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Honey, the baby's spacewalking...

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Conundrum
Sat Jun 16 2007, 01:56PM Print
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Link2

ROFL!!!! "The manufacturers say that the baby monitor is *supposed* to have a range of 150 feet.

Well, I suppose that if the atmospherics were right you could just *barely* pick up a signal from the ISS, but IIRC they don't operate anywhere near 2.4 GHz for good reason.

-A
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J. Aaron Holmes
Sat Jun 16 2007, 02:32PM
J. Aaron Holmes Registered Member #477 Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
I think the 150ft range is referring to the transmitter, not the receiver. If the shuttle astronauts could hear your baby, that would be another story smile
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Dave Marshall
Sun Jun 17 2007, 06:04AM
Dave Marshall Registered Member #16 Joined: Thu Feb 02 2006, 02:22PM
Location: New Wilmington, PA
Posts: 554
Actually, a significant portion of satellites, particularly geostationary birds DO use 2.4Ghz links. Several of the amateur radio birds offer either an uplink or downlink (but never both) on 2.4Ghz.

Also, I routinely hear various LEO satellites around the same altitude as the ISS that are whispering at the earth with only 250-350mW into a not-very directional antenna. I can take my hand held radio outside on any night and hear atleast a couple. LOS communications with orbital objects can be astoundingly effective in the VHF and UHF bands. Howeve,r i don't think thats the case here.

I have a more plausible theory as to the reception of the video. Given the recent trouble with computers aboard the ISS, I'd speculate that there are some TV networks that have virtually constant video feeds, in hopes (yes hopes, this is the media we're talking about) that something will go wrong and they'll get some exclusive. Its possible she's picking up a rebroadcast feed over a local TV networks microwave link.

The fact that the antenna is almost perfectly wrong for receiving signals from an orbital transmitter (its got a significant null pointing straight up, and probably seriously crappy gain above about 50 degrees) would strongly suggest its a terrestrial signal.

Dave
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Conundrum
Sun Jun 17 2007, 11:13AM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Hmm. Interesting Dave.

Wonder if this might have anything to do with the random Wi-fi dropouts various people over here have been reporting. Or is it more likely to be the leaky microwave ovens...

A
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