Cosmic Call was the name of two sets of interstellar radio messages that were sent from RT-70 in

Yevpatoria Yevpatoria (; ; ; ) is a city in western Crimea, north of Kalamita Bay. Yevpatoria serves as the administrative center of Yevpatoria Municipality, one of the districts (''raions'') into which Crimea is divided. It had a population of His ...

Ukraine Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...

in 1999 (Cosmic Call 1) and 2003 (Cosmic Call 2) to various

nearby stars This list covers all known stars, white dwarfs, brown dwarfs, and sub-brown dwarfs within of the Sun. So far, 131 such objects have been found. Only 22 are bright enough to be visible without a telescope, for which the star's visible light ...

. The messages were designed with noise-resistant format and characters. The project was funded by Team Encounter, a

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

-based startup, which went out of business in 2004. Both transmissions were at ~150 kW, 5.01 GHz ( FSK +/-24 kHz).

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),"Broadcast for Extra-Terrestrial Intelligence from Evpatoria Deep Space Center" Report on Cosmic Call 1999
/ref> 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 th
Dutil-Dumas Message
created by Canadian scientists Yvan Dutil and Stéphane Dumas, BM is the Braastad Message, AM is the

Arecibo Message The Arecibo message is an interstellar radio message carrying basic information about humanity and Earth that was sent to the globular cluster Messier 13 in 1974. It was meant as a demonstration of human technological achievement, rather than ...

, 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 gave 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:

References

External links

Self-Decoding Messages

* ttp://www.cplire.ru/html/ra&sr/irm/report-1999.html Report on Cosmic Call
Evpatoria 2003 discussion with bitmap and image
{{Interstellar messages Search for extraterrestrial intelligence Interstellar messages Time capsules 1999 in science 2003 in science Technology in society 1999 in Ukraine 2003 in Ukraine

Message structure

Error in Cosmic Call 1

Stars targeted

See also

References

External links