tide-lab low-cost sea-level sensing phase 2 · calibration
Tide Lab
How cheap pressure gauges can be kept honest with one co-located reference. Everything here rebuilds from pinned data.
Correct weekly. Inspect the seventh.the whole program in five words
the result · seven gauges, twelve weeks, one reference
reportWith a co-located reference read at least weekly, pressure-gauge drift stays under 4 mm over twelve weeks for six of seven units. The seventh exceeded the bound with a blocked vent.
papers · 3 of 4
preprint-firstDrift in pressure gauges: a summer census 18 pp
Seven units, twelve weeks, one acoustic reference. The bound, the exception, and what the exception was.
Biofouling and the vent path 11 pp
Why unit 7 drifted, and a housing change that removes the failure mode.
instrument · the reference
acoustic · 6-minute cadenceThe reference logged 2,016 reads with 0.4% of slots missing and no gap over one hour. Every gauge's residual is computed against it.
works · by lane
phase 1 complete · phase 2 in calibrationCalibration drift · instruments
The census above.
Cross-site check · instruments
A second harbor, three units.
Biofouling census · housing
Every vent path, photographed.
Winter deployment · open coast
Five units, the bound not held.
enter
four ways inEvery read, pinned
CSV per unit, one manifest, one digest.
Claim ledger
46 claims with status under the claim-status policy.
Seven reproducible runs
Each with its checklist and lock.
How a residual is computed
The formula, the notation, the edge cases.