Cosmic Call

RT-70 in Yevpatoria

Cosmic Call was the name of two sets of interstellar radio messages that were sent from RT-70 in Yevpatoria, Crimea in 1999 (Cosmic Call 1) and 2003 (Cosmic Call 2) to various nearby stars. The messages were designed with noise-resistant format and characters.

The project was funded by Team Encounter, a Texas-based startup that went out of business in 2004.[1]

Both transmissions were at ~150 kW, 5.01 GHz (FSK +/-24 kHz).[2]

Message structure

Each Cosmic Call 1 session had the following structure. The Scientific Part (DDM, BM, AM, and ESM) was sent three times (at 100 bits/s,[3] and the Public Part (PP) was sent once (at 2000 bits/s),[3] according to the following arrangement:

DDM BM AM ESM DDM BM AM ESM DDM BM AM ESM PP,

where DDM is the Dutil-Dumas Message, created by Canadian scientists Yvan Dutil and Stephane Dumas, BM is the Braastad Message, AM is the Arecibo Message, and ESM is the Encounter 2001 Staff Message.[3]

Each Cosmic Call 2 session had the following structure:

DDM2 DDM2 DDM2 AM AM AM BIG BIG BIG BM ESM PP,

where DDM2 is modernized DDM (aka Interstellar Rosetta Stone), BIG is Bilingual Image Glossary.[2] All but the PP were transmitted at 400 bits/sec[2]

Stars targeted

The messages were sent to the following stars:[4]

Name Designation HD Constellation Date sent Arrival date Message
16 Cyg A HD 186408 Cygnus May 24, 1999 November 2069Cosmic Call 1
15 Sge HD 190406 Sagitta June 30, 1999 February 2057Cosmic Call 1
HD 178428 Sagitta June 30, 1999 October 2067Cosmic Call 1
Gl 777 HD 190360 Cygnus July 1, 1999 April 2051Cosmic Call 1
Hip 4872 Cassiopeia July 6, 2003 April 2036Cosmic Call 2
HD 245409 Orion July 6, 2003 August 2040Cosmic Call 2
55 Cnc HD 75732 Cancer July 6, 2003 May 2044Cosmic Call 2
HD 10307 Andromeda July 6, 2003 September 2044Cosmic Call 2
47 UMa HD 95128 Ursa Major July 6, 2003 May 2049Cosmic Call 2

See also

References

  1. ↑ "Archived copy". Archived from the original on 2009-05-15. Retrieved 2009-03-02.
  2. 1 2 3 Synthesis and Transmission of Cosmic Call 2003 Interstellar Radio Message.
  3. 1 2 3 "Broadcast for Extra-Terrestrial Intelligence from Evpatoria Deep Space Center" Report on Cosmic Call 1999
  4. ↑ Передача и поиски разумных сигналов во Вселенной

External links

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