Underground radio developed.

[Tweek]

This may be of an interest to those restorers still around, a 16 year developed a radio that can be used 1000 feet underground.

http://www.npr.org/templates/story/story.php?storyId=123116417&ft=1&f=1001

Wonder application wise how that would work for the cavern if the KI wasn't used so much.
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Beneath - Journal and archive of my time in D'ni.

[JWPlatt]

1000 feet? That's about 8 miles too short, if you're talking Cavern to surface, and not too far across a number of hoods.
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Perfect speed is being there.

[Tweek]

Should be fine, the cavern is supposed to be about 6 miles by 10, so you'd cover a fairly large area with it.

But from cavern to surface yeah, not actually sure depth wise, I know it's pretty deep, never actually calculated that.

Probably would have come in handy more back in 04 when the DRC pulled out given Laxman reduced the KI features.
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Beneath - Journal and archive of my time in D'ni.

[greendragoon]

Still, this technology could be used in a repeater system. It would require a lot less nodes than a wifi based system. It's a pity we can't tie one of the KI's into a terrestrial system and get the signal through that way. Then you'd have Age transcending wifi.

EDIT: Eh Gads, it's been so long since I've posted, I had forgotten about that signature. I don't think I've updated it since the cavern closure.
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Robert "greendragoon" Starbuck

I come from the surface,
I search through instances, peoples, and ages,
for this place, the Cavern. My Home.

My KI number, I have no KI number.
I am a Writer, lost in the Great Tree.
Link.

[Tweek]

[Mowog]

Agreed, RE: the "repeater" arrangement. Surely one of our technical bods could find a way to set up such radios as relays, thus increasing their range. The KI is a pretty amazing piece of kit, but it does have its limitations.

How about a relay station up on the Great Zero pinnacle? Or would the GZ emissions override the radio signals?

Mowog

[Tai'lahr]

Um, did anyone notice that the kid lives in New Mexico?

In the other thread, Vincent Kingsley suggested that if he were Laxman, he'd have put security sensors near the surface entrance to prevent anyone from wandering into D'ni.

Hmmmm....

[Tweek]

Security sensors at the entrance wouldn't have made much difference. People have Linking Books too either way people will get to the cavern.
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Beneath - Journal and archive of my time in D'ni.

[linkerjpatrick]

Slightly off topic but since my last explorations in the cavern mobile telecommunications on the surface have really advanced. Hope to see a way for some of us wanting to get back to the cavern discreetly to have a KI interface for iPhones, Droids, etc.

I am a little worried however to discover Apple may have aquired some linking book tech..,

http://www.apple.com/ipad/features/


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aka - "Dr. Greer"

[Professor Clarke]

Interesting, indeed. One of the geology team suggested it might better be applied to broadcast signals from inside damaged buildings instead of sending someone in on a risky mission.
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Professor Clarke
Subterranean Restorations
Director of Text Restoration

[Mac_Fife]

I'm surprised there's such a big deal about underground radio and the distances we're talking about. I haven't looked into this in detail, but I'd have thought that much the same principles as are involved with communicating with submarines would apply: Conventionally, radio waves don't pass through water, but if you use ultra low frequency radio you can establish a very reliable, long distance connection. The down side is that with a very low carrier frequency then modulation has to be low frequency too, meaning you can't send high speed digital data for example. A bit like slow scan TV, you need time to build up a message.

The problem with most high frequecy radio systems, like UHF or microwave links is that they're "line-of-sight" - the signal can't go round corners. Use a low frequency, where the wavelength is several tens or hundreds of metres (or more) and the signal can diffract and bend round obstructions, and is less easily absorbed by the surfaces it strikes.
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Mac_Fife (but just call me Mac)

[rarified]

[Madge Millicuddy]

Oh thank goodness y'all are discussing the underground radio. I've got kin, who are radios.

My parts are corroded . Not rusty, because I was discarded in the cavern and nothing rusts down here. Too dry I guess, if I don't get close to the lake water and the gushing waterfalls.

By the way it is so nice to see all of you again. With all the serious AHEM research going on, I know I can bring a small bit of levity to brighten any bleak days ahead.

Love (Happy Valentines Day)

Madge
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My battery is always running out, but if it does, just plug me into the wall and I will recharge in a few hours.

[Mac_Fife]

[Dalken]

Having an emergency radio of any kind wouldn't be a bad idea, really. I mean, with how often the KIs can bug up, at least communications throughout the cavern itself if something causes them to go out would be rather handy.
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~Dalken Starbyne

Unless otherwise stated, opinions expressed are my own and do not reflect the opinion of any organization of which I am a member.