The Wow !! signal was a strong narrowband radio signal detected by Jerry R. Ehman on August 15, 1977, while
he was working on a SETI project at the Big Ear radio telescope of The Ohio State University, then located at
Ohio Wesleyan University's Perkins Observatory in Delaware, Ohio - USA.
The signal bore the expected hallmarks of non-terrestrial and non-Solar System origin.
It lasted for the full 72-second window that Big Ear was able to observe it, but has not been detected again.
Beware the volume, the sound of this video contains high frequency and can damage the eardrums.
The Alien Wow Signal, 72 sec, at 1420.4556 MHz, New View !!!. Aug 1977, UFO Sighting News.
[youtube]OkycNvrpjCs?rel=0[/youtube]
This signal was very sharp, transmitting at only a single frequency. Natural radio sources don’t work like that.
They spread across a range of frequencies, meaning that the same signal covers a broad band of transmission.
The Wow !! signal is not like this at all, showing only one very specific frequency at approximately 1420 MHz.
1420 MHz, also known as the hydrogen line, is a frequency internationally banned from use by terrestrial radio
signals because of its use in radio astronomy.
Astronomically, it’s usually emitted by neutral hydrogen atoms in interstellar space.
It’s observed roughly evenly in all directions, and has been used before to help map out the galaxy.
But in the SETI program, it has another use.
The location of the signal was in the constellation Sagittarius, near the Chi Sagittarii star group.
Because of the design of the experiment, the location may lie in either one of the two red bands, and there
is also significant uncertainty in the declination (vertical axis).
For clarity, the widths of the red bands are not drawn to scale; they should actually be narrower.
Regards.
he was working on a SETI project at the Big Ear radio telescope of The Ohio State University, then located at
Ohio Wesleyan University's Perkins Observatory in Delaware, Ohio - USA.
The signal bore the expected hallmarks of non-terrestrial and non-Solar System origin.
It lasted for the full 72-second window that Big Ear was able to observe it, but has not been detected again.
Beware the volume, the sound of this video contains high frequency and can damage the eardrums.
The Alien Wow Signal, 72 sec, at 1420.4556 MHz, New View !!!. Aug 1977, UFO Sighting News.
[youtube]OkycNvrpjCs?rel=0[/youtube]
This signal was very sharp, transmitting at only a single frequency. Natural radio sources don’t work like that.
They spread across a range of frequencies, meaning that the same signal covers a broad band of transmission.
The Wow !! signal is not like this at all, showing only one very specific frequency at approximately 1420 MHz.
1420 MHz, also known as the hydrogen line, is a frequency internationally banned from use by terrestrial radio
signals because of its use in radio astronomy.
Astronomically, it’s usually emitted by neutral hydrogen atoms in interstellar space.
It’s observed roughly evenly in all directions, and has been used before to help map out the galaxy.
But in the SETI program, it has another use.
The location of the signal was in the constellation Sagittarius, near the Chi Sagittarii star group.
Because of the design of the experiment, the location may lie in either one of the two red bands, and there
is also significant uncertainty in the declination (vertical axis).
For clarity, the widths of the red bands are not drawn to scale; they should actually be narrower.
Regards.
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