Stock update:
The Ground Stations and Full Systems are sold out from our store, and no more will be produced.  Check with your preferred dealer for the last remaining inventory.

The Featherweight GPS Tracking system will be replaced by the Featherweight Swift GPS tracking system, which we expect will be available in April 2026.  The Swift will be interoperable with the Featherweight GPS trackers and ground stations and provide additional capability, which will be described in a separate product page.

In the meantime, Featherweight trackers are still available from the store for now, and they can be set to operate as a ground station by selecting "change mode" from the devices page in the Featherweight UI and then power cycling them.  A tracker set to act as a ground station does not have USB serial capability.


The most capable rocketry tracker you can buy for flights up to 262,000 feet.

The Featherweight GPS Tracker is rocketry's longest-range tracking system, and works with iPhone and Android.  Lots of advanced features are available!

Made in the U.S.A.  Updated price includes $6 per tracker in additional cost due to tariffs on internationally-sourced components.

Featherweight GPS Tracker (upd)

$171.00 - $574.00
Available Now!
Picture
Tracker and tracker with ground station enclosure

Hardware Features

Longest Radio Range 

  • Yes, it really can communicate to space (though GPS data available to 262,467 feet).
  • No directional antenna needed.
  • Efficient link with only 100 mW output power
  • Robust margin for rocket body attenuation etc.
  • No cell service required at the range.  Just download the app over WiFi at home and you're good to go.

Advanced GPS (u‑blox M10)

  • Simultaneous reception of GPS, GLONASS, Galileo, and BeiDou constellations means more satellites for your tracker to choose from, giving you great reception wherever the antenna is pointed.
  • 10 GPS solutions per second
  • Vertical and horizontal velocity
  • Reports positions up to 80 km (262,467) altitude and up to 500 meters/second (Mach 1.45)

Small Size and new Longer Battery Life

  • 1.67" x 0.8" board size, not including antenna
  • Tracker can run 16 hours on a small, 400 mAhr single LiPo cell.
  • ​Ground station enclosure can stay up all weekend

Featherweight UI App Tracking Features (iOS and Android compatible)

New tracking display puts all the flight data at your fingertips:

New map view lets you plan the best route for your recovery:

Spoken Telemetry

  • You phone tells you the flight information so you can keep your eyes on the sky
  • Select your preferred voice and speaking speed

Data Logging

  • Records GPS 3D velocity, location and signal strength at 10 samples per second for detailed post-flight analysis
  • Approved for use in Tripoli altitude record attempts
  • Google Earth .kml file is automatically generated

Multi-Stage Flights

  • Monitor two or more stages with one phone app and one ground station.
  • Easily switch channels to monitor each stage.

Over-the-Horizon Relay

  • Any Featherweight tracker with a line of sight will relay the location of a "lost "rocket
  • Other ground stations at the launch will relay your rocket's landed location back to you automatically (in work)

Public Telemetry (in work)

  • Follow along with your friends' flight data with the press of a button
  • LCO can monitor flight progress real-time

Downloading the app:

  • Get the latest released version by searching on "Featherweight UI" in the Apple App store for iOS, or Google Play for Android phones

Accessories and options

Tracker Battery + Adapter

$14.00 - $20.00
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915 MHz Replacement Antenna

$10.00
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Dual Battery Charger

$24.00
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A 3D-printed tracker installation capsule is available from Inverted Pursuits.  This capsule protects the tracker and battery, and clamps it onto a variety of sizes of shock cord so you can install it next to your parachute with no av-bay required.  
Now available with a soldered wire whip antenna as an option when the antenna needs to stick through a bulkhead.  The radio performance of this option is equivalent to the standard stub antenna

Resources

gps_tracker_manual_2025feb20b.pdf​Download the User's Manual,
​updated Feb 20, 2025
​​
​

gs_data_cmds_2020nov15.xlsx
File Size: 123 kb
File Type: xlsx
Download File

Tracker step file

Download a zip file of all Featherweight step files here.

38mm Nosecone 3D Model
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