StratoTrack APRS TransmitterReliable Worldwide APRS Tracking at Any Altitude StratoTracks have been used to reliably track weather balloon payloads on all continents except Antarctica. They have even been used to track Northern Lights (aurora borealis) experiments over the Arctic. Key Features: Free Tracking no subscription service required. You can track as many trackers, as long, and as often as you like without having to pay any subscription service fees. You can create a