Astroterm is a terminal-based star map application written in C. It renders the real-time positions of stars, planets, the Moon, and constellation figures using ASCII or Unicode characters. The system computes celestial positions from the Yale Bright Star Catalog, Keplerian orbital elements, and user-specified date/time and location (latitude/longitude or city name). It projects the visible sky onto the terminal via a stereographic projection and uses ncurses for display and input. The build system is Meson with Ninja, supporting Linux, macOS, and Windows. The codebase is well-structured into separate modules for astronomy calculations (astro.c), coordinate transforms (coord.c), terminal rendering (drawing.c, term.c), and data parsing (parse_BSC5.c, city.c). It includes comprehensive unit tests using Unity and CI via GitHub Actions. The application is highly configurable through command-line arguments and demonstrates strong craftsmanship in astronomical computations and terminal graphics.
This is a full-stack, self-hosted satellite ground station, not a data-research repository, though it contains substantial orbital-data ingestion, telemetry parsing, and signal-processing components. The application connects software-defined radios (RTL-SDR, Airspy, UHD, SoapySDR, SDRplay) to a real-time web UI for satellite tracking, hardware control, IQ/waterfall visualization, demodulation, decoding, recording, and observation scheduling. The backend is Python with FastAPI/Socket.IO, SQLAlchemy/Alembic, multiprocessing workers, and pub/sub broadcaster components; the frontend is React/Redux Toolkit/Material-UI. The user-facing system manages rotators and rigs via Hamlib, propagates TLE/OMM orbital elements, predicts passes, applies Doppler correction, schedules automated observations, and exposes file browsing, telemetry analysis, and audio transcription through external AI providers.
Solar Wanderer is a browser-based 1:1 real-time solar system explorer powered by NASA JPL ephemerides. Built with Three.js 0.165 and Vite 5, it renders the entire solar system at true scale (0.5m to 1e15 km) using a floating-origin world engine, logarithmic depth buffer, and Keplerian orbital mechanics. Users can seamlessly fly through space, walk on planetary surfaces (including real DEM terrain for Earth, Moon, Mars), dive into Earth's oceans, or orbit from a Google Earth-style camera. The application includes a bilingual (Chinese/English) interface with 7-language i18n, search, guided tours, educational facts with NASA sources, mobile touch controls, and shareable URLs. All ephemeris data—planets, 21 moons, 28 TNOs, 4 comets, and ~5400 small bodies—is generated offline via scripts that fetch from NASA JPL and fitted to Horizons state vectors. The architecture is a client-only SPA with modular ES modules; no backend, no registration, no cookies. The codebase demonstrates high craftsmanship in its floating-origin precision, pure-function ephemeris, procedural terrain generation, and real-time atmosphere scattering, though it carries technical debt from a monolithic main.js and incomplete i18n for half its languages.