ANELLO GNSS INS
PERFORMANCE IN A PARKING STRUCTURE

ANELLO GNSS INS PERFORMANCE IN A PARKING STRUCTURE

Parking structures are among the most extreme GPS-denied environments, presenting a formidable challenge for any inertial navigation system. With zero sky visibility, dense concrete barriers, and no access to GPS signals, they expose the true capabilities of a navigation system’s dead reckoning and sensor fusion performance. 
In this real-world test, ANELLO Photonics showcases the power of the ANELLO GNSS INS system, featuring a Silicon Photonic Optical Gyroscope (SiPhOG™), in a fully GPS-denied scenario at Levi’s Stadium in Santa Clara, CA. The ANELLO GNSS INS is benchmarked against a top industry competitor to evaluate accuracy, stability, and robustness in high-interference environments.

BACKGROUND

Levi’s Stadium’s multi-level parking structure offers an ideal testing ground for autonomous vehicle navigation without GPS. With a total drive path of 750 meters inside the structure, this test simulates the type of GPS-denied navigation environment commonly encountered by autonomous vehicles, mobilerobotics, industrial machinery, unmanned ground vehicles (UGVs), automated port equipment, warehouse AMRs, and defense platforms operating in tunnels, urban canyons, dense foliage, or jammed environments. 
The ANELLO GNSS INS integrates our IMU with optical gyroscope and advanced inertial sensor fusion algorithms to ensure uninterrupted positioning and heading data, even in complete GPS outages. This makes it uniquely suited for robotics, unmanned vehicles, surveying, military platforms, and autonomy at scale.
Driven by ANELLO’s optical gyroscope technology, the ANELLO GNSS INS delivers industry-leading performance in GPS-degraded and GPS-denied conditions. The system fuses data from its optical gyroscope, high-precision accelerometers, and optional inputs such as GNSS and wheel odometry to generate robust, high-frequency positioning outputs with exceptional accuracy and stability.

THE ANELLO GNSS INS

Key features that make the ANELLO GNSS INS ideal for a parking structure include:

  • Accurate in severe multipath and GNSS denied 
  • < 0.5º/hr unaided heading drift for reliable orientation 
  • Reference-grade 200 Hz Position, Velocity, and Attitude output 
  • On-Board GNSS/INS Sensor Fusion 
  • Automotive Ethernet, Dual RS-232 Interfaces 
  • GPS, Glonass, Galileo, Beidou (Compass), QZSS 
  • IP68 - Waterproof, Resistant to Dust, Salt Spray and Chemicals
  • Optimized for autonomous navigation, robotic control, precision agriculture, construction, mapping/surveying, and defense missions
ANELLO GNSS INS

Fig. 1: The ANELLO GNSS INS. The ideal companion for navigation and positioning in Parking Structure

TEST DRIVE RESULTS AND BENEFITS IN PARKING STRUCTURE

We put the ANELLO GNSS INS to the test, side by side with a top competitor, by driving 750 meters through a parking structure with zero GPS signal. The results of this real-world test are below and highlight the strength of the ANELLO GNSS INS performance when satellite signals disappear.

  • ANELLO GNSS INS maintained a precise trajectory with only 3.0 meters of cross-track error 
  • Competitor 1 drifted significantly, recording 11.3 meters of cross-track error, which is nearly 4x worse

This test drive highlights ANELLO’s unmatched ability to deliver accurate dead reckoning and maintain rock-solid positioning without relying on external signals. This performance transforms autonomous vehicles (military and industrial), autonomous trucks and logistics platforms, warehouse and port automation systems, construction and mining machinery, as well as tactical and defense systems operating in GPS-denied environments where reliability is essential.

PARKING STRUCTURE | ANELLO VS COMPETITOR 1

ANELLO Parking Structure

Fig. 2: Performance of ANELLO GNSS INS vs. Competitor 1 at Levi’s Stadium Parking Garage, Santa Clara

CONCLUSION

This case study demonstrates the ANELLO GNSS INS’s outstanding capabilities in GPS-denied environments. Whether deployed in dense urban settings, underground infrastructure, or complex industrial sites, ANELLO provides reliable navigation with: 
  • Sub-meter accuracy without relying on GPS 
  • Reduced dependence on LiDAR or vision-based sensors 
  • Proven cost-effectiveness compared to legacy FOG systems 

The Levi’s Stadium parking structure provided an extreme GPS-denied scenario through its dense concrete and signal blockage. Despite these challenges, the ANELLO GNSS INS maintained an exceptionally low cross-track error of just 3 meters over a 750-meter drive, outperforming a leading competitor in the field.

When your autonomous system demands rock-solid reliability, built-in redundancy, and pinpoint precision, even in the harshest navigation environments, the ANELLO GNSS INS rises to the challenge. Ready to elevate your navigation capabilities? Let’s talk.

Watch the full video here or contact us at info@anellophotonics.com to learn more.