Documentation, standards traceability, and engineering references for working with HAPIS products.
Guides and references for the Link Budget API, SaaS Dashboard, and NTN Simulator.
Quick-start guides, API references, authentication, and integration examples for all three products.
Open documentation →Technical white papers on the engine's methodology and validation — currently in preparation.
See white-paper status →The ITU-R and 3GPP standards behind the engine, with a revisions tracker in development.
See standards tracker →Each recommendation maps to a named, inspectable output — every result is traceable to its source standard, with no black box.
| ITU-R P.525 — Free Space Path Loss | fspl_db |
| ITU-R P.676 — Atmospheric Gas Absorption | gas_loss_db |
| ITU-R P.838-3 — Rain Attenuation | rain_loss_db |
| ITU-R P.840 — Cloud Attenuation | cloud_loss_db |
| ITU-R P.2108 — Clutter Loss | clutter term in coverage maps |
| 3GPP TR 38.811 — NR Support for NTN | NTN channel: path loss & shadowing |
| 3GPP TR 38.821 — NTN Solutions | NTN KPIs: handover & beam management |
| 3GPP TR 38.822 — NTN RF Requirements | Doppler & timing-advance bounds |
Notes on HAPS RF engineering, NTN design, and propagation modeling.
We're preparing technical write-ups on link-budget methodology and NTN simulation.
Browse the documentation →