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View Full Version : Lone Signal: First Continous Message Beacon to Find and Say Hello to an Extraterrestr



Fraser
2013-Jun-12, 01:20 AM
Although scientists have been listening for years to search for indications of other sentient life in the Universe, just a few efforts have been made by humans to purposefully send out messages to the cosmos. Called METI (Messaging to Extraterrestrial Intelligence) or Active SETI (Search for Extraterrestrial Intelligence), these messages have so far been just [...]

More... (http://www.universetoday.com/102844/lone-signal-first-continous-message-beacon-to-find-and-say-hello-to-an-extraterrestrial-civilization/)

NEOWatcher
2013-Jun-12, 12:22 PM
Any message from anyone on the internet? We're doomed.

They better have some moderation in place.

neilzero
2013-Jun-12, 03:38 PM
I'll be tenth out of 15 responses that are strongly negative. By sending to this star we are deciding for the next generation as the response by ET, if any, cannot be sooner than 35 years, and there is no upper limit on how bad the response could be, but benefits are likely to be mostly play toys for the rich and middle class such as better Ipods.
If the radio telescope and transmitter uses 100,000 watts 24/7, the electricity costs about $10 per hour. Does anyone know the type of modulation? Pulse position modulation has some advantages when the star is not close to the horizon. Spread spectrum has some advantages, but ET is unlikely to detect spread spectrum and even less likely to demodulate it = you need to know the demodulation algorithm.
The message that is sent will be detectable with a modest antenna perhaps for hundreds of miles, so we will see if communications and incription engineers (without clues) can guess our message. ET has the added handicaps, of not human and unlikely that the signal to noise ratio is acceptable.
Judging from what I have seen on the internet, the average message needs to be edited, if not deleted, if the purpose is to give ET a good impression of Earth's culture. Neil