Cosmic Call
{{Short description|Interstellar radio messages sent to nearby stars in 1999 and 2003}}
File:Vitino, RT-70 radio telescope (planetary radar, space exploration radar), Crimea.jpg in Yevpatoria]]
Cosmic Call was the name of two sets of interstellar radio messages that were sent from RT-70 in Yevpatoria, Ukraine in 1999 (Cosmic Call 1) and 2003 (Cosmic Call 2) to various nearby stars. The messages were designed with noise-resistant format and characters.{{Cite book |last=Oberhaus |first=Daniel |url=https://books.google.com/books?id=-CWzDwAAQBAJ |title=Extraterrestrial Languages |date=2019-09-27 |publisher=MIT Press |isbn=978-0-262-35527-8 |pages=99–104 |language=en |oclc=1142708941 }}Dumas, Stéphane; [https://www.plover.com/misc/Dumas-Dutil/messages.pdf The 1999 and 2003 messages explained, 2005]
The project was funded by Team Encounter,{{cite journal |url=http://www.smithsonianmag.com/science-nature/how-couple-guys-built-most-ambitious-alien-outreach-project-ever-180960473/?no-ist |title=How a Couple of Guys Built the Most Ambitious Alien Outreach Project Ever, History of Cosmic Calls |first=Michael |last=Chorost |journal=Smithsonian |date=September 26, 2016 }} a Texas-based startup, which went out of business in 2004.{{cite web |url=http://cs.astronomy.com/asycs/forums/p/17428/295175.aspx |title=Team Encounter Mission: What Happened? |website =Astronomy.com Forums |access-date=2009-03-02 |url-status=dead |archive-url=https://web.archive.org/web/20090515102750/http://cs.astronomy.com/asycs/forums/p/17428/295175.aspx |archive-date=2009-05-15 }}
Both transmissions were at ~150 kW, 5.01 GHz (FSK +/-24 kHz).{{cite web |url=http://www.cplire.ru/html/ra&sr/irm/CosmicCall-2003/index.html |title=Synthesis and Transmission of Cosmic Call 2003 Interstellar Radio Message |first1=Richard |last1=Braastad (Team Encounter, USA) |first2=Alexander |last2=Zaitsev (IRE RAS, Russia) }}
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 bit/s),[http://www.cplire.ru/html/ra&sr/irm/report-1999.html "Broadcast for Extra-Terrestrial Intelligence from Evpatoria Deep Space Center" Report on Cosmic Call 1999] and the Public Part (PP) was sent once (at 2000 bit/s), according to the following arrangement:
:DDM → BM → AM → ESM → DDM → BM → AM → ESM → DDM → BM → AM → ESM → PP,
where DDM is the [https://www.plover.com/misc/Dumas-Dutil/messages.pdf Dutil-Dumas Message],{{cite web |url=http://www3.sympatico.ca/stephane_dumas/CETI/evpatoria_2003.txt | title=Bitmap |access-date=2021-09-22 |url-status=dead |archive-url=https://web.archive.org/web/20070512200908/http://www3.sympatico.ca/stephane_dumas/CETI/evpatoria_2003.txt |archive-date=2007-05-12 }}{{cite web |url=http://www3.sympatico.ca/stephane_dumas/CETI/evpatoria_2003.jpg |title=Image |access-date=2021-09-22 |url-status=dead |archive-url=https://web.archive.org/web/20120114080707/http://www3.sympatico.ca/stephane_dumas/CETI/evpatoria_2003.jpg |archive-date=2012-01-14 }} 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.
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. All but the PP were transmitted at 400 bit/s
The ISR was 263,906 bits; BM, 88,687 bits, AM, 1,679 bits; BIG was 12 binary images 121,301 bits; ESM 24,899 bits. Total = 500,472 bits for 53 minutes. PP was 220 megabytes and sent at a rate of 100,000 bit/s for 11 hours total.
Error in Cosmic Call 1
The DDM incorrectly states the neutron mass as 1.67392... instead of the known value 1.67492... This error was corrected in DDM2.
Stars targeted
The messages were sent to the following stars:{{Cite web |url=http://www.cplire.ru/rus/ra%26sr/VAK-2004.html |title=Передача и поиски разумных сигналов во Вселенной |access-date=2009-02-22 |archive-date=2012-02-10 |archive-url=https://web.archive.org/web/20120210090149/http://www.cplire.ru/rus/ra%26sr/VAK-2004.html |url-status=dead }}
| class="wikitable" | |||||
| Name
! Designation HD ! Constellation ! Date sent ! Arrival date ! Message | |||||
|---|---|---|---|---|---|
| align=center
| 16 Cyg A | HD 186408 | Cygnus | May 24, 1999 | November 2069 | Cosmic Call 1 |
| align=center
| 15 Sge | HD 190406 | Sagitta | June 30, 1999 | February 2057 | Cosmic Call 1 |
| align=center
| | HD 178428 | Sagitta | June 30, 1999 | October 2067 | Cosmic Call 1 |
| align=center
| Gl 777 | HD 190360 | Cygnus | July 1, 1999 | April 2051 | Cosmic Call 1 |
| align=center
| GJ 49 | HIP 4872 | Cassiopeia | July 6, 2003 | April 2036 | Cosmic Call 2 |
| align=center
| GJ 208 | HD 245409 | Orion | July 6, 2003 | August 2040 | Cosmic Call 2 |
| align=center
| 55 Cnc | HD 75732 | Cancer | July 6, 2003 | May 2044 | Cosmic Call 2 |
| align=center
| | HD 10307 | Andromeda | July 6, 2003 | September 2044 | Cosmic Call 2 |
| align=center
| 47 UMa | HD 95128 | Ursa Major | July 6, 2003 | May 2049 | Cosmic Call 2 |
See also
References
{{reflist}}
External links
{{Library resources box}}
- [https://www.fourmilab.ch/goldberg/setimsg.html Self-Decoding Messages]
- [https://web.archive.org/web/20110724223524/http://www.activeseti.org/evpatoria.html Discussion of the Call's "Rosetta Stone" and how it was developed]
- [http://www.cplire.ru/html/ra&sr/irm/report-1999.html Report on Cosmic Call]
- [https://web.archive.org/web/20121001045355/http://www3.sympatico.ca/stephane_dumas/CETI/evpatoria.html Evpatoria 2003 discussion with bitmap and image]
{{Interstellar messages}}
Category:Search for extraterrestrial intelligence
Category:Interstellar messages