Appendix: Reference Books

Where to go deeper on the ideas this course leans on. None is required reading — the course is self-contained — but each is the canonical source for a mechanism we used.

Rust language & libraries

• The Rust Programming Language ("the book") — ownership, traits, error handling. The baseline this sequel assumes.
• Rust for Rustaceans (Jon Gjengset) — trait objects and object safety (why dyn Source needs async-trait), and API design for library crates like etl-core.
• Rust Atomics and Locks (Mara Bos) — the concurrency model behind the TokenBucket's Mutex and the shared-state reasoning in the executor.
• Asynchronous Programming in Rust (the async book) — futures, await, and the runtime that tokio provides.
• The serde and tokio docs — the two libraries most load-bearing here; the serde data model explains the Row tagged-enum wire format.

Domain: space situational awareness

• CelesTrak documentation (Dr. T.S. Kelso) — the authoritative reference for the TLE format, the GP element API, and orbit classification.
• Space-Track.org API docs — the CDM (conjunction data message) schema and the query language, plus the rate-limit etiquette the TokenBucket respects.
• The Launch Library 2 API (TheSpaceDevs) — the paginated launch schema.
• Revisiting Spacetrack Report #3 (Vallado et al.) — the definitive treatment of TLE mean elements and SGP4, if you take the propagation graduation step.

Data engineering & orchestration

• The Dagster and Apache Airflow docs — the systems this ETL's four seams are designed to grow toward. Read them to see what "add a scheduler" actually entails once the ledger and DAG are in place.