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DRT&R: Direct Radar Teach & Repeat

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arXiv:2609.17766v1 Announce Type: new Abstract: Radar-based navigation is appealing for its robustness to adverse conditions involving airborne particles, such as precipitation, dust, fog, and smoke, that can cause lidar-based systems to fail. Recently, direct methods that retain and use the entire radar scan rather than sparse points have improved on-road global localization performance. However, they have yet to be deployed in off-road environments or in closed-loop systems. Additionally, even direct global maps may lose information: their global nature leads to a smoothing out of viewpoint-dependent radar artifacts, which can provide pose information when mapping and localization occur along similar trajectories. This paper introduces Direct Radar Teach & Repeat (DRT&R): a direct spinn…

SourcearXiv RoboticsAuthor: Alexander Krawciw, Daniil Lisus, Cedric Le Gentil, Timothy D. Barfoot
DRT&R: Direct Radar Teach & Repeat
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[Submitted on 15 Sep 2026]

Title:DRT&R: Direct Radar Teach & Repeat

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Abstract:Radar-based navigation is appealing for its robustness to adverse conditions involving airborne particles, such as precipitation, dust, fog, and smoke, that can cause lidar-based systems to fail. Recently, direct methods that retain and use the entire radar scan rather than sparse points have improved on-road global localization performance. However, they have yet to be deployed in off-road environments or in closed-loop systems. Additionally, even direct global maps may lose information: their global nature leads to a smoothing out of viewpoint-dependent radar artifacts, which can provide pose information when mapping and localization occur along similar trajectories. This paper introduces Direct Radar Teach & Repeat (DRT&R): a direct spinning radar-based navigation stack that maximizes the amount of retained information by combining direct radar processing with local mapping. DRT&R yields state-of-the-art (SOTA) localization performance in both on-road and off-road environments. Using 344 km of on-road data and 20 km of off-road data, DRT&R is able to localize to within 4 cm in most on-road and off-road conditions, and 12 cm in geometrically degenerate and sparse environments. DRT&R is also evaluated autonomously in closed loop with an MPC controller for more than 10 km using a Clearpath Warthog off-road vehicle, demonstrating that it runs in real time and achieves SOTA tracking performance for off-road radar navigation.

Comments: 8 pages, 7 figures, paper under review

Subjects:

Robotics (cs.RO)

Cite as: arXiv:2609.17766 [cs.RO]

(or arXiv:2609.17766v1 [cs.RO] for this version)

https://doi.org/10.48550/arXiv.2609.17766

arXiv-issued DOI via DataCite (pending registration)

Submission history

From: Daniil Lisus [view email] [v1] Tue, 15 Sep 2026 19:13:53 UTC (3,628 KB)

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  • arXiv:2609.17766v1 Announce Type: new Abstract: Radar-based navigation is appealing for its robustness to adverse conditions involving airborne particles, such as precipitation, d…

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