v0.4.0 — P3: Propagation, DVB-S2, Trades, Network Sim, Viz

What's New

ITU-R Propagation Plugins

• P.618 Rain Attenuation — frequency-dependent specific attenuation with P.838 coefficients
• P.676 Gaseous Absorption — dry-air (O2) + water-vapor absorption
• Tropospheric Scintillation — fade margin with inverse Gaussian quantile

DVB-S2 Modem

• 28 built-in ModCod schemes (QPSK 1/4 through 32APSK 9/10)
• Analytic BER/BLER waterfall curves
• Config-driven modem builder

Trade Studies

• Design of Experiments (LHS, full factorial, random sampling)
• Batch evaluation runner with optional parallelism
• Pareto front extraction and visualization
• CLI commands: opensatcom doe, batch, pareto

Network Traffic Tier 3

• Traffic demand profiles (constant, ramp, burst)
• Proportional fair and round-robin schedulers
• NetworkWorldSim with per-user throughput and satisfaction metrics

Visualizations

• Plotly interactive: link margin timeline, beam coverage heatmap, 3D rain surface, constellation polar plot, Pareto scatter, parallel coordinates
• Seaborn statistical: margin distribution, ModCod waterfall, availability heatmap

CI/CD & Publishing

• GitHub Actions: test matrix (Python 3.10-3.12), ruff lint, mypy type-check
• PyPI trusted publishing workflow

Jupyter Tutorials

• 5 notebooks with Google Colab badges covering quickstart through trade studies

Documentation

• README with badges, Colab links, citation section
• CITATION.cff for GitHub "Cite this repository"
• Quickstart guide in docs/

268 tests passing across unit, golden, and integration suites.

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pip install opensatcom