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50 Where are we listening? Could we detect Earth? Is there a Solution?

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Presentation on theme: "50 Where are we listening? Could we detect Earth? Is there a Solution?"— Presentation transcript:

1 50 Where are we listening? Could we detect Earth? Is there a Solution?

2 1960 – Green Bank, WV

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5 The FCC Frequency List!!!! AM Broadcast Standard North America AM Fixed Service Land/Mobile/Marine Amateur 160 Meters Maritime Mobile Fixed Service Land/Mobile/Marine Land Mobile Service Fixed Service Shortwave Broadcast 120 Meters Time Standard Fixed Service Land/Mobile/Marine Aeronautical Mobile Transoceanic Flights Fixed Service Shortwave Broadcast 90 Meters Aeronautical Mobile Transoceanic Flights Amateur 80/75 Meters Shortwave Broadcast 75 Meters, Not in Region Time Standard New WARC Allocation Region Fixed Service Maritime Mobile Ship / Shore Fixed Service Aeronautical Mobile Transoceanic Flights Shortwave Broadcast 60 Meters Time Standard WWV Fixed Service Aeronautical Mobile Transoceanic Flights Fixed Service Shortwave Broadcast 49 Meters Maritime Mobile Ship / Shore Aeronautical Mobile Transoceanic Flights Fixed Service Amateur 40 Meters Shortwave Broadcast 41 Meters, Not in Region Fixed Service Time Standard CHU Canada Time Standard New WARC Allocation Region Maritime Mobile Ship / Shore Aeronautical Mobile Transoceanic Flights Fixed Service Shortwave Broadcast 31 Meters Fixed Service Time Standard WWV Aeronautical Mobile Transoceanic Flights Amateur 30 Meters CW Only Fixed Service Aeronautical Mobile Transoceanic Flights Fixed Service Shortwave Broadcast 25 Meters Fixed Service Maritime Mobile Ship / Shore Aeronautical Mobile Transoceanic Flights Fixed Service Shortwave Broadcast New WARC Allocation Fixed Service Amateur 20 Meters Fixed Service Time Standard WWV Aeronautical Mobile Transoceanic Flights Shortwave Broadcast 19 Meters Fixed Service Maritime Mobile Ship / Shore Fixed Service Shortwave Broadcast 16 Meters Aeronautical Mobile Transoceanic Flights Fixed Service Amateur 17 Meters Maritime Mobile Ship / Shore Fixed Service Maritime Mobile Ship / Shore Fixed Service Amateur 15 Meters Shortwave Broadcast 13 Meters Aeronautical Mobile Maritime Mobile Ship / Shore Fixed Service Aeronautical Mobile Fixed Service Amateur 12 Meters Time Standard Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products

6 Amateur 20 Meters Fixed Service Time Standard WWV Aeronautical Mobile Transoceanic Flights Shortwave Broadcast 19 Meters Fixed Service Maritime Mobile Ship / Shore Fixed Service Shortwave Broadcast 16 Meters Aeronautical Mobile Transoceanic Flights Fixed Service Amateur 17 Meters Maritime Mobile Ship / Shore Fixed Service Maritime Mobile Ship / Shore Fixed Service Amateur 15 Meters Shortwave Broadcast 13 Meters Aeronautical Mobile Maritime Mobile Ship / Shore Fixed Service Aeronautical Mobile Fixed Service Amateur 12 Meters Time Standard Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products Petroleum Products

7 OK, You are beginning to get the idea and we havent even gotten to TV and FM radio! One problem with the previous list… Those signals dont leave earth particularly well. They are refracted around the planet and pretty much stay local. So, lets start looking at the more relevant list.

8 FCC 2003 list

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13 info looks at 2.5 MHz of data, centered at 1420 MHz This is still too broad a spectrum to send for analysis, so it is broken up into 256 pieces, each 9766 Hz This yields 107 seconds of 10 kHz (20kbps) data. 100 seconds times 20,000 bits equals 2,000,000 bits, or about 0.25 megabytes = a "work-unit.".

14 If WE are transmitting all over How come we are Only listening here

15 OK – the first Easy reason…

16 Any Ideas on what to do? How can we hear them, if they are as noisy as us???

17 A possible Solution

18 If you can see this, you can hear all the radio signals too – Youve got to go to the FarSide

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21 Thank you, Grote Reber W9GFZ

22 Sounds of Pulsars – Rapidly Spinning Neutron Stars Crab – Supernova in 1054 AD - ~ 30 rotations/sec PSR J an old pulsar ~ 174 rotations/sec PSR B period= sec rotations/sec PSR B Fastest Known – Period= sec ~642 rotations/sec the surface of the star is going about 1/7 the speed of light Vela – 10,000 years old – 89 millisecond – 11 rotations/sec

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