Meet the Reliable Here 3 GNSS Receiver

The Here 3 GNSS receiver with a built-in u-blox M8P module, the DroneCAN protocol and a completely redesigned housing. The new generation of the Here family increases performance, lowers the price and sets a new benchmark for GNSS solutions for the robotics and aviation industry.

The Here 3 GNSS receiver is the latest GNSS navigation solution in the CubePilot product family. Here 3 replaces the previous Here, Here 2, Here+ and Here+ V2 models and joins the flagship HerePro as the new base GNSS receiver model. It stands out from its predecessors with a completely new design. The new outer housing no longer has the safety switch found in previous models. The redesign improved the receiver's water resistance, so the Here 3 can be used in harsher conditions than before. The new LED design is also visible from the outside – the LEDs are brighter and easier to see than before. The biggest change is inside: the new receiver has the new u-blox M8P chipset, which means it supports RTK surveying mode without any modifications.

Reference corrections

Real-Time Kinematic mode is available as soon as the receiver gets a valid stream of RTCM3 corrections. Reference corrections can be obtained from free and paid correction services, or provided by Mission Planner together with any base station able to generate an RTCM3 correction stream. Positioning accuracy in 3D FIX mode is around 2.5 metres. RTK mode reduces the positioning error to 0.025 metres.

Configuration of the Here 3 GNSS receiver with a base station providing RTCM3 reference corrections.

Receiver features

The Here 3/3+ GPS is a cost-effective GNSS system that supports real-time kinematic (RTK) mode. In ideal conditions it achieves centimetre-level positioning accuracy. The Here 3+ version has improved dust and water resistance. The DroneCAN protocol gives access to features such as high data throughput, updatability and noise immunity. The base version has an STM32F302 processor, while the upgraded version has a dual-core STM32H757 processor clocked at 400 MHz with 2 MB of flash and 1 MB of RAM. The system supports the most popular base station systems. A built-in inertial unit consisting of a compass, gyroscope and accelerometer allows the system to be used in advanced navigation scenarios. It runs on the ChibiOS real-time operating system, and its open-source structure is ideal for developers with specialised requirements for their navigation systems.

You can find more information about integration with a drone in the manual 

Applications of the Here 3 GNSS receiver

The Here 3 GNSS receiver is part of the CubePilot ecosystem, so it can easily be integrated with other components of the ecosystem. It is used in all kinds of unmanned vehicles – from unmanned ground vehicles (UGV) and unmanned surface vessels (USV) to unmanned aircraft. The range of applications is as broad as the range of vehicles using it, from hobby and professional vehicles to solutions developed for scientific research.

Bottom left: a hobby build. Bottom right: a solution by velosUAV. Top: a drone swarm using CubePilot GNSS receivers.