GDD Stage Threshold Lookup
Audit actual observed heat-sum chronology against caller ordered stage thresholds, using first observed attainment and −1 censoring; does not duplicate GDD accumulation, interpolate phenology or establish biological stage.
Description
Heat-sum thresholds can be audited against recorded chronology.
Heat-sum thresholds can be audited against recorded chronology. First observed attainment is different from interpolated phenology.1
Enter nonempty aligned nonnegative nondecreasing heat sums and strictly increasing nonnegative day ordinals, unique stage IDs and aligned strictly increasing nonnegative thresholds. Return first observed days and unachieved IDs.
When to use GDD Stage Threshold Lookup
Use GDD Stage Threshold Lookup when you need to evaluate the supplied records under the calculation and evidence rules below. No GDD accumulation, biological stage or interpolation is performed.
Prepare the measured vineyard records, aligned lists and independently verified local limits or catalog requested. Keep units, crop stages and observation periods consistent.
How to use GDD Stage Threshold Lookup and understand its results
- Prepare the measured vineyard records, aligned lists and independently verified local limits or catalog requested. Keep units, crop stages and observation periods consistent.
- Enter observedAccumulatedHeatSumCelsiusDays, observedDayOrdinals, callerStageIds, callerStageHeatThresholds using the field table and calculation rules, then run the tool.
- Read firstObservedStageDayOrdinals, stagesNotReachedInObservations. 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 |
|---|---|---|---|
| observedAccumulatedHeatSumCelsiusDays | Observed accumulated heat sum celsius days | list of number | Required |
| observedDayOrdinals | Observed day ordinals | list of number | Required |
| callerStageIds | Caller stage ids | list of string | Required |
| callerStageHeatThresholds | Caller stage heat thresholds | list of number | Required |
Enter nonempty aligned nonnegative nondecreasing heat sums and strictly increasing nonnegative day ordinals, unique stage IDs and aligned strictly increasing nonnegative thresholds. Return first observed days and unachieved IDs.
stageDay=first observed ordinal with heatSum≥threshold; absent→−1 Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| firstObservedStageDayOrdinals | First observed stage day ordinals | list of number |
| stagesNotReachedInObservations | Stages not reached in observations | list of string |
{
"input": {
"observedAccumulatedHeatSumCelsiusDays": [
0,
100,
200
],
"observedDayOrdinals": [
0,
10,
20
],
"callerStageIds": [
"a",
"b",
"c"
],
"callerStageHeatThresholds": [
50,
150,
250
]
},
"output": {
"firstObservedStageDayOrdinals": [
10,
20,
-1
],
"stagesNotReachedInObservations": [
"c"
]
}
}Limitations and assumptions
No GDD accumulation, biological stage or interpolation is performed.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Vine Age Full Production Timeline Lookup: Production maturity can be summarized by the first observed cohort age meeting a chosen yield criterion. Observational attainment is distinct from a predicted age. For a complementary task, use Bench Graft Callusing Degree Days Calculator: Callusing thermal exposure accumulates above a selected base over measured intervals. A temperature cap limits each interval contribution.
References
-
GDD Stage Threshold Lookup — tool.io
Similar or alternative tools
- Vine Age Full Production Timeline Lookup
Production maturity can be summarized by the first observed cohort age meeting a chosen yield criterion. Observational attainment is distinct from a predicted age.
- Bench Graft Callusing Degree Days Calculator
Callusing thermal exposure accumulates above a selected base over measured intervals. A temperature cap limits each interval contribution.