On this page is everything you need to know to conduct an Astropod flight. Don’t just take your Astropod to a launch site and wing it - we recommend you read through each section thoroughly before attempting to launch. If you have any questions that aren’t answered in these pages, contact us and we’ll be happy to explain. First, a brief overview…


Six simple steps

Pick a launch site

Run some flight path predictions

Order your gas

Let us know your launch date

Set up your flight computer

Go and launch your Astropod!


Launch Sites

Launch Site Locations

We have ten dedicated launch sites across the UK. Each of these has been pre-approved by the Civil Aviation Authority (CAA), which means all you need to do is tell us your intended launch site and a contact phone number thee days in advance at

Find your nearest launch site here.

Launching without a valid exemption and an active NOTAM is a criminal offense. An unregulated launch could pose serious risk to persons, property and even national security. If caught, you may be fined up to £10,000 and could face a prison sentence.

If you’d like to launch from another site, you can apply for an exemption directly from the Civil Aviation Authority. Fill in this form and email it to This process takes around 6-8 weeks. Once your exemption has been granted, you will need to ask the CAA to issue a Notice To Airmen (NOTAM) 72 hours before you launch.


Flight Path Predictions


When you launch your Astropod, you will want to know where it's going to land. You want your Astropod to touch down in somewhere accessible, but far enough away from built up areas that there's no risk of someone else picking up your payload. You also want to make sure it's not landing in the sea!

The flight path will vary from day to day, depending on weather conditions on the ground and in the stratosphere all the way up to the edge of space. You can make predictions up to 7 days in advance, but they become more and more reliable the closer you get to launch. On the day, the landing prediction is generally reliable to within 2 miles.

These predictions are normally accurate to within two miles, so you should check a two mile radius around your landing site for any potential hazards.

If the Astropod is landing very close to a built-up area, a large body of water or private land which is likely to be inaccessible, you might want to wait for another day. Roads, rivers and other small features probably won't present an issue.

You should start running predictions daily in the week before your flight window starts. On the day before your planned launch date, run a prediction every few hours.

Small unpredictable variations in stratospheric pressure can mean your speed and final altitude may vary slightly. Check what happens if the ascent or descent rate change by ±1 m/s, and also what happens if the burst altitude changes by ±1000m.



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To launch Astropod, you will need three cylinders of helium gas. This will provide the lift force required to take your Astropod to the edge of space.

In the future, you will be able to buy the gas directly from our website. Right now, however, you can buy them from BOC here - select the cylinder “to fill 50 balloons”.

The Astropod kit has been specially designed to work with the amount of gas in three cylinders. You must use all of the gas for your flight.

If you fail to completely empty each cylinder into the balloon, or if you add more weight to the Astropod, your Astropod is at risk of reaching neutral buoyancy before bursting and floating for thousands of miles.


 Flight Computer


The heart of the Astropod system is the flight computer. A simple smartphone system is used to run two applications, HVR and Google Maps. Both apps are preinstalled.


When you power up the flight computer for the first time, you’ll be asked to set up a new Google account or log in with an existing account. You should create a new account to make tracking your Astropod as simple as possible.


HVR is a video recording app which records directly to the SD card without draining the battery by keeping the screen active. To set the flight computer recording, simply open the app and press the button, then lock the screen to prevent any accidental inputs.

Google Maps

Meanwhile, Google Maps allows you to locate and recover your Astropod when it lands. To use, simply open the app menu and enable location sharing. You may be asked to authorise the app to access location data - this is required and will only be visible to you. Enable location sharing “until I turn this off” and share with a contact. Then, insert the email address of your primary Google account.


If you have any issues with either app, check out the recommended settings or contact us directly for assistance.





The day before you head to your chosen launch site, fully charge your flight computer and confirm the flight path predictions are favourable. Check that the flight computer is still sharing its location with you.

The launch site

On the day, when you arrive at the site, begin by preparing the flight train. Cut your cord into two equal lengths and attach to either end of the parachute.

Now you’re ready to fill up the balloon. Attach the hose on the cylinder and put on the gloves. Remove the balloon from its packaging, unfurl the neck of the balloon and insert the end of the hose up to the top of the neck. Use a cable tie to secure the balloon to the hose, grip it tightly and open the cylinder.

When the first cylinder runs out, pinch the hose at the end to prevent gas escaping and switch the hose to the next cylinder. Repeat with all three cylinders, pinching the hose in between to prevent the gas escaping.

Once all three cylinders are emptied into the balloon, carefully remove the hose from the neck, keeping a firm grip on the balloon at all times. Tighten the cable tie, tape the loose end down and tie the top of the parachute to the neck of the balloon. Keep a tight hold!

Turn on your flight computer, open Google Maps and enable location sharing, then open HVR and set it recording.

Put the flight computer into the Astropod and seal it up with the rubber bands. Tie it to the bottom of the parachute. Run a final prediction (just to make sure).

Now you’re ready to release the Astropod!


Travel to the predicted landing site and start monitoring the position of your Astropod. Because the Astropod’s tracking system relies on connection to the 4G network, it will not update while your Astropod is in flight. This is entirely normal.

Start refreshing the location of your Astropod after it has been in the air for two hours. Don’t refresh the location more than once every five minutes - this may compromise the accuracy of location updates.

Once you get the same location twice, your Astropod has landed. You can use Google Maps to navigate directly to the landing site, or program the coordinates into a satnav or other navigation device.

Travel to the landing site and retrieve your Astropod. All that’s left to do is get home and review your amazing footage from the edge of space!