A248747 The Arecibo message written as binary string: a "0" is represented by an "off" radio pulse, while a "1" is represented by an "on" radio pulse.

0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1

Offset

1

Comments

The message sent on 16 November 1974 from the Arecibo radio telescope toward the stars of M13 consisted of 1679 pulses of binary code. The signal was transmitted at a frequency of 2380 MHz and modulated by shifting the frequency by 10 Hz. The Arecibo message can be represented as a graphic array of 73 rows of 23 columns each (see Example section). It contains the numbers one to ten in binary, some of the biochemicals of earthly life, the formulas for the nucleotides in DNA, the DNA double helix, a graphic figure of a human, our solar system, and the Arecibo radio telescope.

Since our number system is based on 10, the binary equivalent of the numbers from a section of the Arecibo message shows a "base of 10".

References

Paolo Saraceno, Beyond the Stars: Our Origins and the Search for Life in the Universe, World Scientific, 2012, p. 316.

H. Paul Shuch (Editor), Searching for Extraterrestrial Intelligence: SETI Past, Present, and Future, Springer-Verlag, 2011, p. 402.

Links

Arkadiusz Wesolowski, Table of n, a(n) for n = 1..1679

Wikipedia, Arecibo message

Example

The Arecibo message as decoded into 73 rows and 23 columns.
A blank space " " is represented by an "off" radio pulse, while an "X" is represented by an "on" radio pulse.
01       X X X X
02   X X     X X       X
03 X   X   X   X  X XX  X
04 X X X X X X X X  X  X
05
06             XX
07           XX X
08           XX X
09          X X X
10          XXXXX
11
12 XX    XXX   XX    XX
13 X             XX  X
14 XX X   XX   XX    XX X
15 XXXXX XXXXX XXXXX XXXXX
16
17    X                 X
18
19     X                 X
20 XXXXX             XXXXX
21
22 XX    XX    XXX   XX
23 X       X         X
24 XX X    XX   XXX  XX X
25 XXXXX XXXXX XXXXX XXXXX
26
27    X      XX         X
28           XX
29     X     XX          X
30 XXXXX     XX      XXXXX
31           XX
32   X        X        X
33    X      XX       X
34     XX    XX      X
35       XX   X    XX
36           XX  XX
37       XX   X    XX
38     XX    XX      X
39    X      X        X
40   X       XX        X
41  X        XX        X
42  X         X       X
43   X       X       X
44    X            XX
45     XX        XX
46   X   XXX X XX
47   X       X
48   X     XXXXX
49   X    X XXX X  X XX XX
50       X  XXX  X  XXXXXX
51 X XXX    XXX     XX XXX
52          X X     XXX XX
53   X      X X     XXXXXX
54   X      X X     XX
55   X     XX XX
56
57   XXX     X
58   XXX X X   X X X X X X
59   XXX         X X X X
60               X X
61         XXXXX
62       XXXXXXXXX
63     XXX       XXX
64    XX           XX
65   XX X         X XX
66  XX  XX       XX  XX
67  X   X X     X X   X
68  X   X  X   X  X   X
69      X   X X   X
70      X    X    X
71      X         X
72        X  X X
73  XXXX  XXXXX X  XXXX

Crossrefs

Sequence in context: A295875 A011676 A277147 * A369665 A295297 A011691

Adjacent sequences: A248744 A248745 A248746 * A248748 A248749 A248750

Keyword

nonn,dumb,fini,full

Author

Arkadiusz Wesolowski, Nov 13 2014

Status

approved