Chapter 9 — Further Reading

Orbit selection sits at the meeting point of orbital mechanics and mission design, so the best follow-ups range from astrodynamics textbooks to the systems-engineering literature and a few primary sources. Tier-1 works are canonical and reliable; Tier-2 items are trustworthy but secondary or introductory.

Textbooks (the rigorous backbone)

• Curtis, Orbital Mechanics for Engineering Students (Tier 1). The friendliest rigorous treatment of everything in this chapter. Its chapters on orbital elements and orbit types give the derivations we borrowed, with worked examples in the same spirit as ours.
• Vallado, Fundamentals of Astrodynamics and Applications (Tier 1). The professional's reference. Its tables of orbit types, the exact sun-synchronous and Molniya (critical-inclination) conditions, and coverage geometry are the definitive versions of what we sketched. Reach for it when you need the real formula, not the intuition.
• Wertz, Everett & Puschell (eds.), Space Mission Engineering: The New SMAD (Tier 1). The mission-design bible. Its chapter on orbit selection is essentially this chapter written for practicing engineers — trade tables, coverage figures, and constellation sizing. If you liked §9.6, this is where it goes next.
• Bate, Mueller & White, Fundamentals of Astrodynamics (Tier 1). The classic, inexpensive, and still excellent introduction; strong on the two-body foundations underneath every orbit here.

Free and online

• Braeunig, Rocket & Space Technology (rocket propulsion and orbital mechanics pages) (Tier 2). A clear, free web reference with the circular-velocity, period, and vis-viva relations and worked orbit examples — handy for checking your arithmetic.
• NASA, Basics of Space Flight (JPL) (Tier 1). A free, well-written primer whose orbit-types section is a gentle companion to §§9.1–9.5, with real mission examples.
• GPS.gov — "Space Segment" (U.S. government) (Tier 1). The authoritative description of the GPS constellation: 24-slot baseline, six planes, $55^\circ$, semi-synchronous period. The primary source behind Case Study 1.

Videos

• Scott Manley, orbital-mechanics and satellite-orbit explainers (YouTube) (Tier 2). Manley's intuitive, KSP-illustrated videos on GEO, sun-synchronous, and Molniya orbits pair well with this chapter; watch after reading to cement the pictures.

Primary and historical

• Arthur C. Clarke, "Extra-Terrestrial Relays," Wireless World (1945) (Tier 2). The four-page article that proposed the geostationary relay decades before it existed. Short, readable, and historically remarkable — the source of §9.3's history callout. (Wording of the epigraph is widely reproduced; verify against the original if quoting formally.)
• NASA technical summaries of the TIROS / NOAA polar-orbiting and GOES geostationary weather satellites (Tier 2). Concrete illustrations of the sun-synchronous-versus-geostationary split in a single agency's fleet — the two orbits doing two different jobs.

Tools (learn by doing)

• GMAT (General Mission Analysis Tool), NASA (Tier 1). Free, professional-grade mission-analysis software. Build a GEO, a sun-synchronous, or a Molniya orbit and watch its ground track — the fastest way to see what this chapter describes.
• poliastro (Python) (Tier 2). An open-source astrodynamics library; define orbits by their elements and plot them. A natural next step from the orbit_catalog.py helper you wrote here.
• Kerbal Space Program (Tier 2). Still the best intuition-builder in existence for orbit types: fly your own comsat to keostationary orbit, or a scanning satellite to a polar orbit, and feel the trades.

Suggested order

1. Start with NASA Basics of Space Flight (orbit types) or a Scott Manley video for the pictures.
2. Read Curtis (orbit types and elements) for the rigorous version of this chapter.
3. Skim The New SMAD (orbit selection) to see §9.6 as professionals practice it.
4. Read the Clarke 1945 paper for the origin story, then open GMAT and build the three orbits of your Mission Design Track to make it all concrete.