Featherweight GPS Tracker

Stock update:
The Ground Stations and Full Systems are now back in stock.

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, and more are on the way!

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!

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.

Available at Inverted PUrsuit

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.