The board uses an STM32L433 Cortex M4F host programmable via the USB connector using the Arduino IDE and an Arduino core created by Thomas Roell.
The absolute position engine is a UBLOX CAM M8Q concurrent GNSS module connected to the STM32L433 via UART. The CAM M8Q uses a chip antenna so no external wire or patch antenna is required resulting in a very convenient device package. The pcb is an integral part of the CAM M8Q antenna and the pcb has been sized to meet the minimum ground-plane size recommendations (20 mm x 45 mm).
The absolute orientation engine uses the MPU9250 accel/gyro/magnetometer IMU sensor plus the MS5637 barometer as slaves to an EM7180 motion co-processor that sends quaternions and drift-stabilized altitude to the host via I2C.
The EAGLE design files are available on OSH Park shared space.
There is an Arduino library and sketch available on github.