Where is your drone going? There is little question that the addition of GPS to the modern drone has been of great benefit to navigation and flight, but is it required? When we refer to GPS, we are talking about all of the variants, including GPS, GLONASS and more.
Join us as we discuss some of the pros and cons of a GPS enabled drone, and some of the alternatives if you’d rather fly a little different.
Why trust Drone Rush?
I’ve been a fan of flight since a young age; while I’ve had few opportunities at the helm of manned aircraft, the hours on my fleet of drones continue to grow. I enjoy putting cameras into the sky, silky smooth aerial imagery makes me happy. My goal is to help all pilots enjoy flight legally and safely.
Early drones, and many current toy-class machines, did not come with a GPS module installed. Like most hobby aircraft, you just got a RC controller and receiver to fly your machine. Skill was required to manage flight with these beasts, often more skill than the average pilot cared to develop.
Dropping a GPS module into a drone made for an easy method to assist pilots with steady flight. Accurate global positioning wasn’t just reported back to the remote, it helped navigate the drone. This is how most current drones hold a solid hover, they lock onto a fairly precise GPS position and fly themselves back to that spot if they drift out of place.
Sticking to a designated height or ensuring you don’t accidentally fly above the 400 foot mark are also functions of GPS. Altitude hold is an important function, I dare say that holding a steady height is the hardest thing to do when you fly manually.
Aside from all that, GPS can be used just for reporting, if that’s what you want. Your DJI drone, for example, creates a flight log for you and you can use GPS to help find a crashed drone.
GPS goes both ways. Your remote control may also have GPS, if not, it may pull GPS coordinates from your attached mobile device. This way your drone knows where you are, great for an accurate RTH.
Do you know your drone laws? Everything you need to know before you fly!
Important update: Drone Remote ID
On April 21, 2021, the FAA in the United States officially rolled out a new drone Remote ID requirement. Part of compliance with the new law requires that all drones broadcast their GPS coordinates, thus, all of your drones will need GPS by October 2023! If your drone is not equipped with GPS, and you cannot upgrade it, there will be external modules that you can attach to the drone. Bottom line, the answer to today’s question is pretty simple, yes, your drone needs GPS.
GPS makes everything better?
GPS sounds like a wonder drug for all things that ail drone flight. It’s hard to dispute that GPS makes most advanced flight-features possible for a drone, but there are some drawbacks.
The first point of contention with GPS in a drone is battery consumption. This is a weak argument against it, but is still accurate. Even if the battery consumption sounds negligible, it is still extra drain on your small batteries.
Next, cost. No way around it, a drone with GPS not only has more parts, the software to control it is more complicated as well. It upsets us to see a huge price bump when a manufacturer takes an existing drone and adds GPS, but it is worth a little more at least.
Complications. I’ve seen issues in several ways with GPS in drones, not the least of which is a simple delay. As most of you know, a GPS enabled device benefits most when it has connection to at least three satellites simultaneously. If I’m not mistaken, DJI drones look for a minimum of seven or eight before the drone reports as ready to fly.
No satellite connection? Fly unassisted or you don't fly at all. Not the best options.
A delay in gathering those GPS connections can be annoying, but what happens when there are not that many satellites to be found? Simple enough, you either fly unassisted or you don’t fly at all, depending on the software limitations.
Related reading: DJI GO 4 app alternatives
I may have used the wrong words there, it’s unlikely the satellites are not around, but interference is certainly a reality. I have an area near my old house that is a rock bed with lots of metals, the magnetic interference is beyond what a drone can manage.
The same is true if you’ve ever tried to launch from the roof of your car. It can be done, but my Mavic Pro reports too much interference to takeoff.
Flying indoors or under a metal roof/bridge can cause a disconnect from the satellites. Not good. Combine bridges with rocks that are rich in metals… be careful.
The last time I flew in a magnetic rich environment, the drone crashed. Reviewing the flight logs, I found that the drone behaved properly, what happened is it thought is was at a specific GPS point, but then as I flew a little higher, it connected to another satellite. The system said “I need to be at Point A,” which it thought it was. Then, a split second later it updated and realized that it was not at that GPS point. Instead of saying “OK, I guess I’m at this new point, I’ll stay here,” it took off like a rocket to get to Point A.
In this situation, the drone was unresponsive to the emergency stop button and my control. Or was it?!? See, emergency stop told the drone to stay where it is. It didn’t know where it was, it was supposed to be at Point A, so it accepted the Halt command as Point A – which means it still had to fly to get there.
As for controlling it, the drone was still confused about where it needed to be, maneuvering the controls to the left, while the drone was speeding right, changed where Point A was located, but the drone still had to get over to that point.
From the middle of the field, boom, it took off over fifty feet, out of control, into some bushes. No harm done to the drone, but I have not taken that thing out since. I don’t trust it.
That was a long story, what I hope you got from it is that this particular drone uses GPS as a crutch. It fails to operate without a solid GPS connection and it has no fail safe if the GPS fluctuates. In this case you are at the mercy of a GPS connection and that does not sit right with me.
Best GPS drones
DJI designed the Matrice 200 series to offer a versatile set of inspection capabilities. Choose from various payloads and mounting points to look up, down...
- 38 - MIN
- 6K - 24 FPS
- 50 - MPH
- 5 - MILES
Building off of the Mavic 2 platform, the DJI Mavic 2 Enterprise offers new cameras and new accessories such as lights, speakers and beacons.
- 31 - MIN
- 4K - 30 FPS
- 44 - MPH
- 4.3 - MILES
Yuneec's reliable hexacopter hardened for the commercial market, the Yuneec H520 is ready for your inspection tasks and more.
- 28 - Minutes
- 4K - 30 FPS
- 38 - MPH
- 1 - MILE
Generally recognized as one of the best camera drones on the market, the DJI Inspire 2 offers great cameras, superb flight and robust controls for...
- 27 - Minutes
- 6K - 30 FPS
- 58 - MPH
- 4.3 - MILES
The DJI Phantom 4 RTK adds the best GPS precision to the popular Phantom line of drones. This is a serious tool for drone mapping,...
- 30 - MIN
- 4K - 30 FPS
- 36 - MPH
- 4.3 - MILES
Alternatives to GPS
Before we pretend you can do away with GPS and get the same flight experience, you can’t. Not today at least.
Manufacturers and accessory creators have been toying with additional sensors to enhance the experience. Primarily, you’ll find vision sensors on many drones. Obstacle avoidance prevents damage to your drone, but also gives your machine reference points to maintain a hover.
Your camera can be utilized along with laser and other proximity tools. One of the best examples of this is Intel’s RealSense technology. A short bar of sensors that attaches to your drone to provide collisions avoidance with enough accuracy it can help with navigating around an obstacle, not just halting in spot.
NVIDIA is taking that to the next phase. Utilizing the Jetson supercomputer board, they have been building full autonomous flight into a test drone. Working along a