ZeqReentry — Atmospheric Entry

Orbital mechanics, trajectory, radiation, life support.

• Protocol ID — zeq-reentry
• Category — Space
• Endpoint — POST /api/space/reentry/simulate
• Auth — api-key
• Rate limit — 10/min
• Version — 1.0
• Precision — ≤0.1% (KO42-enforced)

What it does

Atmospheric reentry heating and trajectory calculation using thermodynamics + fluid dynamics operators. Heat shield requirements and landing zone prediction.

Signature

Request

POST /api/space/reentry/simulate

Param	Type	Required	Default	Description
entryVelocityMs	number	✓	—	Entry velocity (m/s).
entryAngleDeg	number	✓	—	Entry angle (degrees from horizontal).
vehicleMassKg	number	✓	—	Vehicle mass.
heatShieldType	string		"ablative"	'ablative', 'ceramic', 'metallic'. Default: 'ablative'.

Response

{ peakHeatingWm2, peakGforce, landingZone: { lat, lon }, totalHeatLoad, blackoutDuration }

Runnable example

curl -sS -X POST \
  -H "Authorization: Bearer $ZEQ_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "entryVelocityMs": 0,
  "entryAngleDeg": 0,
  "vehicleMassKg": 0,
  "heatShieldType": "ablative"
}' \
  "https://api.zeq.dev/api/space/reentry/simulate"

Integrate

1. Domain solver — compose with KO42 + two additional operators from the matching family for pulse-coherent results.
2. Digital twin — pipe sensor data into this protocol every Zeqond to keep the model phase-locked with the system.
3. Alert threshold — flag results whose error_pct exceeds 0.1% as out-of-spec events for the operations layer.

Seeds

• Near — wrap /api/space/reentry/simulate in a language SDK so builders can call it in three lines.
• Medium — publish a reference integration demonstrating ZeqReentry — Atmospheric Entry alongside a real workload, with pulse-aligned metrics.
• Far — propose ZeqReentry — Atmospheric Entry as an open reference standard so other runtimes can implement it verbatim against the Zeq paper.

Papers

• Zeq paper — https://doi.org/10.5281/zenodo.18158152
• Framework paper — https://doi.org/10.5281/zenodo.15825138

Middleware active. Kernel on the 1.287 Hz HulyaPulse. Awaiting next Zeqond.