Analemma North-South Shift Degree Component Extractor
Signed declination component displacement from caller solar positions; not full local apparent analemma coordinates.
Description
Analemma North-South Shift Degree Component Extractor: return signed north south degrees.
The north-south component of an analemma is related to the Sun's changing declination. Comparing two declinations gives a signed angular displacement.
This tool returns signed north south degrees. Use the stated units and model convention when interpreting these fields.
When to use this tool
Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.
- Check the supported input and output contract against an existing calculation or observation.
- Use the complete example to confirm units, selector spelling and result interpretation.
How to use the tool and how it works
- Enter every field in the input table using the stated units and the exact supported selector spelling where applicable.
- Run the tool. Correct input errors before interpreting an output.
- Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.
Require both declinations within -90 to +90 degrees and subtract the reference from the observed value.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observedSolarDeclinationDegrees | Observed solar declination degrees. Degrees. | Finite number; from -90 to 90 inclusive |
| referenceDeclinationDegrees | Reference declination degrees. Degrees. | Finite number; from -90 to 90 inclusive |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.signedNorthSouthDegrees | Signed north south degrees; use the stated units and sign convention. |
{
"input": {
"observedSolarDeclinationDegrees": 10,
"referenceDeclinationDegrees": -5
},
"output": {
"result": {
"signedNorthSouthDegrees": 15
}
}
}Limitations and assumptions
- The east-west component, observing time and horizon projection are not calculated.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.
References
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