Where to buy Firmware updater USB WiFi config Log uploader Guides
FLIGHT TELEMETRY FOR EVERYONE

Serious flight data.
Without the serious price.

Altimeters from 1.35 grams, logging at up to 400 Hz. Flight computers logging up to 2KHz. Charts, filters and full flight analysis, uploaded over WiFi before you've picked the rocket up.
FEATURED FLIGHT#3060US APOGEE 135.1 MMAX VEL 56 M/SFULL ANALYSIS →
▲ #3060 US 135M#3059 US 135M#3057 US 246M#3056 US 220M#3041 US 139M#3038 US 76M4 FLIGHTS THIS WEEK · 15 COUNTRIES
01 · THE HARDWARE

Four devices.
One cloud.

Every device uploads to the same place, charts with the same engine, and configures from the same browser. Pick by mission, not by ecosystem.
Jupiter flight computer
FLAGSHIP

Jupiter flight computer

The Jupiter is our flagship flight computer and tracker all in one. It has a cellular modem and 10 years of line rental included. There is also plenty of data to ensure no worries tracking…
£237.60£198.00 ex VATin stock, ships worldwide
Nano V1 altimeter
Nano V1 altimeter
AC-NANOV1
£53.99 £44.99 ex VAT
Mercury V1 altimeter
Mercury V1 altimeter
AC-MERCURYV1
£64.36 £53.63 ex VAT
Mercury Plus altimeter
Mercury Plus altimeter
AC-MERCURYPLUS
£95.44 £79.53 ex VAT
02 · THE CHARTS

See what your rocket actually did.

01
A short flight on a Nano at 400Hz
The Nano altimeter despite being so small is extremly well specified. With 400Hz logging you can see plenty of detail.
02
TrueFuse & TruePath
TrueFuse & TruePath filters repair pressure errors to give you the true rocket flight and velocity.
03
Zoom in
You can keep on zooming in with 400Hz data and see events in detail that lower logging rates miss. Learn more about your flights with ease.
altimetercloud.com/flights/3060
ALT 135.1 MVEL 56 M/SSTABILITYTRUEFUSE ONTRUEPATH 3D →
03 · OPEN PLATFORM

Fly any altimeter. Chart it here.

Upload logs from other manufacturers' altimeters and get the same charts, filters and sharing.
Altus Metrum EasyMega
ALTUS METRUM EASYMEGA
Altus Metrum EasyMini
ALTUS METRUM EASYMINI
Altus Metrum TeleMega
ALTUS METRUM TELEMEGA
Altus Metrum TeleMetrum
ALTUS METRUM TELEMETRUM
Altus Metrum TeleMini
ALTUS METRUM TELEMINI
Eggtimer ION
EGGTIMER ION
Eggtimer Proton
EGGTIMER PROTON
Eggtimer Quantum
EGGTIMER QUANTUM
Eggtimer Quasar
EGGTIMER QUASAR
FlightSketch Comp
FLIGHTSKETCH COMP
FlightSketch Mini
FLIGHTSKETCH MINI
Jolly Logic AltimeterThree
JOLLY LOGIC ALTIMETERTHREE
Missile Works RRC3 Classic
MISSILE WORKS RRC3 CLASSIC
Missile Works RRC3+
MISSILE WORKS RRC3+
PerfectFlite Pnut
PERFECTFLITE PNUT
PerfectFlite StratoLogger (SL100)
PERFECTFLITE STRATOLOGGER (SL100)
PerfectFlite StratoLogger SL100 (spreadsheet export)
PERFECTFLITE STRATOLOGGER SL100 (SPREADSHEET EXPORT)
PerfectFlite StratoLoggerCF
PERFECTFLITE STRATOLOGGERCF
PerfectFlite StratoLoggerCF (spreadsheet export)
PERFECTFLITE STRATOLOGGERCF (SPREADSHEET EXPORT)
Zeta Rocketry Zeta II
ZETA ROCKETRY ZETA II
Altus Metrum EasyMega
ALTUS METRUM EASYMEGA
Altus Metrum EasyMini
ALTUS METRUM EASYMINI
Altus Metrum TeleMega
ALTUS METRUM TELEMEGA
Altus Metrum TeleMetrum
ALTUS METRUM TELEMETRUM
Altus Metrum TeleMini
ALTUS METRUM TELEMINI
Eggtimer ION
EGGTIMER ION
Eggtimer Proton
EGGTIMER PROTON
Eggtimer Quantum
EGGTIMER QUANTUM
Eggtimer Quasar
EGGTIMER QUASAR
FlightSketch Comp
FLIGHTSKETCH COMP
FlightSketch Mini
FLIGHTSKETCH MINI
Jolly Logic AltimeterThree
JOLLY LOGIC ALTIMETERTHREE
Missile Works RRC3 Classic
MISSILE WORKS RRC3 CLASSIC
Missile Works RRC3+
MISSILE WORKS RRC3+
PerfectFlite Pnut
PERFECTFLITE PNUT
PerfectFlite StratoLogger (SL100)
PERFECTFLITE STRATOLOGGER (SL100)
PerfectFlite StratoLogger SL100 (spreadsheet export)
PERFECTFLITE STRATOLOGGER SL100 (SPREADSHEET EXPORT)
PerfectFlite StratoLoggerCF
PERFECTFLITE STRATOLOGGERCF
PerfectFlite StratoLoggerCF (spreadsheet export)
PERFECTFLITE STRATOLOGGERCF (SPREADSHEET EXPORT)
Zeta Rocketry Zeta II
ZETA ROCKETRY ZETA II
04 · BUILT FOR TRUST
SIGNED ON THE DEVICE · VERIFIED ON UPLOAD

Flight logs you can prove.

Every log is signed on the device itself and verified on upload. An edited file fails the check, so a record claim stands on more than a screenshot.
NANO V1 · MERCURY PLUS · JUPITER V1
SHA-256 ✓
SIGNATURE VALID ✓
UNEDITED ✓
REST API · YOUR DATA, ANYWHERE

Your data, your apps.

A REST API for your flights and devices: pull logs, read stats and drive your own dashboards, apps or hardware from the cloud.
GET /api/flights/93482 → 200 OK
{ "apogee": 842.3, "max_vel": 198.4, … }
05 · THE TOOLS

27 Free tools. In the browser.

All tools →
Flight log upload
You can upload your Nano flight logs here using our secure upload tool. Any edited flight logs will be rejected so we only host genuine as flown logs.
Firmware update
Update or restore your firmware on your altimeter using our handy online web tool.
Online USB WiFi configurator
This tool can set your altimeters WiFi settings via a USB cable from your browser with ease.
Online USB Portal
Use our online USB data reader to grab quick flight summaries from devices, or your WiFi passwords if you can't remember it.
Launch Site Survey, Weather & Predicted Landing
Rocket landing prediction and launch site weather: wind shaped by the terrain, the chance of landing on each hazard, and where to stand for radio tracking.
Nano USB Settings
Configure a Rocketry Ltd Nano V1 altimeter over USB straight from the browser. Sample rate, hybrid logging, launch detection, log format and calibration, without editing a text file. Chrome, Edge or Opera on a desktop or laptop, firmware 1.60 or later.
ESP web programmer
Write, edit, compile and upload ESP32 code right here on our website hassle free. It just works!
GNSS seed data
Free AGNSS assisted-orbit files (GPS, Galileo, BeiDou) for fast cold-start fixes. Rebuilt every 20 minutes. Raw, zlib or LZMA, whole or chunked, over http or https.
3D parts tool
A tool to generate some handy 3D parts for model rocketry needs.
Flight log verification
You can check your Nano flight logs here to ensure they are genuine and unchanged from when the Nano wrote the file using the integrated security features.
Altimeter Cloud API
You can use some of the altimeter cloud via API should you need to.
Air hole calculator
Calculate the correct vent hole size for your rocket body tube based on diameter, length, and number of holes.
Descent calculator
Calculate parachute and streamer descent rates, times and velocities for your rocket recovery system.
Recovery Drift Calculator
Estimate how far your rocket will drift during descent based on altitude, descent rate and wind speed.
Body Tube Strength Calculator
Calculate the axial buckling strength of your rocket body tube based on dimensions and material.
Fin Flutter Speed Calculator
Calculate the maximum safe airspeed before destructive fin flutter based on fin geometry, material and flight altitude.
Rail Exit Velocity Calculator
Calculate the speed your rocket leaves the launch rail and whether it will be stable in current wind conditions.
Altitude Predictor
Predict your rocket's apogee altitude based on motor thrust, mass, drag coefficient and atmospheric conditions.
Visibility & Tracking Calculator
Estimate the maximum altitude and distance at which you can visually track your rocket during flight.
Laser Cut Parts Designer
Design bulkheads, centering rings and fins for laser cutting. Export as DXF or SVG with real-world dimensions.
Ejection Charge Calculator
Calculate the amount of FFFFg black powder needed for your rocket's ejection charge based on airframe dimensions and desired pressure.
Line of Sight & Radio Path
Drag two points onto a map and see whether they can see each other over the real ground, with the earth curvature, the blocking ridge marked, Fresnel clearance and the antenna height each end would need.
Tree Canopy Height Map
Browse tree heights and woodland cover worldwide over satellite imagery. Search a place and hover to read the canopy height, how wooded the ground is and the ground height.
Inland Water Map
Browse lakes, ponds, reservoirs and rivers worldwide at 10 m over satellite imagery. Search a place and hover to see whether a spot is water, how much water is nearby and how far the nearest is.
Main Roads Map
Motorways and main roads worldwide at 10 m over satellite imagery, as a landing hazard. Search a place and hover to see whether a spot is on a main road and how far the nearest one is.
Wind Turbine Map
Every wind turbine drawn with its rotor to scale, with its tip height, hub height and rotor diameter, from the national registers and OpenStreetMap.
Power Lines Map
Transmission and distribution lines worldwide at 10 m over satellite imagery, with every pylon and its height. Search a place and hover for the nearest line and pylon.
Flight log upload
You can upload your Nano flight logs here using our secure upload tool. Any edited flight logs will be rejected so we only host genuine as flown logs.
Firmware update
Update or restore your firmware on your altimeter using our handy online web tool.
Online USB WiFi configurator
This tool can set your altimeters WiFi settings via a USB cable from your browser with ease.
Online USB Portal
Use our online USB data reader to grab quick flight summaries from devices, or your WiFi passwords if you can't remember it.
Launch Site Survey, Weather & Predicted Landing
Rocket landing prediction and launch site weather: wind shaped by the terrain, the chance of landing on each hazard, and where to stand for radio tracking.
Nano USB Settings
Configure a Rocketry Ltd Nano V1 altimeter over USB straight from the browser. Sample rate, hybrid logging, launch detection, log format and calibration, without editing a text file. Chrome, Edge or Opera on a desktop or laptop, firmware 1.60 or later.
ESP web programmer
Write, edit, compile and upload ESP32 code right here on our website hassle free. It just works!
GNSS seed data
Free AGNSS assisted-orbit files (GPS, Galileo, BeiDou) for fast cold-start fixes. Rebuilt every 20 minutes. Raw, zlib or LZMA, whole or chunked, over http or https.
3D parts tool
A tool to generate some handy 3D parts for model rocketry needs.
Flight log verification
You can check your Nano flight logs here to ensure they are genuine and unchanged from when the Nano wrote the file using the integrated security features.
Altimeter Cloud API
You can use some of the altimeter cloud via API should you need to.
Air hole calculator
Calculate the correct vent hole size for your rocket body tube based on diameter, length, and number of holes.
Descent calculator
Calculate parachute and streamer descent rates, times and velocities for your rocket recovery system.
Recovery Drift Calculator
Estimate how far your rocket will drift during descent based on altitude, descent rate and wind speed.
Body Tube Strength Calculator
Calculate the axial buckling strength of your rocket body tube based on dimensions and material.
Fin Flutter Speed Calculator
Calculate the maximum safe airspeed before destructive fin flutter based on fin geometry, material and flight altitude.
Rail Exit Velocity Calculator
Calculate the speed your rocket leaves the launch rail and whether it will be stable in current wind conditions.
Altitude Predictor
Predict your rocket's apogee altitude based on motor thrust, mass, drag coefficient and atmospheric conditions.
Visibility & Tracking Calculator
Estimate the maximum altitude and distance at which you can visually track your rocket during flight.
Laser Cut Parts Designer
Design bulkheads, centering rings and fins for laser cutting. Export as DXF or SVG with real-world dimensions.
Ejection Charge Calculator
Calculate the amount of FFFFg black powder needed for your rocket's ejection charge based on airframe dimensions and desired pressure.
Line of Sight & Radio Path
Drag two points onto a map and see whether they can see each other over the real ground, with the earth curvature, the blocking ridge marked, Fresnel clearance and the antenna height each end would need.
Tree Canopy Height Map
Browse tree heights and woodland cover worldwide over satellite imagery. Search a place and hover to read the canopy height, how wooded the ground is and the ground height.
Inland Water Map
Browse lakes, ponds, reservoirs and rivers worldwide at 10 m over satellite imagery. Search a place and hover to see whether a spot is water, how much water is nearby and how far the nearest is.
Main Roads Map
Motorways and main roads worldwide at 10 m over satellite imagery, as a landing hazard. Search a place and hover to see whether a spot is on a main road and how far the nearest one is.
Wind Turbine Map
Every wind turbine drawn with its rotor to scale, with its tip height, hub height and rotor diameter, from the national registers and OpenStreetMap.
Power Lines Map
Transmission and distribution lines worldwide at 10 m over satellite imagery, with every pylon and its height. Search a place and hover for the nearest line and pylon.
06 · NEWS & GUIDES

From the launch log

All posts →
Looking for the manuals? Support & documentation →
07 · RECENT FLIGHTS

Fresh off the pad.

Browse all flights →
08 · INNOVATION

Small boards. Big ideas.

The filters, firmware and form factors that set our altimeters apart.
TRUEFUSE SENSOR FUSION

One clean trace from every sensor.

TrueFuse blends barometric and inertial data in real time, rejecting mach dip, pad wind and pressure spikes for an altitude trace you can trust.
TRUEPATH TRAJECTORY

See the whole flight path, not just the apogee.

TruePath rebuilds the full 3D trajectory from the IMU, so weathercocking, coning and arc-over show up as clearly as the altitude numbers.
1.35 GRAMS

Flight computers that fit where others cannot.

From the 1.35 g Nano V1 upward, every board carries full logging, WiFi upload and signed flight logs without claiming your payload bay.
09 · ACCESSORIES
Bolt-on capability.
Expansion boards, sensors and spares for your altimeters.
All accessories →
Magnetic switch
Magnetic switch
MRS_MAG1
£22.52 £18.77 ex VAT
ROCKETRY LTD · GBALTIMETERS · FLIGHTS · TOOLS · SUPPORT · API600 FLIGHTS AND COUNTING