astrodynamics-gnss 0.9.2

GNSS domain layer (SP3, broadcast ephemeris, multi-GNSS single-point positioning, ionosphere/troposphere, DOP) built on the astrodynamics core
Documentation 
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//! SPP solver policy constants.

const PI: f64 = std::f64::consts::PI;

/// Transmit-time iteration count (fixed, no inner convergence test).
pub const TRANSMIT_TIME_ITERATIONS: usize = 2;

/// Elevation mask in radians (10 degrees); a satellite is excluded iff its
/// elevation is strictly below this value.
pub const ELEVATION_MASK_RAD: f64 = 10.0 * PI / 180.0;

/// Base measurement standard deviation (m) for the elevation weight model.
pub const SIGMA0_M: f64 = 1.0;