SBG Ellipse-D

SBG Systems Ellipse-D is a compact dual-antenna GNSS-aided inertial navigation system for aerial, land and marine platforms. It combines a calibrated IMU with a multi-frequency, multi-constellation receiver and sensor-fusion algorithms, producing position, roll, pitch, heading and heave. Dual antennas provide stable heading without relying on magnetic measurements, including when the platform is stationary.

The 65 g unit measures 46 by 45 by 32 mm and supports RTK, raw observations for post-processing, and aiding from odometers, DVLs or external sensors. Published RTK figures include 0.05° roll and pitch, 0.2° heading and centimetre-level position under stated conditions. Real accuracy depends on antenna geometry, corrections, satellite visibility, aiding inputs, calibration, dynamics and installation quality.