APM: Challenge - The Drake Sagan CETI Message

jameschoate at austin.rr.com jameschoate at austin.rr.com
Tue Dec 23 18:46:44 PST 2008


In 1974 Frank Drake used Aricebo to transmit the first CETI
signal. It was a binary signal with no compression or other
'management'.

Assume you are an astronomer in M13 who has received
the signal. Now what [1]?

The -demodulated- signal:

0000001010101000000000000101000001010000000100100010001000100101100101010
1010101010100100100000000000000000000000000000000000001100000000000000000
0011010000000000000000000110100000000000000000010101000000000000000000111
1100000000000000000000000000000000110000111000110000110001000000000000011
0010000110100011000110000110101111101111101111101111100000000000000000000
0000001000000000000000001000000000000000000000000000010000000000000000011
1111000000000000011111000000000000000000000001100001100001110001100010000
0001000000000100001101000011000111001101011111011111011111011111000000000
0000000000000000010000001100000000010000000000011000000000000000100000110
0000000001111110000011000000111110000000000110000000000000100000000100000
0001000001000000110000000100000001100001100000010000000000110001000011000
0000000000001100110000000000000110001000011000000000110000110000001000000
0100000010000000010000010000000110000000010001000000001100000000100010000
0000010000000100000100000001000000010000000100000000000011000000000110000
0000110000000001000111010110000000000010000000100000000000000100000111110
0000000000010000101110100101101100000010011100100111111101110000111000001
1011100000000010100000111011001000000101000001111110010000001010000011000
0001000001101100000000000000000000000000000000000111000001000000000000001
1101010001010101010100111000000000101010100000000000000001010000000000000
0111110000000000000000111111111000000000000111000000011100000000011000000
0000011000000011010000000001011000001100110000000110011000010001010000010
1000100001000100100010010001000000001000101000100000000000010000100001000
0000000001000000000100000000000000100101000000000001111001111101001111000

or,

00000010101010000000000
00101000001010000000100
10001000100010010110010
10101010101010100100100
00000000000000000000000
00000000000011000000000
00000000001101000000000
00000000001101000000000
00000000010101000000000
00000000011111000000000
00000000000000000000000
11000011100011000011000
10000000000000110010000
11010001100011000011010
11111011111011111011111
00000000000000000000000
00010000000000000000010
00000000000000000000000
00001000000000000000001
11111000000000000011111
00000000000000000000000
11000011000011100011000
10000000100000000010000
11010000110001110011010
11111011111011111011111
00000000000000000000000
00010000001100000000010
00000000001100000000000
00001000001100000000001
11111000001100000011111
00000000001100000000000
00100000000100000000100
00010000001100000001000
00001100001100000010000
00000011000100001100000
00000000001100110000000
00000011000100001100000
00001100001100000010000
00010000001000000001000
00100000001100000000100
01000000001100000000100
01000000000100000001000
00100000001000000010000
00010000000000001100000
00001100000000110000000
00100011101011000000000
00100000001000000000000
00100000111110000000000
00100001011101001011011
00000010011100100111111
10111000011100000110111
00000000010100000111011
00100000010100000111111
00100000010100000110000
00100000110110000000000
00000000000000000000000
00111000001000000000000
00111010100010101010101
00111000000000101010100
00000000000000101000000
00000000111110000000000
00000011111111100000000
00001110000000111000000
00011000000000001100000
00110100000000010110000
01100110000000110011000
01000101000001010001000
01000100100010010001000
00000100010100010000000
00000100001000010000000
00000100000000010000000
00000001001010000000000
01111001111101001111000


[1] It should be noted that this is a very difficult problem
and even very skilled attempts have failed, so don't
feel bad. For more info, after you try at least once, can
be found at,

http://en.wikipedia.org/wiki/Arecibo_message

--
 -- -- -- --
Venimus, Vidimus, Dolavimus

James Choate
jameschoate at austin.rr.com
james.choate at twcable.com
512-657-1279
www.ssz.com

Adapt, Adopt, Improvise
 -- -- -- --


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