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Thread: Reconsidering spy satellites and the reason for the WOW-signal

  1. #1
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    Reconsidering spy satellites and the reason for the WOW-signal

    I reconsidered the WOW-signal yesterday and start wondering what it could be. Until now i've always believed in spy satellites for the explanation on the WOW-signal. But if the signal was 72 seconds long i could not be a spy satellites (unless it was geostationary, but then we would have found it again afterwards).

    Main question: Is this true or am i wrong?

    Interesting reading on the Wiki site:
    http://en.wikipedia.org/wiki/Wow%21_signal

    I've always thought the spy satellite explanation was the best explanation to the WOW-signal we had, but Wiki doesn't mention anything about this. Some other questions and notifications from Wiki:

    1) What does this mean? I don't understand what the writer means with this:
    Also, the 1420 MHz signal is problematic in itself in that it is "protected spectrum" or bandwidth in which terrestrial transmitters are forbidden to transmit.
    2) However, i love this one
    In his most recent writings, Ehman resists "drawing vast conclusions from half-vast data," but after applying Occam's Razor, states than an intelligent extraterrestrial origin for the Wow! signal is the only explanation posited thus far that cannot be ruled out.
    3) Anyone wants to explain this more in details?
    It has been speculated that interstellar scintillation of a weaker continuous signal similar, in effect, to atmospheric twinkling
    4) If we ever encounter a 1420 MHz signal how can we conclude that it is a terrestial signal and not just a signal from a hydrogen cloud?

  2. #2
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    Hydrogen Frequency = 1420.405 MHz

    "1420.356 MHz (J. D. Kraus) and 1420.456 MHz (J. R. Ehman), but both very close to the frequency of the hydrogen line at 1420.405 MHz"

    Which means it couldn't be a hydrogen cloud?

  3. #3
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    Quote Originally Posted by Ingo View Post
    Which means it couldn't be a hydrogen cloud?
    Or it could be a hydrogen cloud at a non-zero velocity.

  4. #4
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    Quote Originally Posted by Sporally View Post
    I reconsidered the WOW-signal yesterday and start wondering what it could be. Until now i've always believed in spy satellites for the explanation on the WOW-signal. But if the signal was 72 seconds long i could not be a spy satellites (unless it was geostationary, but then we would have found it again afterwards).
    Non-geostationary spy satellites can "hover" but joema knows a lot more about it than I do.

  5. #5
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    Yes, i understand that it is close to the hydrogen line and that with some red-/blueshift in its spectrum it can easily be a hydrogen cloud (which i would say is should be a possible explanation). However, i don't understand what they mean with "..."protected spectrum" or bandwidth in which terrestrial transmitters are forbidden to transmit."

  6. #6
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    @ hhEb09'1
    Just saw your post after i posted the last post. I searched Wikipedia's WOW-signal page for the inclination of the WOW-signal but i didn't find it. But i found the declination. Is it just me or isn't inclination how far above the elliptical plane an object is while declination is how far below the elliptical plane so that inclination can be computed from the following information about the WOW-signal?
    Declination (Is the same for both horns): -26d57m +/- 20m
    Maybe this can help determining if it was a Molniya orbiting spacecraft of some type. However, i find it very strange that is was so close to the hydrogen line. How long would it take for a Molniya orbiting spacecraft to pass the field of view of the Big Ear?



    BTW: Did we ever activily search for the WOW-source? I mean, did we send any signals back in the direction of the WOW-source or did we just keep listening afterwards?

    It has also been suggested that the origin of the WOW-signal was communication between two extraterrestial spacecrafts or planets that communicated. If the extraterrestials were a very advanced civilization that lived on two planets or spacecrafts from which Earth got into the line between them (assuming they used laser, which explains why we didn't hear from them again), then they probably wouldn't use the hydrogen line of the spectrum as its universal purpose for any intelligent civilization is to SEARCH for other extraterrestials. They would surely use some other frequency for communication otherwise. In case they'd found another civilization on another planet using some advanced telescope, e.g. by analysing the atmosphere of their planet, why didn't they find any interest in us? We were closer so we should have been found first - but of course there could be many explanations why they were trying to communicate with the other civilization instead of us.

  7. #7
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    Quote Originally Posted by Sporally View Post
    1) What does this mean? I don't understand what the writer means with this:
    Also, the 1420 MHz signal is problematic in itself in that it is "protected spectrum" or bandwidth in which terrestrial transmitters are forbidden to transmit.
    Seti.org: Radio Frequency Interference

    In the "Protected Band" at 1420 MHz
    Through international agreements, several special frequency bands have been reserved for radio astronomy. Perhaps the most important of these bands includes the emission from hydrogen atoms at 1420 MHz. The "protected" band extends from 1400 MHz to 1427 MHz in order to allow observations of hydrogen gas moving at a range of velocities.
    0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 ...
    Skepticism enables us to distinguish fancy from fact, to test our speculations. --Carl Sagan

  8. #8
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    Ah, terrestial transmitters made me think of us and aliens - i didn't recall i've ever heard of us making such an agreement with any aliens Still, it could well be fake transmitting from someone who broke into a system (satellite) that could transmit such a signal, couldn't it?

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