Iridium Satellite Constellation

“Fortunately, the complexity of the Iridium air interface should make the challenge of developing an Iridium L-Band monitoring system very difficult and probably beyond the reach of all but the most determined adversaries” - Iridium LLC

......Q*..rFAB:M3Iv7
323 23.520N 3427.619
E TVG:878 693 585 50
9 449 401 360 324 PG
:...................

Global fish production approaching sustainable limit, UN warnshttps://t.co/uAKQ9EtIaS

— Greenpeace Tuna (@GreenpeaceTuna) July 8, 2016

My first Iridium SBD data!
Thanks to the work of @42Sec & Schneider #hackrf @rad1obadgehttps://t.co/lUDQnAOMpk pic.twitter.com/e08fNcmM7n

— ☞ Gareth (@gareth__) November 28, 2015

Current interests:

• Iridium
  • gr-iridium Github repository
  • iridium-toolkit Github repository
  • Inspectrum Github repository
  • Dan Veeneman - Iridium technical details
  • Iridium Short Burst Data Service Developers Guide (PDF)
  • Time-division multiplexing
  • Frequency-division multiplexing
  • BCH code
  • Phase-shift keying#Differential encoding
  • Baseband#Equivalent baseband signal
  • High-Level Data Link Control#Asynchronous framing
  • “My Kingdom for a Toolsmith! The IRIDIUM system specification through the lens of Actor-Network Theory”(PDF)
  • Radio propagation
  • Maxtenna Right Hand Circular Polarized Antenna M1621HCT-P-SMA (PDF)
  • Adam’s LNA4ALL
  • Adam’s multiple LNA4ALL video
  • Odroid XU4
  • GNURadio