===== Components =====
  * [[http://www.silabs.com/support%20documents/technicaldocs/si570.pdf|Si570 VCXO]] (pdf) ([[http://www.sdr-kits.net/Webshop/products.php?54&cPath=7|Online Shop]]

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

===== Measurement =====
==== SDR ====
  * [[http://www.sdr-kits.net/Webshop/index.php?cPath=5|Spectrum Analyzer 1.4GHz]]

==== Time ====
  * David W. Allan, Neil Ashby, Clifford C. Hodge, [[http://www.allanstime.com/Publications/DWA/Science_Timekeeping/|The Science of Timekeeping]], Hewlett Packard Application Note 1289, 1997
  * Ulrich Bangert, DF6JB, [[http://ulrich-bangert.de/AMSAT-Journal.pdf|Über die Stabilität von Oszillatoren und Frequenznormalen]] (pdf), AMSAT Journal
  * [[http://www.cnssys.com/cnsclock/CNSClockII.php|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)
  * [[http://www.egr.gvsu.edu/~borne/wordpress/|Chrono-tomic Arduino Shield]]
  * http://www.synclab.org/radclock/
  * http://www.setileague.org/hardware/clock.htm



==== ADS-B ====
  * 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/

===== Existing Systems =====

==== Amateur Radio ====
  * 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!)


===== Events =====
  * http://ghz-tagung.de/

===== Unsortierter Haufen Zeugs =====
  * 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
    * [[http://www3.sympatico.ca/colin.kydd.campbell/|Understanding SAW filters]]
    * Protocol design flaws
      * [[http://www.youtube.com/watch?v=AqZNebWoqnc|Towards a formal theory of computer insecurity: a language-theoretic approach]]
      * [[http://media.ccc.de/browse/congress/2011/28c3-4766-en-802_11_packets_in_packets.html|802.11 Packets in Packets - A Standard-Compliant Exploit of Layer 1]]
      * [[http://media.ccc.de/browse/congress/2011/28c3-4763-en-the_science_of_insecurity.html|The Science of Insecurity]]