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Cold Chain Why GNSS Dies Inside a Reefer Container — and What Actually Works

A sealed reefer is close to the worst RF environment a positioning device can face. The physics of why GNSS fails inside, why the cellular link survives, and the fallback chain — Wi-Fi scan, cell-ID, disciplined logging — that working trackers actually use.

August 25, 2026 10 min read min read

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