the "cosmic call" messages consisted of a few digital sections - "rosetta stone", copy of arecibo message, bilingual image glossary, the braastad message, as well as text, audio, video, and other image files submitted for transmission by everyday people around the world. the "rosetta stone" was composed by stephane dumas and yvan dutil and represents a multi-page bitmap that builds a vocabulary of symbols representing numbers and mathematical operations. the message proceeds from basic mathematics to progressively more complex concepts, including physical processes and objects (such as a hydrogen atom). the message is designed with a noise resistant format and characters that make it resistant to alteration by noise. these messages were transmitted in 1999 and 2003 from evpatoria planetary radar under scientific guidance of alexander l. zaitsev. richard braastad coordinated the overall project.