Propagates a circular two-body orbit from altitude, inclination, RAAN, and initi
Propagates a circular two-body orbit from altitude, inclination, RAAN, and initial orbital phase; rotates Earth at a fixed sidereal rate; and samples ground-station elevation. It ignores eccentricity, perturbations, epoch-dependent Greenwich angle, refraction, ellipsoid shape, terrain, and antenna masks, so it is a planning estimate rather than operational ephemeris.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
1041 msmedian answer time
$0.004listed price per call
$0.004price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://space.halowerk.com/v1/satellite-pass
| Category | Everything else |
|---|---|
| Provider host | space.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.004 | 1041 ms |
Example input (from the provider)
{
"body": {
"altitude_km": 550,
"duration_seconds": 43200,
"ground_latitude_deg": 52.52,
"ground_longitude_deg": 13.405,
"inclination_deg": 53,
"initial_phase_deg": 210,
"minimum_elevation_deg": 10,
"raan_deg": 15,
"step_seconds": 30
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"altitude_km": {
"description": "Circular altitude above a spherical Earth.",
"maximum": 100000,
"minimum": 100,
"type": "number"
},
"duration_seconds": {
"maximum": 172800,
"minimum": 10,
"type": "integer"
},
"ground_latitude_deg": {
"maximum": 90,
"minimum": -90,
"type": "number"
},
"ground_longitude_deg": {
"maximum": 180,
"minimum": -180,
"type": "number"
},
"inclination_deg": {
"maximum": 180,
"minimum": 0,
"type": "number"
},
"initial_phase_deg": {
"description": "Argument of latitude at t=0.",
"maximum": 360,
"minimum": -360,
"type": "number"
},
"minimum_elevation_deg": {
"maximum": 90,
"minimum": -5,
"type": "number"
},
"raan_deg": {
"description": "Right ascension of ascending node relative to Greenwich at t=0.",
"maximum": 360,
"minimum": -360,
"type": "number"
},
"step_seconds": {
"maximum": 3600,
"minimum": 10,
"type": "integer"
}
},
"required": [
"altitude_km",
"inclination_deg",
"raan_deg",
"initial_phase_deg",
"ground_latitude_deg",
"ground_longitude_deg",
"duration_seconds",
"step_seconds",
"minimum_elevation_deg"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}