Modules
Satellite toolkit for Elixir. SGP4 orbit propagation, coordinate transformations, and ground station pass prediction.
Angular geometry calculations for satellites.
Atmospheric density via the NRLMSISE-00 empirical model.
Ground-observer Sun and Moon geometry.
Parse and encode CCSDS Conjunction Data Messages (CDM).
Object-specific data block inside a parsed CCSDS CDM.
Parse and encode CCSDS Orbit Ephemeris Messages (OEM).
One 6x6 covariance block inside a parsed CCSDS OEM segment.
Metadata block for one CCSDS OEM segment.
One metadata/data segment of a CCSDS OEM.
One Cartesian state sample inside a parsed CCSDS OEM segment.
Parse and encode CCSDS Orbit Parameter Messages (OPM).
Optional OPM 6x6 covariance. matrix is a row-major list of six six-element
rows.
Optional OPM Keplerian elements.
One OPM maneuver block. dv_km_s is the {x, y, z} delta-v in the maneuver
reference frame.
OPM metadata block.
Optional OPM spacecraft parameters. Every field is optional.
OPM Cartesian state vector.
Collision probability calculation for close approaches.
Result of a collision-probability evaluation.
Time-of-closest-approach and conjunction screening helpers.
Manage and propagate satellite constellations.
Coordinate frame transformations for satellite state vectors.
Covariance matrix helpers for conjunction and orbit analysis.
Batch single-epoch coverage helpers backed by the Rust core.
Doppler shift calculation for satellite-ground links.
Earth shadow (eclipse) prediction for satellites.
Canonical representation of satellite orbital elements.
Encounter geometry helpers for conjunction assessment.
Relative encounter geometry at a common epoch.
JPL/NAIF SPK (DAF .bsp) ephemeris kernel reader.
Earth's oblateness (J2) perturbation force model.
Standard Keplerian Two-Body gravity force model.
Parse and encode CCSDS Orbit Mean-Elements Messages (OMM).
UTC calendar epoch carried by an OMM EPOCH field.
Parse and encode Two-Line Element sets.
Parser and lookup helpers for ANTEX 1.4 receiver and satellite antenna blocks.
A parsed RINEX broadcast-navigation product (GPS LNAV, Galileo I/NAV+F/NAV, BeiDou D1/D2, GLONASS).
Broadcast satellite-clock polynomial.
One GLONASS broadcast state-vector record.
Broadcast ionosphere coefficients parsed from a RINEX NAV header.
Broadcast Keplerian orbital elements.
Klobuchar alpha and beta ionosphere coefficients.
One GPS, Galileo, or BeiDou broadcast ephemeris record from RINEX NAV.
A broadcast-evaluated satellite state at one epoch.
Broadcast-ephemeris accuracy: compare a broadcast navigation product against a precise SP3 product over a window.
The result of a broadcast and precise product comparison.
Orbit and clock difference statistics for one satellite (or the overall set).
Dual-frequency carrier-phase linear combinations and the precise-positioning prep tooling built on them: geometry-free and wide-lane phase, the narrow-lane code, Melbourne-Wubbena, cycle-slip detection, and Hatch carrier-smoothed code.
GNSS constellation identity catalogs and validation helpers.
The result of a lenient catalog build: the records that resolved, plus the OMM entries that did not.
Change report between two GNSS constellation catalog snapshots.
A parsed row from NAVCEN's GPS constellation status table.
A normalized GNSS satellite identity record.
An OMM entry that Sidereon.GNSS.Constellation.from_celestrak_omm_lenient/2
could not resolve to a Record for the requested system.
Validation report for a GNSS constellation catalog.
Code-differential GNSS (DGPS) positioning over single-frequency pseudoranges.
A unified satellite-ephemeris sampling surface over precise SP3 products and broadcast navigation messages.
One sampled satellite state at one epoch in the unified ephemeris table.
Canonical GNSS carrier-frequency lookups.
Satellite-geometry and mission-planning layer above the GNSS observables: from a static receiver position and a precise (SP3) ephemeris, answer the three planning questions: which satellites are visible, how good is the geometry (dilution of precision), and when does each satellite rise and set.
Single-frequency ionospheric group-delay corrections.
The dual-frequency ionosphere-free linear combination for code and phase.
GPS L1 C/A LNAV navigation message synthesis and decoding (subframes 1-3).
GPS LNAV clock and ephemeris parameters in engineering units.
Predict the GNSS observables a receiver at a known ECEF position would see for a satellite, from a precise (SP3) or broadcast ephemeris source.
Precomputed, state-independent PPP per-range corrections for the static-arc float/fixed solve: solid-earth tide, carrier-phase wind-up, and satellite antenna PCO/PCV.
GNSS single-point positioning (SPP): recover a receiver position, clock bias, and geometry diagnostics from one epoch of pseudorange observations against a precise SP3 ephemeris or a broadcast navigation product.
A single-point-positioning solution at one receive epoch.
A single-point-positioning solution paired with the provenance of the ephemeris that produced it.
Carrier-phase precise-positioning primitives.
Static multi-epoch integer-fixed carrier-phase solution.
Static multi-epoch float-ambiguity phase positioning solution.
Float-ambiguity phase positioning solution for one epoch.
Measurement-quality control for single-point positioning.
RINEX clock (.CLK) reader for satellite clock-bias records.
RINEX 3 observation products: parse a station's observation file, expose its
header (including the surveyed APPROX POSITION XYZ, optional antenna
DELTA H/E/N offset, and carrier phase-shift records), and extract the
single-frequency pseudoranges that Sidereon.GNSS.Positioning.solve/4 consumes.
RTCM 3.x differential-GNSS stream decoding.
RTK-facing carrier/code double-difference primitives.
Integer-fixed RTK baseline solution from code/carrier double differences.
Float RTK baseline solution from code/carrier double differences.
Moving-baseline RTK: both receivers move each epoch (RTKLIB "moving-base").
A compact, fitted mean-element approximation of a satellite's orbit.
A long position track approximated by a sequence of contiguous, independently
fitted Sidereon.GNSS.ReducedOrbit segments.
SP3-c / SP3-d precise-ephemeris products (IGS precise orbits + clocks).
An SP3 satellite state at one epoch.
GPS L1 coarse/acquisition (C/A) code generation and correlation.
Baseband simulation, correlation, and acquisition for the GPS L1 C/A signal.
Product-staleness graceful degradation for time-varying GNSS products.
A selected IONEX product paired with its staleness metadata.
Staleness cap for product selection.
A selected SP3 product paired with its staleness metadata.
Structured description of the product staleness behind a selection result.
Epoch conversions shared by the GNSS correction wrappers.
Neutral-atmosphere (tropospheric) signal-delay corrections.
Recover receiver velocity and clock drift from one epoch of range-rate or Doppler observations against a precise SP3 or broadcast ephemeris source.
WGS84 geodetic position: latitude, longitude, altitude.
Geoid undulation lookup and orthometric/ellipsoidal height conversion.
Integer least-squares search helpers.
Initial Orbit Determination methods.
Lambert problem solver (Battin's method).
Generic data-driven trust-region least squares.
A leave-one-out sweep: the base solve over all rows, one drops solve per
masked residual row (in row order), and cost_delta giving how much the
optimum cost moves when each row is removed.
A single converged trust-region solve.
Topocentric look angle from a ground station to a satellite.
Observational-astronomy geometry primitives.
Classical (Keplerian) orbital elements and the two-body state transforms.
A satellite pass over a ground station.
Satellite pass prediction over a ground station.
High-precision numerical orbit propagation.
RF link budget primitives.
SGP4/SDP4 orbit propagation from Two-Line Element sets.
Residual-distribution diagnostics: sample moments and normality tests.
Represents the position and velocity of a satellite in the TEME coordinate system.