Module observables 

Forward GNSS observable prediction.

This module owns the language-independent geometry behind Sidereon’ Observables.predict: transmit-time iteration, Sagnac rotation, line of sight, range rate, Doppler, and topocentric azimuth/elevation. Ephemeris parsing and interpolation stay with their existing SP3/broadcast products.

Structs

ObservableState

Satellite state required by the observable predictor.

PredictOptions

Options controlling observable prediction.

PredictedObservables

Predicted GNSS observables at one receive epoch.

TransmitTimeOptions

Options controlling transmit-time satellite-state evaluation.

TransmitTimeSatelliteState

Satellite state at its signal transmit time for one receive epoch.

Enums

ObservablesError

Error returned by the observable predictor.

ObservablesInputErrorKind

Input-validation failure category for observable prediction.

Traits

ObservableEphemerisSource

An ephemeris product usable by predict.

Functions

j2000_seconds_from_split

Convert split Julian date to seconds since J2000.

predict

Predict observables for sat from a static ECEF receiver.

transmit_time_satellite_state

Evaluate a satellite’s transmit-time ECEF state for one static receiver.