Effective Atmospheric Emissivity Lookup
Observed/calibrated clear-sky same-band atmospheric emissivity vs explicit humidity/temperature reference. Exact caller verified numeric reference; signed deviations retained. Caller independently establishes matching units, evidence, method edition and applicability; output is not compliance, diagnosis, work-safety approval, geological identity or validated hazard prediction.
Description
Effective atmospheric emissivity represents longwave emission relative to a chosen thermal reference.
Effective atmospheric emissivity represents longwave emission relative to a chosen thermal reference.1
Its calibration depends on the observation and parametrization being used. The tool retrieves your supplied numeric reference and reports a signed observed-minus-reference difference.
When to use Effective Atmospheric Emissivity Lookup
Use this tool to compare an observation with its exact numeric reference. Establish the observation method, units, averaging period and applicable reference or calibration.
How to use Effective Atmospheric Emissivity Lookup and understand its results
- Establish the observation method, units, averaging period and applicable reference or calibration.
- Enter callerVerifiedAtmosphericEmissivityKeys, callerVerifiedAtmosphericEmissivityValues, queryAtmosphericEmissivityKey, observedAtmosphericEmissivityValue, using the field meanings and rules below, then run the tool.
- Read callerReferenceValue, signedObservedMinusReference, using the output meanings and calculation rules below. Confirm that the exact matched record is the one whose source and context apply.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerVerifiedAtmosphericEmissivityKeys | Caller verified atmospheric emissivity keys | list of string | Required |
| callerVerifiedAtmosphericEmissivityValues | Caller verified atmospheric emissivity values | list of number | Required |
| queryAtmosphericEmissivityKey | Query atmospheric emissivity key; use the exact reference token or coordinate domain stated below | string | Required |
| observedAtmosphericEmissivityValue | Observed atmospheric emissivity value | number | Required |
Require nonempty aligned unique nonblank reference keys and reference fractions in [0,1], plus an observed fraction in [0,1]. Match the query key exactly, reject an unknown key, and return its reference fraction and the signed observed-minus-reference difference.
reference=fractions[indexOf(keys,query)]; difference=observed−reference Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| callerReferenceValue | Caller reference value | number |
| signedObservedMinusReference | Signed observed minus reference; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"callerVerifiedAtmosphericEmissivityKeys": [
"a",
"b"
],
"callerVerifiedAtmosphericEmissivityValues": [
0.2,
0.4
],
"queryAtmosphericEmissivityKey": "b",
"observedAtmosphericEmissivityValue": 0.5
},
"output": {
"callerReferenceValue": 0.4,
"signedObservedMinusReference": 0.09999999999999998
}
}Limitations and assumptions
The observations and reference conditions must be independently established. This result does not supply missing measurements, uncertainty or an official warning. Reference records and their claimed verification are supplied by the caller; the tool does not retrieve or verify them.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries; ordinary string lists allow at most 128 strings of 128 UTF-16 units each; numeric matrices allow at most 128 rows and 128 columns, subject to narrower requirements above.
Alternative or Complementary methods
For a related step, use Downwelling Longwave Clear Sky Parametrization Calculator: An effective-emissivity longwave model scales blackbody emission by an atmospheric emissivity. For a complementary comparison, use Albedo Surface Type Table Lookup: Albedo is a reflected fraction defined for particular illumination and observation conditions.
References
-
Effective Atmospheric Emissivity Lookup — tool.io
Similar or alternative tools
- Downwelling Longwave Clear Sky Parametrization Calculator
An effective-emissivity longwave model scales blackbody emission by an atmospheric emissivity.
- Albedo Surface Type Table Lookup
Albedo is a reflected fraction defined for particular illumination and observation conditions.