← The evidence ledger
Evidence row 2201219
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://satellite-catalog.x402tookit.com/ground-track-period
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 73e9b361f4eb0857326b32786640428d6bb89f3456a9b94b2a522da9b72e2353
- Leaf
- 0xf9b581c296e5ef7cd734e3092d2b1442974e4498cf3c3bdeb959fe31363a2cd4
What was observed
{
"endpoints": [
[
"x402",
"https://satellite-catalog.x402tookit.com/ground-track-period"
]
],
"name": "Satellite Catalog",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Ground-track westward shift per orbit and repeat-cycle estimate (orbits per days) from an orbital period in minutes.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"day": "solar",
"max_days": 30,
"period_min": 98.88,
"tolerance_deg": 0.5
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-21T00:37:07.623Z",
"circularAltitudeKm": 705.1,
"dayLengthMin": 1440,
"dayModel": "solar",
"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.",
"earthRotationDegPerDay": 360.9856,
"equatorShiftPerOrbitKm": 2751.8,
"netDriftWestPerOrbitDeg": 24.72,
"notChecked": [
"nodal precession from J2: pick day=solar to model a sun-synchronous orbit, otherwise the answer is the Keplerian (non-precessing) track",
"drag and orbit maintenance, which change the period over time",
"…2 more"
],
"orbitsPerDay": 14.5631,
"periodMin": 98.88,
"reasons": [
"day=solar: the day is 1440 min, the usual model for sun-synchronous orbits whose plane precesses with the Sun."
],
"repeatCycles": [
{
"days": 16,
"longitudeErrorDeg": 0.24,
"orbits": 233
}
],
"semiMajorAxisKm": 7083.25,
"shiftWestPerOrbitDeg": 24.72,
"source": "Earth rotation 360.9856 deg per solar day; ground-track geometry computed locally",
"summary": "Each orbit the track shifts 24.72 deg west (2751.8 km at the equator); it repeats after 233 orbits in 16 days (error 0.24 deg).",
"verdict": "REPEAT_CYCLE_FOUND"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"day": {
"description": "inertial (default, sidereal day) or solar (use for sun-synchronous orbits)",
"type": "string"
},
"max_days": {
"description": "Longest repeat cycle to search, 1 to 60 days (default 30)",
"type": "integer"
},
"period_min": {
"description": "Orbital period in minutes (80 to 10000)",
"type": "number"
},
"tolerance_deg": {
"description": "Allowed longitude mismatch at the cycle end, 0.01 to 5 degrees (default 0.5)",
"type": "number"
}
},
"required": [
"period_min"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"circularAltitudeKm": {
"type": [
"null",
"number"
]
},
"dayLengthMin": {
"type": [
"null",
"number"
]
},
"dayModel": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"earthRotationDegPerDay": {
"type": [
"null",
"number"
]
},
"equatorShiftPerOrbitKm": {
"type": [
"null",
"number"
]
},
"netDriftWestPerOrbitDeg": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"orbitsPerDay": {
"type": [
"null",
"number"
]
},
"periodMin": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"repeatCycles": {
"items": {
"properties": {
"days": {
"type": [
"null",
"number"
]
},
"longitudeErrorDeg": {
"type": [
"null",
"number"
]
},
"orbits": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"semiMajorAxisKm": {
"type": [
"null",
"number"
]
},
"shiftWestPerOrbitDeg": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T04:08:06.2Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-02T04:08:05.934Z"
},
"resource": "https://satellite-catalog.x402tookit.com/ground-track-period",
"serviceName": "Satellite Catalog",
"tags": [
"orbit",
"ground-track",
"repeat-cycle",
"calculator"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Ground-track westward shift per orbit and repeat-cycle estimate (orbits per days) from an orbital period in minutes."
}What the leaf hashes
{"body":"73e9b361f4eb0857326b32786640428d6bb89f3456a9b94b2a522da9b72e2353","id":2201219,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646801317927,"prev":null,"subject":"x402_bazaar:https://satellite-catalog.x402tookit.com/ground-track-period","subject_kind":"source_record"}Proof
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