Cosmic Call
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, Charlie Chafer (CEO) [1] a Texas-based startup, which went out of business in 2004.[2]
Both transmissions were at ~150 kW, 5.01 GHz ( FSK +/-24 kHz).[3]
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),[4] and the Public Part (PP) was sent once (at 2000 bits/s),[4] 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 Stéphane Dumas, BM is the Braastad Message, AM is the Arecibo Message, and ESM is the Encounter 2001 Staff Message.[4]
Each Cosmic Call 2 session in 2003 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, ISR), BIG is Bilingual Image Glossary.[3] All but the PP were transmitted at 400 bits/sec[3]
The ISR was 263,906 bits; BM, 88,687 bits, AM, 1,679 bits; BIG was 12 binary images 121,301 bits; ESM 24899 bits. Total = 500,472 bits for 53 minutes. PP was 220 megabytes and sent at a rate of 100,000 bits/sec for 11 hours total.[3]
Stars targeted
The messages were sent to the following stars:[5]
Name | Designation HD | Constellation | Date sent | Arrival date | Message |
---|---|---|---|---|---|
16 Cyg A | HD 186408 | Cygnus | May 24, 1999 | November 2069 | Cosmic Call 1 |
15 Sge | HD 190406 | Sagitta | June 30, 1999 | February 2057 | Cosmic Call 1 |
HD 178428 | Sagitta | June 30, 1999 | October 2067 | Cosmic Call 1 | |
Gl 777 | HD 190360 | Cygnus | July 1, 1999 | April 2051 | Cosmic Call 1 |
Hip 4872 | Cassiopeia | July 6, 2003 | April 2036 | Cosmic Call 2 | |
HD 245409 | Orion | July 6, 2003 | August 2040 | Cosmic Call 2 | |
55 Cnc | HD 75732 | Cancer | July 6, 2003 | May 2044 | Cosmic Call 2 |
HD 10307 | Andromeda | July 6, 2003 | September 2044 | Cosmic Call 2 | |
47 UMa | HD 95128 | Ursa Major | July 6, 2003 | May 2049 | Cosmic Call 2 |
See also
References
- ↑ Michael Chorost (September 26, 2016). "How a Couple of Guys Built the Most Ambitious Alien Outreach Project Ever, History of Cosmic Calls". Smithsonian.
- ↑ "Archived copy". Archived from the original on 2009-05-15. Retrieved 2009-03-02.
- 1 2 3 4 Richard Braastad, Team Encounter, USA, Alexander Zaitsev, IRE RAS, Russia. "Synthesis and Transmission of Cosmic Call 2003 Interstellar Radio Message". }
- 1 2 3 "Broadcast for Extra-Terrestrial Intelligence from Evpatoria Deep Space Center" Report on Cosmic Call 1999
- ↑ Передача и поиски разумных сигналов во Вселенной
External links
- Self-Decoding Messages
- http://www.activeseti.org/evpatoria.html Discussion of the Call's "Rosetta Stone" and how it was developed
- Report on Cosmic Call
- http://www3.sympatico.ca/stephane_dumas/CETI/evpatoria.html Evpatoria 2003 discussion with bitmap and image