The ANELLO Photonics GNSS INS is designed to deliver precise navigation in challenging urban environments, making it the perfect solution to test on San Francisco’s Market Street—a dense, high-traffic corridor notorious for GNSS signal interference and multipath errors.
This 3.5-mile-long stretch is lined with skyscrapers that block satellite signals, making accurate positioning a significant challenge for autonomous vehicles. In a recent case study, ANELLO’s GNSS INS was put to the test, comparing its performance against a well-established Inertial Navigation System (INS) competitor in real-world driving conditions.
Why Market Street is a Challenge for GNSS Navigation
Urban environments like Market Street present severe GNSS navigation issues due to signal reflections off tall buildings and limited sky visibility. These conditions create multipath errors, making it difficult for autonomous vehicles and other applications to maintain accurate positioning. To overcome these challenges, navigation systems require robust sensor fusion and high-precision Inertial Measurement Units (IMUs) that can compensate when GNSS signals become unreliable.
ANELLO GNSS INS: An Advanced Navigation Solution
The ANELLO GNSS INS is designed for high-accuracy navigation in complex environments, integrating its proprietary Optical Gyroscope with GNSS data and wheel speed odometry. This enables precise dead reckoning, even in areas with poor satellite coverage. Key features include:
- 100 Hz Reference-Grade Position, Velocity, and Attitude
- <0.5º/Hr Unaided Heading Drift
- 200 Hz IMU Output Data Rate
- Multi-GNSS Compatibility (GPS, GLONASS, Galileo, BeiDou, QZSS)
- Reliable in Severe Multipath and GNSS-Denied Environments
With applications in autonomous vehicles, robotics, trucking, construction, and defense, the ANELLO GNSS INS offers a versatile solution for GPS-challenged environments.
Test Results
To evaluate its performance, ANELLO’s GNSS INS was installed and a comparable high-end competitor’s system onto a test vehicle and conducted multiple drives along Market Street. The focus was on positional accuracy and heading stability in this demanding environment.
The results were impressive:
- ANELLO GNSS INS maintained an accuracy within 1 meter of actual position, even in areas of severe GNSS interference.
- The competing system exhibited positional drift of up to 15.5 meters over a 250-meter test segment.
This 15x improvement in accuracy highlights the superior sensor fusion and optical gyro technology that set the ANELLO GNSS INS apart.
