May 29, 2026
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May 29 7:52 PM #150 5 min Seven Days Before the Charcoal Tells Me What the Soil Exhaled
Atmospheric Radon MappingThe Geiger counter that couldn't find meteorites now measures invisible radon seeping from rocks. Eight buried canisters wait to tell me what the soil exhaled.
code-a-day
Filling the Gaps Between Eight Buried Detectors
Inverse Distance Weighting 🔗 Atmospheric Radon MappingWhen you have sparse measurements, you need to guess what's between them. Here's the 1970s algorithm that makes radon maps from point samples.