would be more than sufficient for delivering an extremely wide bandwidth and terrific data throughput once the extremely narrow channel is established. However, a tightly focused laser cannon method deployed in LEO could get that intended target area down to a couple meters diameter for that same 384,000 km distance. Now that's efficient communications. http://groups.google.com/groups/search http://translate.google.com/# Brad Guth, Brad_Guth, Brad.Guth, BradGuth, BG / “Guth Usenet” |
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