Veraison To Harvest Day Span
Audit observed veraison/harvest event timeline on caller continuous day ordinals, preserving no harvest as right-censored duration; no maturity-optimum date or fixed variety calendar.
Description
Veraison marks the onset of grape ripening.
Veraison marks the onset of grape ripening. The interval to harvest is an observed timeline, and an unfinished season has a censored endpoint.1
Audit observed veraison/harvest event timeline on caller continuous day ordinals, preserving no harvest as right-censored duration; no maturity-optimum date or fixed variety calendar.
When to use Veraison To Harvest Day Span
Use this tool to audit observed veraison/harvest event timeline on caller continuous day ordinals, preserving no harvest as right-censored duration; no maturity-optimum date or fixed variety calendar.
Prepare vineyard measurements, dates or block records for the intended growing period. Keep weights, counts and weather observations in the stated units.
How to use Veraison To Harvest Day Span and understand its results
- Prepare vineyard measurements, dates or block records for the intended growing period. Keep weights, counts and weather observations in the stated units.
- Enter calendarDayOrdinals, veraisonEventFlags, harvestEventFlags using the field table and calculation rules, then run the tool.
- Read observedVeraisonToHarvestDays, harvestRightCensored, veraisonObservedOrdinal, observedOrCensoredHarvestOrdinal. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| calendarDayOrdinals | Calendar day ordinals | list of number | Required |
| veraisonEventFlags | Veraison event flags | list of number | Required |
| harvestEventFlags | Harvest event flags | list of number | Required |
Align increasing nonnegative integer day ordinals with binary event flags. Require exactly one veraison and at most one harvest, which cannot precede veraison. Without harvest, use the final ordinal and set right-censored true.2
Paired lists must be nonempty and have equal lengths. Each sequence checked for increasing order must contain at least two strictly increasing values.
duration = observed harvest ordinal − veraison ordinal, or last observation − veraison Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedVeraisonToHarvestDays | Observed veraison to harvest days | number |
| harvestRightCensored | Harvest right censored | boolean |
| veraisonObservedOrdinal | Veraison observed ordinal | number |
| observedOrCensoredHarvestOrdinal | Observed or censored harvest ordinal | number |
{
"input": {
"calendarDayOrdinals": [
100,
200,
300
],
"veraisonEventFlags": [
1,
0,
0
],
"harvestEventFlags": [
0,
1,
0
]
},
"output": {
"observedVeraisonToHarvestDays": 100,
"harvestRightCensored": false,
"veraisonObservedOrdinal": 100,
"observedOrCensoredHarvestOrdinal": 200
}
}Limitations and assumptions
Continuous ordinals must span year boundaries correctly; the duration does not identify optimal maturity.
Numbers and computed results must be finite; overflow produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Harvest Window Optimal Days Brix Range Finder: Find all piecewise-linear observed Brix-compatible intervals under caller range, retaining disconnected/reversed trajectories and boundaries; sugar compatibility alone is not optimal harvest, maturity, acid balance or validated future scheduling. For a complementary task, use Sugar Accumulation Brix Per Week: Track measured signed Brix changes on actual unequal sampling periods, retaining decreases; not sugar production mass, alcohol conversion or a harvest-ready prediction.
Further background: Veraison to harvest: vineyard and winery considerations.
References
-
Veraison to harvest: vineyard and winery considerations — Penn State Extension
-
Veraison To Harvest Day Span — tool.io
Similar or alternative tools
- Harvest Window Optimal Days Brix Range Finder
Find all piecewise-linear observed Brix-compatible intervals under caller range, retaining disconnected/reversed trajectories and boundaries; sugar compatibility alone is not optimal harvest, maturity, acid balance or validated future scheduling.
- Sugar Accumulation Brix Per Week
Track measured signed Brix changes on actual unequal sampling periods, retaining decreases; not sugar production mass, alcohol conversion or a harvest-ready prediction.