Inspect a local observation CSV for missing values, duplicate or unordered UTC times and range flags.
Use this tool
Preparing interactive controls…
Introduction & principle
Required headers define units: time_utc,temp_c,rh_percent,pressure_hpa. Screening ranges: −90–60°C, 0–100% RH, 300–1100 hPa. These checks cannot establish instrument accuracy, infer intended units or fix source data. Additional columns are ignored.
Worked example
The example intentionally repeats 09:00Z, includes 105% RH and omits one pressure value. All three conditions are flagged with their CSV record number (header is record 1; empty lines are ignored).
Detailed usage guide
1Paste CSV or select a local file (under 1 MB, at most 1,000 data rows). No file is uploaded.
2Use the required unit-bearing headers; quote cells containing commas.
3Review every flagged row. Export the JSON report if useful; the original CSV is unchanged.
Common problems & FAQ
Does a clean result prove the data is correct?
No. Clean means only that the configured checks found no flags. A plausible Fahrenheit value mislabeled as Celsius may still pass. Verify units, exposure and instruments independently.
