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Netnod Spring Meeting 2016 Space Communications By Jörgen Städje Tech and Nerd Editor The not very big picture TDRS: 500 watts, 300 Mbps in the Ku and Ka bands The bigger picture Gigabits per second The really big picture The even bigger picture The absolutely humongous picture The ridiculously big picture What are we? Nothing, really. Voyager’s final picture of the Solar System laid out on the Milky Way. Can you spot us? The tiny blue dot? What have we heard so far? The SETI@Home project has been going on since 1999 and so far completely without result. Nothing. Zilch. Nada. What have we done wrong? What’s the problem with us Earthlings and our technology? What can Earthlings do? Voyager Jupiter, 1979 800 x 800 pixel Mars Rover panorama, 2006 MER Spirit in April 2006. 10.000 x 2830 pixel Cassini Saturn, 2007 4088 x 2980 pixels, a mosaic of 12 images taken with the 1024 x 1024 pixels Wide Angle Camera New Horizons Pluto, 2015 1024 x 1024 pixel Radio Galaxy - Astrophysical MASER NGC 4258: MASER with the power of a thousand suns, at 1667 MHz Billionz and billionz of stars Space un-communication When the Sun is angry Carrington event, coronal mass ejection, solar storm, call it what you will. It’s 1013 joules and it’s heading our way, hitting us three days later. It doesn’t affect humans. Only machines. We see it as a lovely aurora. Unprotected machines die. We know the dangers on Earth • • • • STOKABs EMI/EMP-safe computer room deep beneath Stockholm The only way to stay safe from EMP is to have your computers inside a Faraday Cage. The Swedish Post and Telecom Authority (PTS) requires that high security installations follow strict guidelines to survive geomagnetic storms. Nothing will happen if you follow the rules and read your textbooks, really. During the first Carrington event, telegraph lines sparked. Today, everything is optical fibres. But space weather is worse ZAP! BLAM! GAAAH!! • Solar flares can kill satellites and spacecraft • The Japanese Nozomi was killed by a solar flare in 2002 on its way to Mars • A human wouldn’t survive a minute in Jupiter’s magnetosphere • We check out the Sun using observatories like SOHO, giving us a few days warning Recommendations • • • • • See the film Contact by Carl Sagan. The radio astronomy bit is almost correct. Almost. Well, not really. They visit a few real radio telescopes and explain some facts, but then it flips out… Also, read my web article about the Arecibo radio telescope: http://www.qedata.se/e_artiklar_b akgrund.htm#Arecibo Troubleshooting Mars Rovers: http://techworld.idg.se/2.2524/1.1 19061/bilar-pa-mars TDRS satellites: http://techworld.idg.se/2.2524/1.5 58338/kommunikationstrolleri-irymden Voyager has seen it all: http://techworld.idg.se/2.2524/1.3 81514/voyager-har-snart-sett-allt
