Square Kilometre Array and Dish@home
14 Jul 2005 20:18:17 UTC
Topic 189545
(moderation:
Rejoining the discussion from here.... (where I shamelessly hi-jacked the thread.)
Chipper Q...
So I assume that SKA will not be directly detecting GW either. What then would they be using as their detection/measurement reference? Was it in fact essentially as I described?
"No, I'm not a scientist... but I did stay at a Holiday Inn Express."
Square Kilometre Array and Dish@home
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There are nearly 50 scientific papers on what the SKA will be able to do for Astronomy in general. The one I mentioned previously was Strong-Field Tests of Gravity Using Pulsars and Black Holes and this applies specifically to what happens near the source (of GWs) itself. The SKA will use pulsars and their data to create a “Pulsar Timing Array”. These pulsars 'act effectively as the endpoints of arms of a huge, cosmic gravitational wave detector.' The paper's fascinating.
RE: The paper's
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Absolutely
Was thinking: even when the
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Was thinking: even when the dish owner is using the dish for TV, signal data can still be monitored and buffered, to add to (enhance) GRB data as it's collected.
Am guessing: when finely tuned (with reference signals, etc.), the array could also help to provide local meteorological data.
RE: RE: The paper's
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Ditto!!
Awesome! Can do Dish@home 24/7, and won't even have to miss a single episode of Desparate Housewives... err umm... I mean Discovery Channel! ;-b
"No, I'm not a scientist... but I did stay at a Holiday Inn Express."
How about some
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How about some numbers?
Average Dish Size =
Average Dish Effective Collection Area =
Total Number of Dishes per City =
Total Cities =
Dish Density in Rural Areas =
Total Effective Collection Area of Dish@Home Array =
Any suggestions?
Other basic parameters?
Good post by Jan H. Hansen
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Good post by Jan H. Hansen added to the previous thread repeated here:
Differential GPS like WAS
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Differential GPS like WAS improves local relative location accuracy.If you a good postion for the sender of the DGPS/WAS signal then you can drop the relative.
It is not clear to me that by themselves DGPS or WAS improves the time accuracy to the same extent.My understanding of how these enhancements work is that a correcting signal is sent out based on the apparent movement of a fixed station.
One more thing, the local oscillators used inside the receivers must also maintain the same standard of time accuracy.
Oops, I should have been more
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Oops, I should have been more careful. WAS already has the information imbedded to correct for absolute position. Sorry for implying otherwise.
RE: Awesome! Can do
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Chipper.. just remembered that Dish@home would have to point the dishes toward the reference source... probably away from the TV satelite. So no Boincing while watching the boink channels.
"No, I'm not a scientist... but I did stay at a Holiday Inn Express."
RE: Chipper.. just
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I was thinking that the frequencies used by the satellite for TV signals could be ignored by the receiver hardware (while viewing TV). And since all the dishes pointing to a satellite are essentially pointing in different directions in the sky at greater distances (beyond distance to satellite), the data they collect in other frequency bands may help, for example, when gamma ray bursts happen. (This might be superfluous – see “Gamma-ray Burst Real-time Sky Map”)