how was the Arecibo message actually "compressed" ?

作者	消息
Dr. C.E.T.I. 发送消息已加入：29 Feb 00 贴子：16019 积分：794,685 近期平均积分：0	消息 588198 - 发表于：17 Jun 2007, 18:05:56 UTC BOINC Wiki . . . Science Status Page . . . ID: 588198 ·

HTH 志愿者测试人员发送消息已加入：8 Jul 00 贴子：690 积分：909,237 近期平均积分：0	消息 588087 - 发表于：17 Jun 2007, 6:21:23 UTC - 回复消息 585463. 最近的修改日期：17 Jun 2007, 6:49:24 UTC I'm responding to my own post, because I think I found it ... this is it, right? 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 Yes, it seems to be right. See this. EDIT: The "parity" is reversed, though. Manned mission to Mars in 2019 Petition <-- Sign this, please. ID: 588087 ·

Jeffrey 发送消息已加入：21 Nov 03 贴子：4793 积分：26,029 近期平均积分：0	消息 586723 - 发表于：14 Jun 2007, 10:45:59 UTC - 回复消息 586176. Ooooo ... ET call me ! They told me they weren't coming back... ;) It may not be 1984 but George Orwell sure did see the future . . . ID: 586723 ·

MeltWreckage 发送消息已加入：16 Mar 07 贴子：293 积分：15,951 近期平均积分：0	消息 586716 - 发表于：14 Jun 2007, 10:40:15 UTC - 回复消息 586141. 最近的修改日期：14 Jun 2007, 10:41:37 UTC Here ya go Melt. In all it's glory! haha! that's great, Pawly! I like it a lot! and thank you, nobody - I like the graphic representation! although complex, it's visually satisfying - I actually collect those kinds of graphics/diagrams... thanks man! that would have worked if you hadn't stopped me ID: 586716 ·

Dr. C.E.T.I. 发送消息已加入：29 Feb 00 贴子：16019 积分：794,685 近期平均积分：0	消息 586261 - 发表于：13 Jun 2007, 14:20:19 UTC . . .here's something that may bE rElEvant Graph showing the normalized signal-to-noise ratio (SNR) for 1 kW beacon signals over a distance of ten light years. It assumes symmetrical telescopes at both ends of the link, and that the transmitter is not resolved from the image of the star. . . . compare this graph to that given in First Contact26 (Chapter 4, Page 151, by Dr. Michael Klein). The first impressions from that graph (Figure 1 of Chapter 4) is again that optical communications are useless. This is far from the truth. Indeed, the graph is very misleading. One might be forgiven for thinking that in this model, the ETIs are using Compact Disc-type laser-diodes and/or hobby model-type telescopes! The assumed optical EIRPs are much too low. Also, the graph is plotted in terms of EIRP, and therefore exaggerates the efficacy of the microwave approach for an electronic receiver (instead of an observer), because it does not show the typical 10 K noise floor of a high-quality microwave receiver, only the radio brightness of a quiet G-type star. The latter is about 54 dB beneath the 10 K systems noise floor, as shown in Figure 2, and could only be detected after considerable signal integration. At 1.5 GHz, it is generally the Cosmic Background, i.e., the 2.73 K aftermath of the theoretical Big Bang, and the electronic noise in the microwave front-end that limits signal detectability, not Planckian radio noise from the star . . . interested? sEE The Search For Extraterrestrial Intelligence (SETI) In The Optical Spectrum: A Review Copyright Ã‚Â© 1990-2006 Stuart A. Kingsley / The Columbus Optical SETI Observatory BOINC Wiki . . . Science Status Page . . . ID: 586261 ·

Graeme Stretton 发送消息已加入：2 Nov 01 贴子：392 积分：349,012 近期平均积分：0	消息 586176 - 发表于：13 Jun 2007, 8:30:09 UTC Ooooo ... ET call me ! Qunpu' lo'taHmo' jIH yItamQo' ID: 586176 ·

Pawly 志愿者测试人员发送消息已加入：13 Jan 07 贴子：2694 积分：1,049,945 近期平均积分：0	消息 586141 - 发表于：13 Jun 2007, 4:42:58 UTC Here ya go Melt. In all it's glory! DONATE TO SETI ID: 586141 ·

MeltWreckage 发送消息已加入：16 Mar 07 贴子：293 积分：15,951 近期平均积分：0	消息 585463 - 发表于：11 Jun 2007, 22:13:12 UTC - 回复消息 585461. 最近的修改日期：11 Jun 2007, 22:16:07 UTC I'm responding to my own post, because I think I found it ... this is it, right? 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 or is it like this: 00000010101010000000000001010000010100000001001000100010001001011001010101010101 01010010010000000000000000000000000000000000000110000000000000000000110100000000 00000000000110100000000000000000010101000000000000000000111110000000000000000000 00000000000001100001110001100001100010000000000000110010000110100011000110000110 10111110111110111110111110000000000000000000000000010000000000000000010000000000 00000000000000000010000000000000000011111100000000000001111100000000000000000000 00011000011000011100011000100000001000000000100001101000011000111001101011111011 11101111101111100000000000000000000000000100000011000000000100000000000110000000 00000000100000110000000000111111000001100000011111000000000011000000000000010000 00001000000001000001000000110000000100000001100001100000010000000000110001000011 00000000000000011001100000000000001100010000110000000001100001100000010000000100 00001000000001000001000000011000000001000100000000110000000010001000000000100000 00100000100000001000000010000000100000000000011000000000110000000011000000000100 01110101100000000000100000001000000000000001000001111100000000000010000101110100 10110110000001001110010011111110111000011100000110111000000000101000001110110010 00000101000001111110010000001010000011000000100000110110000000000000000000000000 00000000001110000010000000000000011101010001010101010100111000000000101010100000 00000000000101000000000000001111100000000000000001111111110000000000001110000000 11100000000011000000000001100000001101000000000101100000110011000000011001100001 00010100000101000100001000100100010010001000000001000101000100000000000010000100 0010000000000001000000000100000000000000100101000000000001111001111101001111000 that would have worked if you hadn't stopped me ID: 585463 ·

MeltWreckage 发送消息已加入：16 Mar 07 贴子：293 积分：15,951 近期平均积分：0	消息 585461 - 发表于：11 Jun 2007, 22:08:52 UTC I fully understand what it represents. I understand the concept of 23 rows and 73 columns creating a visual message - and I understand the meaning/purpose of the message itself. BUT... What was the actual broadcast? Is it audible? How is it represented visually? Is it similar to binary code, featuring a succession of ones and zeros? If so, is the actual "text" available online? I've only found a graphic of the assembled/translated message. I'm a little confused, and would really appreciate a shove in the right direction! Thank you! that would have worked if you hadn't stopped me ID: 585461 ·

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