SDR-BASED APRS TRACKER SDR-BASED APRS TRACKER INTRODUCTION What - PowerPoint PPT Presentation

EOSS PRESENTATION SDR-BASED APRS TRACKER

SDR-BASED APRS TRACKER INTRODUCTION What • APRS application to aid trackers in payload recovery Primary Features • Software based (no traditional radios) • Simultaneous reception of APRS packets on multiple frequencies • Offline maps • Landing predictions • Receive only, nothing is transmitted over the air or uploaded to the Internet • Light weight user interface leverages a web browser

WHAT’S IN THE KIT • Kansung Computer • i5 Dual Core CPU • 8GB RAM • 500GB Hard Drive (mechanical) • AC-to-DC power supply • NooElec SDR (USB stick) • GPS Puck • 12v Pigtail Barrel Connector • 2 x USB Extension Cables (long and short)

WHAT YOU NEED TO PROVIDE IN THE VEHICLE* • 2m Antenna • Coax • Should terminate with SMA male • 12v Power • Power isolator/conditioner [optional] * Note: Use the AC-to-DC power supply when at home.

THE SCALE PROBLEM 1 2 3 4 5 Frequencies: 144.340MHz 144.905MHz Top Top Top Top Top 145.535MHz 145.645MHz 145.710MHz 145.765MHz Bottom Bottom Bottom Bottom Bottom

SDR-BASED APRS TRACKER CORE CONCEPT APRS Packets 144.390MHz 144.340MHz 144.905MHz ... Graphical Interface Database APRS Packets 145.645MHz 145.710MHz 145.535MHz • ... Data Acquisition Data Storage Presentation

SDR-BASED APRS TRACKER APRS-IS BLOCK DIAGRAM Read Only SDR GnuRadio Dire Wolf Aprsc • USB stick • Software TNC • Channelize • 2MHz spectrum 2m Antenna • 1200 baud • LP filter width • AFSK demod • FM demod Clients: • Downsample • TrackPoint • APRSISCE • YAAC • Xastir Database Web Web Server Clients OpenStreetMap database and tile • Apache server • SSL (https) Web browser on device of choice (ex. tablet, laptop, phone)

HOW TO CONNECT THINGS IN THE VEHICLE 12v Power Automotive? DC-DC EOSS-xx 1 SDR ON USB Stick 2 Join Wifi Network 2m Rx SMA Antenna Female GPS Puck 3 https://eosstracker.local/

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HOW TO CONNECT THINGS AT HOME - GETTING PREDICT FILES Power Brick AC-DC EOSS-xx 1 SDR ON USB Stick 2 Join Wifi Network 2m Rx SMA Antenna Female 3 GPS Puck https://eosstracker.local/ Home Network https://www.eoss.org/predict