← The evidence ledger
Evidence row 2201304
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://site-climate.x402tookit.com/degree-days
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- f110ac716f8a420c302c4b210b675c78acdc8478dcb08a7114784f3b7e0dd059
- Leaf
- 0x359dd90743cdcb2d46791869285e9b695e3c669c256be1e616dc8b8e188a088e
What was observed
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],
"description": "Estimated heating and cooling degree days by month for a location from NASA temperature normals, in Celsius and Fahrenheit.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"baseTempC": 18.3,
"lat": 40,
"lon": -83
},
"type": "http"
},
"output": {
"example": {
"annualCddC": 422,
"annualCddF": 760,
"annualHddC": 3085,
"annualHddF": 5553,
"asOf": "2026-10-11T14:45:36.820Z",
"attribution": "Data: NASA Langley Research Center POWER Project (power.larc.nasa.gov), funded through the NASA Earth Science Directorate Applied Science Program.",
"baseTempC": 18.3,
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"dominant": "heating",
"latitude": 40,
"longitude": -83,
"months": [
{
"cddC": 0,
"hddC": 649,
"meanTempC": -2.6,
"month": "January"
},
{
"cddC": 0,
"hddC": 557,
"meanTempC": -1.4,
"month": "February"
}
],
"notChecked": [
"daily temperature swings: degree days from MONTHLY means understate the true totals, especially in shoulder months, because a cold night and a warm afternoon both count in real degree-day sums",
"your building's real balance point and any utility's own degree-day figures",
"…1 more"
],
"reasons": [
"Data: NASA Langley Research Center POWER Project (power.larc.nasa.gov), funded through the NASA Earth Science Directorate Applied Science Program.",
"Estimated from monthly mean temperatures x days in the month, so treat them as a lower bound for real daily-based totals.",
"…1 more"
],
"source": "NASA POWER",
"sourceUrl": "https://power.larc.nasa.gov/",
"summary": "About 3085 heating and 422 cooling degree-days C a year (5553 HDD and 760 CDD in Fahrenheit) at a 18.3 C base; heating dominates.",
"verdict": "ESTIMATE"
},
"type": "json"
}
},
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"latitude": {
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},
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},
"lastUpdated": "2026-11-02T04:06:04.722Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-02T04:06:04.559Z"
},
"resource": "https://site-climate.x402tookit.com/degree-days",
"serviceName": "Site Climate",
"tags": [
"degree-days",
"hvac",
"heating",
"cooling"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Estimated heating and cooling degree days by month for a location from NASA temperature normals, in Celsius and Fahrenheit."
}What the leaf hashes
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Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af