The Professional Imaging Platform
The DATAhawkPPK - An ultra high-accuracy fixed wing drone package for professional surveyors that need maximum geospatial precision for their customers.
"When flown and processed correctly, this system positions every pixel exactly where it belongs on the earth's surface. It is an incredible achievement."
QuestUAV is renowned for quality and reliability. This new product carries our heritage of testing and verification, ensuring that it fits the stringent attributes that professional surveyors and mappers require.
After almost three years of development, the DATAhawkPPK is now in production and ready for delivery.
|UAV Type||Fixed Wing|
|Pre-Flight Setup time||~5 mins|
|Endurance In A Single Flight||Up to 45 minutes|
|Average Cruise Speed (Overidable)||35 Knots|
|Max Speed||54 Knots|
|Take-Off Type||Hand Launch, Air Dock Launch System, Zip Line|
|Landing Type||Auto Landing, Belly Landing, Parachute|
|Landing Space||30 x 15m|
|Material of Construction||EPP (Expanded Polypropylene), Carbon Fibre, Corex, Polypropylene (1.2mm), ABS (1.5mm), Laminate (0.0125mm)|
|Motor Type||Axi 360W Brushless Motor|
|Power Source||2 x 4000mAh LiPo (Total 8000mAh)|
|Communication and Control Range||2.4Ghz 2km|
|Long Range Communication and Control Range||868Mhz 20km|
|Flight Planning and Control Software||Included|
|Image Processing Software||Pix4DMapper Pro, Agisoft Photoscan or ATLAS.|
|Carry Case||1 Hard Case (975x520x380mm)|
|Parachute Recovery System||Yes|
|Radio Tracker||Available as an Optional Extra|
|Radio Tracker Specs||7.9g, 80km Range, 433MHz/GPS Tracker|
|Electronic Speed Controller||40amp With Thermal and Overload|
|Servos||Metal Gear (Digital)|
|Aerial Power||10mW with 2.4gHz / 1-315mW with 868Mhz|
Validated Accuracy Results
The accuracy of the DATAhawk PPK system is validated by comparing the results of repeated aerial surveys with precisely measured verification points (GCPs) - using a total of 30 target points over the 100Ha test site.
This whitepaper contains the results of 37 flights with a verified accuracy as follows:
|Absolute RMSE Accuracies|
PPK Workflow - The Process
The first step involves the geotagging of images with the coordinates (an automated process) and the second requires a transformation from a worldwide coordinate system to the system you use in your country. Both are easy processes and can be included in your training workflow.
Why Choose PPK?
The DATAhawk PPK drone produces repeatable, industry leading results. Unlike our competitors, the Datahawk is equipped with a dual-frequency L1/L2 receiver tracking both GPS and GLONASS
signals. 132 hardware channels allow to simultaneously track all visible GPS/GLONASS satellites. The strength of the Datahawk as a large area survey tool.
This system allows the aircraft to fly much further than with an RTK system: after flight camera positions are corrected by combining GNSS recordings of the aircraft with the corresponding information of the reference base station on the ground.
This allows the UAV to be free of the requirement of a separate, high bandwidth, GPS link to a base station. (For a more detailed explanation, see the "Know How" article below).
Built with long service in mind, our drones use only the highest quality processes, the toughest building materials and are backed by "real-life" support personnel. Precision engineering techniques, rigorous testing and off-the- shelf spares ensure your QuestUAV will be ready to fly, even under the toughest conditions.
Training is a key component of PPK success. Our workflows, training suite and qualified staff are ready to take you through both the Datahawk flying training and the PPK workflows.
Operator Safety, Public Safety, Flight Safety. All drone operations have raised safety standards and QuestUAV is no exception. You can be fully reassured that any QuestUAV comes with a excellent track record for safety, and that training and documentation focus UAV operations on safety in every aspect of flying.
With a ten year history of industry-leading designs, QuestUAV continues to focus on improving redundancy, failsafes and operator awareness. Parachutes, auto landings, virtual fences, passive launch systems are examples of our dedication to better design and training.
The DATAhawkPPK Package
QuestUAV Know How:
GCP vs PPK vs RTK
We often get asked to explain what PPK is in simple words. It is not that easy, but a few pictures make it a lot easier! So here is a short lesson.
1. This image below shows a simple flight with a standard fixed wing UAV that has no PPK or RTK on board and is not using any ground control points for accuracy. All it has to provide accuracy is the normal, low grade GPS constellation, that most devices use for global positioning. The result is a geospatial accuracy of 5 metres to 20 metres. No good for a surveyor!!
2. The image below shows a flight that is backed up with the use of ground control points (GCP's). The GCP's are surveyed to high accuracy and all UAV images that show a GCP are manually adjusted in post processing for best accuracy. The result is high geospatial accuracy (a few cm), but the whole process can take a lot of time, especially in the laying, positioning and lifting of GCP's. The extra time taken can be costly for an operator.
3. The image below shows a flight using RTK (Real Time Kinetics). A high accuracy constellation is used and a positioning signal is beamed to the UAV from the ground. The limitation with RTK comes when this beamed signal is broken through distance or interference. If this happens the whole survey generally needs to be reflown. This method is unsuitable for fixed wing aircraft that, by their very nature, need to fly further from the operator and possibly into BVLOS (Beyond Line of Sight).
4. The image below shows a flight using PPK (Post Processing Kinetics). As with RTK, a high accuracy constellation is used but a positioning signal is NOT needed to be beamed to the UAV. The result is that the UAV can fly as far as needed yet still retain the accuracies provided by the high accuracy GPS/GLONASS constellation. Any inaccuracies are recorded by ground equipment and installed into the post processing workflow. This makes the PPK system the most efficient and reliable method for ultra high accuracy surveying.