• Si570 VCXO (pdf) (Online Shop

http://rtcmagazine.com/articles/view/102014 clock

• Spectrum Analyzer 1.4GHz

• David W. Allan, Neil Ashby, Clifford C. Hodge, The Science of Timekeeping, Hewlett Packard Application Note 1289, 1997
• Ulrich Bangert, DF6JB, Über die Stabilität von Oszillatoren und Frequenznormalen (pdf), AMSAT Journal
• CNS Clock II
• Trimble Resolution T Timing GPS module 12ns 1pps (ebay)
• Motorola UT Plus Oncore Timing GPS 1PPS (ebay)
• High accuracy 20ns timing glonass/gps receiver| 2X 1PPS (ebay)
• Chrono-tomic Arduino Shield
• http://www.synclab.org/radclock/
• http://www.setileague.org/hardware/clock.htm

• http://www.mydarc.de/dl8wig/adsb.html
• http://www.flightradar24.com/ Homepages with real time display of all planes visible to ADS spotters worldwide
• https://en.wikipedia.org/wiki/Multilateration
• http://www.multilateration.com/

• Satellites
  • http://www.amsat.org http://www.uk.amsat.org/ http://www.amsat-dl.org/ Development and operation of all Amateur Satellites (OSCAR)
  • http://www.dd1us.de/ listen how the signal of <100 satellites sounds / have sounded
  • http://www.dk3wn.info/satellites.shtml listing of all amateur satellites in space + links to detailed info
  • http://oscar.dcarr.org/
  • http://www.ne.jp/asahi/hamradio/je9pel/fastdigi.htm
• HAMNET
  • http://www.do4bz.de/index.php/linkstrecken-google-maps
  • https://maps.google.de/maps/ms?gl=de&ie=UTF8&oe=UTF8&msa=0&msid=102761689187503598021.00047dc415c57e32fcfda
  • http://www.adacom.org/
  • http://www.amateurfunk-wiki.de/index.php/Hauptseite
• Digital wireless
  • http://www.youtube.com/watch?v=jQpBGh9RMEQ
  • http://aintel.bi.ehu.es/psk31.html
  • http://www.digipan.net/ PSK31 slow, low bandwidth communication on shortwave
  • http://physics.princeton.edu/pulsar/K1JT/ http://physics.princeton.edu/pulsar/K1JT/wspr.html slow communication modes working with VERY weak signals (Earth-Moon-Earth)
• Space communication experiments
  • http://en.wikipedia.org/wiki/EME_%28communications%29 www.youtube.com/watch?v=m3XlAgl4FBU EME communication
  • http://www.amsat-dl.org/index.php?option=com_content&task=view&id=166&Itemid=97 Earth-Venus-Earth communication (extreme!)

• http://ghz-tagung.de/

• http://www.satmagazine.com/ Much about all kind of satellites, especially Cubesat nanosatellite development and operation
• http://www.hb9f.ch/bastelecke/pdf/Easysat_HB9WDF_Version_PDF.pdf - (German): Introduction to ham sat users - easy and complete
• http://www.satellitenwelt.de/uhfmilsat.htm
• http://astropeiler.de/, http://cre.fm/cre186
• http://genso.org/
• https://sites.google.com/site/hamsatdroid/
• http://www.uk.amsat.org/2011/11/20/london-hackspace-work-on-hacksat1/
• http://wiki.london.hackspace.org.uk/view/Project:HackSat1
• http://www.tuks.nl/wiki/index.php/Main/TelluricElectricWaves - An alternative to using sattelites may be to use waves trough the interior of the Earth, Tesla style.
• http://en.wikipedia.org/wiki/EME_%28communications%29 - Another alternative is to use a natural sattelite that is already there. Currently, an investigaton is being done to investigate the possibility of using longitudinal dielectric waves instead of the normally used transverse waves: http://www.energeticforum.com/renewable-energy/9727-who-performs-first-longitudinal-moon-bounce-history.html First result is that the prototype antenna that has been made does resonate at a frequency it is not supposed to resonate according to current accepted (transverse EM) wave theory: http://www.energeticforum.com/173559-post104.html
  • http://buythissatellite.org/
• Legal
  • http://www.oosa.unvienna.org/pdf/publications/STSPACE11E.pdf
  • http://www.unoosa.org/oosa/index.html
  • http://www.oosa.unvienna.org/oosa/en/FAQ/splawfaq.html#Q7
  • Understanding SAW filters
  • Protocol design flaws
    • Towards a formal theory of computer insecurity: a language-theoretic approach
    • 802.11 Packets in Packets - A Standard-Compliant Exploit of Layer 1
    • The Science of Insecurity