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Lone Signal
Lone Signal is a crowdfunded active SETI project designed to send messages from Earth to an extraterrestrial civilization. Founded by businessman Pierre Fabre and supported by several entrepreneurs, Lone Signal is based at the Jamesburg Earth Station in Carmel, California. The project's beacon, which commenced continuous operations on June 17, 2013, transmits short, 144-character messages by citizens of Earth to the red dwarf star Gliese 526, located 17.6 light-years away from Earth in the constellation Boötes. In time, the Lone Signal team hopes to earn million to construct a network of dishes across the Earth's surface, beaming messages to many regions of the Milky Way galaxy.〔
==Message components==
Lone Signal's message consists of two key components, a background hailing component and a more complex message component. The hailing component, designed by planetary scientist Michael W. Busch, uses a universal binary encoding system, which goes through an octal intermediary, representing numbers, mathematical operators, or other symbols. Each value corresponds to a single unique frequency. The offsets between those frequencies are set to be much larger than the bit rate (i.e. if transmitting at 100 Hz, the offsets between adjacent frequencies will be ~300 Hz).〔 Using these code blocks, coherent mathematical statements about the laws of physics and Earth's location in the galaxy are produced. The hailing message repeats on average three times in order to allow the recipient to decode it at any time when observation begins, with some parts repeating more often than others. The hailing component was designed to be easily decoded by an extraterrestrial civilization, which was confirmed by a double-blind experiment.〔
The hailing component is not an end in itself, but is designed to be a "Rosetta Stone" toward understanding the more complex message component, consisting of brief, 144-character statements by the general public. These messages, with widely varying languages and contents, are posted from the Lone Signal website.〔 Individuals who have signed up to send messages with Lone Signal, collectively known as the "beaming community", are permitted to send one message for free, and thereafter are required to purchase "message credits" in order to fund the operation of the project. The content of messages sent via Lone Signal may be syndicated to the Twitter and Facebook accounts of beaming community members as desired. It is in this beaming community user space that an attempt is being made to extend the syntax used in the hailing message to communicate in a way that, while neither mathematical nor strictly logical, is nonetheless understandable given the prior definition of terms and concepts in the hailing message.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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