RTK Drone Filming: The 3D Dolly in the Sky
Every DOP knows the value of a dolly track. Lay it once, and the camera travels the same path at the same speed on every take. Until recently, that kind of repeatability stopped at ground level. Aerial shots depended on the skill of the pilot, and however good they were, no two passes were ever quite the same.
RTK changes that. At Moonshine Film we now fly repeatable, programmed drone moves that hold their line to within centimetres, take after take. Here's what RTK is, how it works on set, and why it's worth asking for on your next shoot.
What is RTK drone filming?
RTK stands for Real-Time Kinematic. It's a way of correcting GPS positioning so it's far more accurate than standard satellite navigation.
Standard GPS on a drone is good enough to fly safely, but its position can drift by a metre or more. That doesn't matter for a one-off shot. It matters a lot when you need the camera to be in exactly the same place twice.
With RTK, a ground base station sits on a tripod at a fixed, known point. It compares the satellite signals it receives with its own position and sends corrections to the drone in real time. The result is a drone that knows where it is to within centimetres.
That accuracy means a move can be programmed once and flown again identically: same start point, same path, same speed, same framing. Think of it as a dolly track in the sky.
How it works on set
The process is simpler than it sounds.
1. Set the base station
The crew sets up the RTK base station on a tripod at a fixed point near the action. It stays there for the whole sequence, so every flight is measured against the same reference.
2. Design the move
The pilot and the director or DOP agree the shot: where it starts, where it ends, how fast it travels and what the camera does along the way. The move is then flown and recorded as a programmed path.
3. Fly it, then fly it again
On "action", the drone flies the programmed move. When the take is done, the crew resets and the drone returns to the start position. The next take follows the same line. If the director wants another go, it's a reset, not a rebuild.
4. Record at full quality
Because the move is repeatable, the camera team can focus on the image. In our proof-of-concept below, the camera recorded in ProRes RAW with a D-Log profile, giving plenty of room in the grade.
See it in action
The clip at the top of this article shows a single RTK take from three angles at once.
At the top you can see the setup: two operators and the RTK base station on its yellow tripod. In the middle is the clean shot. The drone starts low beside a batter on a cricket pitch, then on "action" flies back and up in one straight diagonal to reveal the whole stadium. At the bottom is the live camera feed, recording ProRes RAW in D-Log.
Listen at the end of the clip and you'll hear the crew say, "We can go again… resetting." That's the whole point. The move is ready to fly again, exactly the same way.
What you can do with repeatable drone moves
A one-off aerial shot is a great establishing image. A repeatable one opens up techniques that used to need motion control rigs on the ground or a lot of luck in the air.
Matching takes
When the camera path is identical every time, you can cut between takes without the background jumping. Performance changes, lighting tweaks and different actions can all be filmed on the same move and edited together cleanly.
VFX plates that line up
Visual effects teams need clean plates that match the hero take. With RTK, the drone can fly the same path with and without actors, vehicles or set pieces, so the plates line up and compositing is far less painful in post.
Day-to-night and timelapse passes
Fly the move at midday, again at golden hour, and again after dark. Because the path is the same, the passes can be blended into a single shot that moves through time. The same approach works for timelapses that need camera movement, flown in stages over hours or days.
Before-and-after comparisons
Construction projects, renovations, events and landscape changes can be shown from exactly the same viewpoint, weeks or months apart. Return to the same base station point, fly the same move, and the comparison speaks for itself.
Why it matters for your production
Moves like this are very hard to repeat by hand. Even the best pilots can't match a complex diagonal reveal to the centimetre twice in a row. RTK takes that variable away, which saves time on set and gives the edit and VFX teams material they can actually use.
It also means fewer compromises. Directors can ask for another take without worrying that it won't cut with the last one, and producers get a more predictable day.
Moonshine is one of the few creative drone teams in London flying this way.
Working with Moonshine's drone team
Our drone crew is based at 95 Horseferry Road, Millbank, London SW1. Our pilots are CAA-licensed and SORA-approved, and work under OSC frameworks. Our fleet includes the DJI Inspire 3, Mavic 4 Pro, FPV drones and the Alta X heavy-lift platform, and we supply full crews as well as kit.
If you're planning a shoot that needs matched aerial takes, VFX plates or time-lapse passes, see our drone pilot hire packages or get in touch with the team to talk through the shot.
RTK drone filming FAQs
What is RTK drone filming?
RTK (Real-Time Kinematic) drone filming uses a ground base station to correct the drone's GPS in real time, holding its position to within centimetres. This lets a programmed aerial move be flown identically again and again.
What is RTK used for in film and TV?
It's used for matching takes, VFX plates that line up with the hero shot, day-to-night and timelapse passes along the same path, and before-and-after comparisons filmed from exactly the same viewpoint.
How accurate is RTK compared with normal drone GPS?
Standard drone GPS can drift by a metre or more. RTK corrections bring that down to within centimetres, which is what makes repeatable moves possible.
Do I need a special crew for RTK drone shots?
You need a team that knows how to set up the base station, programme the move and reset between takes. Moonshine's CAA-licensed, SORA-approved pilots handle all of this as part of the drone crew.
Can you fly RTK drone shots in London?
Yes. Moonshine is based in Millbank, London SW1, and our pilots work under OSC frameworks. Get in touch with the details of your location and we'll advise on what's possible.
