SYNTHETIC DEMONSTRATION — not measured farm evidence.

# Streamline Greenhouse Analyst

Calculation version: 0.1.0

Window: 2026-09-01T00:00:00.000Z to 2026-09-15T00:00:00.000Z

## What the records establish

1345 source rows; 1 separate sensor series. Evidence quality reflects supplied labels, not independent validation.

## Calculations

### DEMO-FARM / North / climate-demo.csv (simulated)

| Metric | Weighted mean | Unit | Coverage | Time within target |
| --- | --- | --- | --- | --- |
| temperature | 23.6121 | C | 100% | No target |
| rh | 65.0037 | % | 100% | No target |
| ppfd | 250 | umol/m2/s | 100% | No target |
| air\_vpd\_kpa | 1.0111 | kPa | 100% | No target |
| dew\_point\_c | 16.6198 | C | 100% | No target |
| dew\_margin\_c | 6.9924 | C | 100% | No target |

Observed light: 302.4 mol/m²; observed\_window\_total\_not\_daily\_DLI.

### Matching-period comparison

| Zone / metric | Prior mean | Current mean | Change | Unit |
| --- | --- | --- | --- | --- |
| North / temperature | 22.2243 | 25 | 2.7757 | C |
| North / rh | 60.0074 | 70 | 9.9926 | % |
| North / ppfd | 250 | 250 | 0 | umol/m2/s |
| North / air\_vpd\_kpa | 1.0719 | 0.9503 | -0.1216 | kPa |
| North / dew\_point\_c | 14.0938 | 19.1457 | 5.0518 | C |
| North / dew\_margin\_c | 8.1305 | 5.8543 | -2.2761 | C |

### Logged irrigation

| Site / zone | Event count | Runtime seconds | History coverage | Estimated liters |
| --- | --- | --- | --- | --- |
| DEMO-FARM / North | 14 | 6720 | unknown | Unknown |

Logged activity does not establish measured delivery or soil moisture.

## Assumptions

- integration: Linear interpolation between valid consecutive points, trapezoidal integration; no integration over gaps exceeding max\_gap\_minutes. No endpoint extrapolation.
- max\_gap\_minutes: 15
- coverage\_denominator: Elapsed seconds in the requested window; target fractions use observed seconds.
- day\_basis: UTC calendar days; partial windows are not complete-day DLI. Local civil-day/DST DLI not implemented.
- vapour: FAO-56 Eq.11 at each observation; RH gives actual vapour pressure. Dew point algebraically inverts this liquid-water equation. Derived values restricted to air temperatures 0–50 C; dew point is an approximation, not a measured surface temperature.
- leaf: Leaf VPD requires a supplied leaf temperature. Negative leaf VPD can indicate condensation potential and is preserved.
- irrigation: Counts and runtimes describe logged controller activity, not measured flow or proof of delivery. Unknown history is not dry soil. Event totals use starts inside the window; runtimes are not clipped.

## Possible explanations

- An observed environmental change may reflect weather, equipment, sensor placement, calibration or crop changes. These records alone cannot establish the cause.
- Dew-point proximity is not proof of wet leaves or disease. Sparse ambient sensors do not establish airflow or validated CFD.

## Missing or rejected evidence

- {"code":"no\_operating\_targets\_supplied","reason":"No in-target or out-of-target classification is possible."}
- {"code":"no\_leaf\_temperature","reason":"Leaf VPD and leaf-surface condensation cannot be established."}
- {"code":"measurement\_method\_missing","reason":"Confirm sensor method, placement and calibration when interpreting changes."}
- {"code":"future\_observations\_check\_clock","site":"DEMO-FARM","zone":"North","source\_id":"climate-demo.csv","evidence\_kind":"simulated"}

## Next measurements or inspections

- Check irrigation history export and physically verify delivery or measure root-zone moisture if irrigation status matters. — DEMO-FARM / North / source rows irrigation-demo.csv:2, irrigation-demo.csv:3, irrigation-demo.csv:4, irrigation-demo.csv:5, irrigation-demo.csv:6, irrigation-demo.csv:7, irrigation-demo.csv:8, irrigation-demo.csv:9 (full list in JSON)

## Sources and correction history

- climate-demo.csv; evidence simulated
- irrigation-demo.csv; evidence simulated
- FAO Irrigation and Drainage Paper 56, chapter 3, Eq.11 and humidity relationships — https://www.fao.org/4/x0490e/x0490e07.htm
- Photon integration: 1 micromole = 10^-6 mole; observed total = integral(PPFD dt)/1e6

The companion report.json retains the complete source mappings, normalized/original values, evidence row references, corrections, and all flags. No sample records substitute for failed uploads.