Crate spacelab 

Space data computation, assembled.

The other crates know nothing of one another beyond what they must. This one joins them, and its whole job is the single function that was missing: turning a UTC label and a table of Earth-orientation measurements into the transform that carries a satellite’s state onto the ground.

Until it existed, teme_to_itrf took xp, yp and a UT1 epoch that nothing supplied, and the example propagated the ISS with xp = yp = 0 and UT1 = UTC. That is worth up to 0.9 seconds of Earth rotation — four hundred metres at the equator — and a comment saying “real work loads EOP” is not real work.

let series = EopSeries::parse_finals2000a(&std::fs::read_to_string("finals2000A.all")?)?;
let utc = UtcDateTime::new(2026, 7, 10, 12, 0, 0.0)?;

let (transform, quality) = teme_to_itrf_at(utc, EopSource::Series(&series))?;

Re-exports

pub use spacelab_core as core_types;

pub use spacelab_earth as earth;

pub use spacelab_eop as eop;

pub use spacelab_fa as fa;

pub use spacelab_frames as frames;

pub use spacelab_sgp4 as sgp4;

Structs

EarthOrientation

Everything the frame chain needs at one instant, drawn from measurement.

Enums

EarthOrientationError

Why the Earth’s orientation at an instant could not be established.

EarthOrientationQuality

Where the orientation in an EarthOrientation came from.

EopSource

Where earth_orientation_at should get the Earth’s orientation.

Functions

earth_orientation_at

Establish the Earth’s orientation at a UTC instant, from the source the caller names.

teme_to_itrf_at

The TEME-to-ITRF transform at a UTC instant, built from the Earth orientation source names.

tt_minus_tai_ns

TT − TAI, in nanoseconds. Exposed so a caller can check the chain by hand.