Description
Measure the signed duration of a recorded garden sun window.
City-garden planning combines nominal container geometry, route lengths, water masses, access sides and shared-resource accounting. A litre quantity becomes mass only with a density, while reach depends on the declared accessible sides. Simple margins and shares organize supplied measurements; material behavior, structural capacity and individual access needs require separate assessment.
Measure the signed duration of a recorded garden sun window.
When to use this tool
Use City Garden Sun Window Duration when you already have sunWindowStartMinutes, sunWindowEndMinutes and need to measure the signed duration of a recorded garden sun window.
How to use the tool and how it works
- Enter sunWindowStartMinutes, sunWindowEndMinutes. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read signedGap. Use the output convention below.
Return sunWindowEndMinutes-sunWindowStartMinutes on one supplied time coordinate.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| sunWindowStartMinutes | Sun Window Start Minutes | Required. Finite number. |
| sunWindowEndMinutes | Sun Window End Minutes | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| signedGap | Supplied end-minus-start minutes; no overnight rollover is applied. | Required. Finite number. |
{
"input": {
"sunWindowStartMinutes": 12,
"sunWindowEndMinutes": 17
},
"output": {
"signedGap": 5
}
}Limitations and assumptions
- Negative durations are retained; no overnight correction, sun-path calculation, shading model or crop-light requirement is inferred.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Measure the actual bed, container and access routes before applying nominal dimensions. For roof loading or water delivery, use the full support or hydraulic calculation; reconcile volunteer and harvest records over one common accounting period.
References
Similar or alternative tools
- Photo Stop Time Allocation Share
Calculate photo-stop minutes as a share of total tour time.
- Vertical Farm Lighting Hour Energy
Calculate lighting energy from supplied power and runtime.