This repository is archived. Active development continues at TIN.
v0.3.9 — Life-Saving Cislunar DTN Alpha
Critical emergency communication (medical alerts, rover aborts, distress signals) reaches the intelligent ELFO hub in under 3.4 minutes worst-case.
Compared to emerging lunar relay concepts like Intuitive Machines LDN or a hypothetical Starlink Lunar constellation, TIN offers a lean, polar-optimized, fully open-source solution that achieves 100 % South Pole coverage with just 8 smallsats + existing ELFO infrastructure.
Run it:
python scripts/tin_v0.3.8_final_intergrated.py --polar_sats 8 --bundles 300 --storm_prob 0.08
# Tolerant Interlunar Network (TIN)
**v0.3.6** — 19 February 2026
Hybrid Polar + Lunar Pathfinder ELFO architecture for persistent South Pole and far-side lunar coverage using DTN + AI routing. Lunar demonstrator for a generalizable solar-system tolerant network.
**Author:** J. Councilman
**LSIC Member — Crosscutting Capabilities Focus Group**
---
### Heritage & Foundations
TIN builds directly on the Interplanetary Internet (IPN) and Delay-Tolerant Networking (DTN) research originated at NASA JPL in 1998–2003 by Vint Cerf, Scott Burleigh, and team — explicitly designed to solve Earth-Sun conjunction radio blackouts and long/variable delays. It also draws strategic inspiration from Lynn D. Harper's foundational NASA Ames work on low-cost lunar settlement and sustained surface operations.
### Current Baseline (locked)
- 6–8 smallsats in 400 km circular 90° polar orbits
- Primary DTN/AI hub: real Lunar Pathfinder ELFO (frozen elliptical, perilune over South Pole)
- 28-day simulation results (elev >5°): South Pole 99.9–100.0 %, Far Side 63.2–68.5 %
### Hybrid Coverage Results (28-day avg, elev >5°)
| Configuration | South Pole (%) | Far-Side (%) |
|---|---|---|
| Pure Polar 6 sats @ 400 km | 99.6 | 46.4 |
| Pure Polar 8 sats @ 400 km | 100.0 | 54.4 |
| **Hybrid 6 polar + Pathfinder** | **99.9** | **63.2** |
| **Hybrid 8 polar + Pathfinder** | **100.0** | **68.5** |
**Download full table:** [data/Quick_Summary_Table_results/tin_hybrid_polar.csv](data/Quick_Summary_Table_results/tin_hybrid_polar.csv)
### Coverage Maps (28-day avg, elev >5°)
**South Pole — Hybrid 6 Polar + ELFO**
**Far-Side — Hybrid 6 Polar + ELFO**
**Far-Side — Hybrid 8 Polar + ELFO**
### Repository Contents
README.md — This file docs/TIN_TechMemo_v0.3.6.pdf — Technical Memo (5-page, results + maps) TIN_Lunar_Whitepaper_v0.3.6.md — Lunar Technical Whitepaper (9-page) TIN_Mars_Whitepaper_v0.3.6.md — Mars Generalization Whitepaper (5-page) TIN_Helio_Whitepaper_v0.3.6.md — Solar-System Vision Whitepaper (6-page) TIN_LSIC_LOI_v0.3.6.md — LSIC Letter of Intent PitchDeck_Outline_v0.3.6.md — 10-slide pitch deck outline tin_coverage_map.py — Simulation CLI tool data/Quick_Summary_Table_results/tin_hybrid_polar.csv — Full results table results/tin_hybrid_.png — Coverage maps results/tin_400km_.png — Pure polar coverage maps archive/ — Previous version files
### Try It Yourself
```bash
python tin_coverage_map.py --polar_sats 8 --region farside --include_elfo --output my_map.png
- Cerf, V. et al., "Delay-Tolerant Networking Architecture," RFC 4838, Apr 2007.
- Fall, K., "A Delay-Tolerant Network Architecture for Challenged Internets," SIGCOMM 2003.
- Bhasin et al., NASA SCaN Lunar Relay Studies, 2006–2008.
- Harper, L.D. et al., "Life Support for a Low-Cost Lunar Settlement," New Space, 2016.
- Lunar Pathfinder mission documentation (ESA/SSTL, 2026).
Open-source. Released for the benefit of the lunar and interplanetary communications community.
TIN is an independent research project. Not affiliated with NASA, ESA, or JHU/APL. LSIC membership does not imply endorsement.