TelemetryPro® Tracking System
  • Designed and optimized for tracking high power rockets.
  • Reliable, full featured, easy to use, high-end system.
  • Ready to fly.  No assembly or wiring required. 
  • License free.  No Ham license required.
  • Downlink radio range: 550,000 feet   (100 miles)
This system features a synthesized voice named Kate that reports the rocket trajectory in real time during the flight based on GPS and accelerometer telemetry data.  A GPS locator is also built into the receiver and will guide the user directly to the landing site.  An easy to use software program automatically generates a flight summary report, data plots, Excel file and Google Earth trajectory for the flight.
Lead Time:  As of June 8, 2025 the lead time on orders is running about 1-3 weeks depending on incoming order rates and volumes. 
​Availability:  The radio frequencies transmitted by this system are only legal for use in North America and Australia.  This system is only sold there.
Kate-3 Launched Into Space!
Evolution Space launched a rocket using the Kate-3 tracking system to an altitude of 408,456 feet on April 22, 2023.  This is 15 miles above the Karman line, which is the internationally recognized boundary of space. The Kate-3 system performed flawlessly!  Videos, photos and more information about the flight are available at this link.
TelemetryPro® Kate-3 Transmitter
  • Unlimited altitude GPS with five updates per second.
  • License free 900 MHz one watt transmitter with smart power management.
  • ​Downlink radio range: 550,000 feet.  (100 miles)
  • Li-ion battery with onboard charger.
  • Mounts in a standard 54mm coupler tube.
  • Ready to fly. No sled to build, no wiring required.  This is not a "bare board" product.
  • Completely self-contained. Easy to move from one rocket to another.
  • Onboard 50G accelerometer is recorded at 100 readings/sec.
  • Onboard 3-axis gyroscope recorded at 100 readings/sec and is good up to 2000 degrees/sec.
  • Onboard barometric pressure sensor is accurate up to 100,000 feet.
  • All flight data is saved in onboard flash memory for post flight analysis.
  • Built-in USB interface for off-loading flight data and recharging the battery.
  • Six status indicators: Flight Mode, Config Mode, USB Activity, Charging, Charge Done, Charge Failed.
  • Set any Kate-3 receiver to the transmitter ID code to establish a connection.
  • Each transmitter has a unique ID code.  No need to coordinate frequency use at a large launch event.
  • Kate-3 can be used for setting official altitude records maintained by the Tripoli Rocketry Association.
  • The radio frequencies transmitted by this system are only legal for use in North America and Australia.  This system is only sold there.
The Kate-3 transmitter features a GPS with unlimited altitude capability.  It can be used to track extremely high altitude flights and capture the maximum altitude with GPS precision.  Every other GPS tracker being sold for use in hobby/amateur rockets is limited to a maximum operational altitude of 50km (164K feet).  
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Pyro Board adds Deployment and Staging Capability
Another significant feature of the Kate-3 transmitter is an optional add-on pyro board that adds deployment and staging capability.  This means an apogee event can be fired with GPS precision even at altitudes that reach into space.  The pyro board has seven firing channels plus one solid state relay output.   GPS and gyro tilt lockout are included for safe staging.  Power-on and arming of the pyro system can be done remotely for added safety.  There is also a built-in safety shunt for the sustainer motor igniter connection. Deployments and staging events can be configured using the Mx220 Receiver.  No computer needed.  Deployment and staging events can be triggered based on a flexible combination of GPS, accelerometer, gyro, barometric pressure, timer, or manual command. There are also two general purpose inputs for monitoring external events.  Multiple mounting configurations are supported for the pyro board.
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TelemetryPro® Kate-3 Receiver
  • Fully integrated handheld receiver with antenna, display, buttons, and internal GPS.  
  • LCD display is fully readable in direct sunlight.
  • Easy to use and very intuitive.  Simple menu driven user interface with on-screen cursor.
  • Interactive pre-launch go/no-go status display guides user with setup when getting ready to launch.
  • All of the live telemetry data is displayed on screen in real time during the flight.
  • A synthesized voice (Kate) reports rocket trajectory in real time during the flight. Speaker is built-in. An audio output jack is also available for connecting Kate into the launch PA system. It is fun to listen to Kate while watching the flight. This also enhances safety by letting everyone know exactly what is happening in real time. Especially if the rocket has gone out of sight.
  • Flight data and Kate audio commentary from four flights can be saved to internal memory.  The data and audio can also be downloaded over USB for post flight analysis and play back.
  • A locator screen shows distance and direction to the landing site.  Very easy to use for rocket recovery. 
  • A special map mode shows the rocket location in real time on a map displayed on a tablet or laptop.
  • Selectable transmitter ID codes allow any receiver to operate with any transmitter. This allows multiple users to share one receiver. Multiple receivers can also be used for redundancy to simultaneously track one rocket.
  • High performance circularly polarized antenna eliminates signal loss due to transmitter orientation during the flight.  There is a five segment signal strength indicator displayed on screen at all times.
  • Flight simulation mode for initial familiarization and practice before an actual flight. 
  • Status displays for both the transmitter and the receiver batteries.
  • Requires four standard AA alkaline batteries.
  • The radio frequencies transmitted by this system are only legal for use in North America and Australia.  This system is only sold there.
Click the play button to hear Kate say hello.
This audio is from a flight that went just over 10,000 feet.  There are extended periods of silence in some places because this is a recording of the real time events as actually called out by Kate during the flight.
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Turn-On Coil
  • Works with Kate-1, Kate-2 and Kate-3 transmitters.
  • The transmitter can be powered-on by activating the turn-on coil around the outside of the nosecone.
  • No access hole to the transmitter power switch is needed.
  • Turn-on coil is optional but very handy!
  • One button operation.
  • Green LED indicator shows battery status and that the unit is operating.
  • Requires one 9V alkaline battery.
  • Coil is 5.78" ID and 6.78" OD.
  • The transmitter can be powered-off by sending a command from the receiver.
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Carrying Case
  • Tough, rugged and lightweight
  • Airtight and watertight
  • Easy opening ​Press & Pull® latches
  • Soft-grip, solid-core carrying handle
  • Precision cut anti-static polyurethane/ester foam
  • Injection molded HPX® high performance resin
  • Dent-resistant and shatter-resistant
  • Silicone o-ring seal
  • Two molded-in hasps for padlocks
  • TelemetryPro System decal in recessed area on lid
  • Permanently attached Vortex® pressure relief value
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Flight Data Analyzer
Flight Data Analyzer is a software program used to download and analyze the flight data recorded by either the transmitter or receiver.  The data is presented in various plots and as a Google Earth trajectory.  An Excel spreadsheet is also created to allow the user to perform any further analysis that might be desired.  This software can also be used to replay the Kate audio commentary from a flight.  It can also update the firmware in the transmitter or the receiver.
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Hall Of Fame Flights
A collection of flights made by TelemetryPro users is presented in our "Hall of Fame".   Photos, videos, flight data and the Kate audio output from the TelemetryPro system are included.   Visit the Hall of Fame page!
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