SCCARC Talk on ADS-B and AIS by Jeff Liebermann 10/15/2021
http://www.learnbydestroying.com/jeffl/ADSB%20Talk%202021-10-15/
http://www.learnbydestroying.com/jeffl/ADSB%20Talk%202021-10-15/ADSB%20Talk%202021-10-15.html
What is ADS-B?
Automatic Dependent Surveillance-Broadcast
(ADS-B)
https://en.wikipedia.org/wiki/Automatic_Dependent_Surveillance%E2%80%93Broadcast
Virtual radar for tracking airplanes. First use to
replace expensive ground based radar in Alaska as an SSR (Secondary
Surveillance Radar).
https://en.wikipedia.org/wiki/Secondary_surveillance_radar
Tech
1090 MHz ES (Extended Squitter ) Traffic only.
978 MHz UAT (Universal Access Transceiver) Traffic and Weather.
Protocols and technology:
https://www.faa.gov/nextgen/programs/adsb/
Dump1090 Mode S decoder:
https://github.com/antirez/dump1090
Virtual Radar Server
https://www.virtualradarserver.co.uk
Use with FlightRadar24 firmware in Raspberry Pi and web browser to decode ADS/B packets.
What I hear with my FlightRadar24 receiver via VRS:
http://127.0.0.1/VirtualRadar/desktop.html
FlightRadar24
https://www.flightradar24.com/37.17,-122/11
Web site to track airplanes.
My FlightRadar24 feeder status:
You need to register with FlightRadar24 to get an ID, login, password, etc.
If you continuously feed data to FlightRadar24, the business class web site service is free.
FlightAware
Web site to track airplanes. Purchased by Collins Aerospace div of Raytheon Tech.
https://flightaware.com/adsb/stats/user/JeffLiebermann
You need to register with FlightAware to get an ID, login, password, etc.
If you continuously feed data to FlightAware, the Enterprise class service is free.
What I hear with my FlightAware receiver:
http://192.168.11.77/skyaware/
Satellites, servers, repeaters, etc
GOMX-4 Cubesat. ADS-B repeater
https://directory.eoportal.org/web/eoportal/satellite-missions/g/gomx-4
ADSBexchange (Unfiltered ADS-B data)
ADS-B receiver and decoder for Android smartphone
https://hiz.ch/index.php/home/adsb-receiver
https://play.google.com/store/apps/details?id=bs.Avare.ADSB
https://play.google.com/store/apps/details?id=bs.Avare.ADSB.Pro $3.00
ADS-B Examples
Eclipse, Fire helicopters, Kabul evacuation, Project Loon
AIS – Automatic Identification System
https://en.wikipedia.org/wiki/Automatic_identification_system
Marine channels 87B (161.975 MHz) and 88B (162.025 MHz).
Uses 9600 bits/sec Gaussian minimum shift keying (GMSK) modulation in a 25 kHz channel using the high-level data link control (HDLC) packet protocol. Sound familiar?
Tech
AIS receivers
https://www.google.com/search?q=AIS+receiver&tbm=isch
AIS vessel tracking web sites
https://www.myshiptracking.com
Local stations
Santa Cruz (at UCSC)
https://www.marinetraffic.com/en/ais/details/stations/3455
Mt Umunhum (Actually Bonny Doon. Burned in CZU fire 08/20/2020)
https://www.marinetraffic.com/en/ais/details/stations/112
NPS (Naval Postgraduate School)
https://www.marinetraffic.com/en/ais/details/stations/230
MBARI (Mt Toro)
https://www.marinetraffic.com/en/ais/details/stations/786
Monterey Harbor (limited coverage)
https://www.marinetraffic.com/en/ais/details/stations/5506