config

type CombinationConfig struct {
	IonosphereFree   bool // ionosphere-free combination
	NarrowLane       bool // narrow-lane combination
	WideLane         bool // wide-lane combination
	GeometryFree     bool // geometry-free combination
	MelbourneWubbena bool // Melbourne-Wübbena combination
}

type CorrectionConfig struct {
	Troposphere  bool // tropospheric delay
	Ionosphere   bool // ionospheric delay (if single-freq or testing)
	Sagnac       bool // Sagnac effect
	PhaseWindup  bool // carrier phase windup
	Relativity   bool // relativistic effects
	TidalLoading bool // solid earth tide
	OceanLoading bool // ocean loading
	PCV          bool // phase center variation
	PCO          bool // phase center offset
}

type ModelConfig struct {
	// Troposphere model: "niell", "sasstamoinen", "stanag"
	Troposphere string

	// Ionosphere model: "klobuchar", "nequickg", "bdgim", "dual-freq"
	Ionosphere string

	// Satellite position: "broadcast", "precise" (SP3)
	SatellitePosition string

	// Clock: "broadcast", "precise" (SP3 or CLK)
	Clock string
}

type PPPARConfig struct {
	ProcessingConfig // Embed base processing configuration

	// Precise product settings
	SP3FilePath   string // Path to SP3 precise orbit file
	CLKFilePath   string // Path to clock (CLK) file
	BiasSINEXPath string // Path to Bias-SINEX file (CODE or IGS)
	VMFGridPath   string // Path to VMF troposphere grid files
	AntexFilePath string // Path to ANTEX antenna calibration file

	// Processing mode
	ProcessingMode string // "static" or "kinematic"

	// Ambiguity resolution settings
	AREnabled          bool    // Enable ambiguity resolution
	ARMinRatio         float64 // Ratio test threshold (default: 3.0)
	ARMinSatellites    int     // Minimum satellites required for AR (default: 5)
	ARValidationMethod string  // "ratio", "w-test", or "combined"

	// Troposphere estimation
	EstimateTroposphere bool   // Enable troposphere estimation
	TroposphereModel    string // "VMF1", "VMF3", or "Saastamoinen"
	EstimateGradients   bool   // Estimate troposphere gradients (North/East)

	// Process noise parameters (for Kalman filter)
	ProcessNoisePosition    float64 // m²/s - for kinematic mode
	ProcessNoiseClock       float64 // m²/s - receiver clock random walk
	ProcessNoiseTroposphere float64 // m²/s - troposphere ZWD random walk
	ProcessNoiseAmbiguity   float64 // cycles²/s - float ambiguity process noise (typically 0)

	// Measurement weighting
	CodeSigma  float64 // Code measurement std dev (meters), default: 1.0
	PhaseSigma float64 // Phase measurement std dev (meters), default: 0.01
}

type PPPARPipelineBuilder struct {
	// contains filtered or unexported fields
}

type PipelineBuilder struct {
	// contains filtered or unexported fields
}

type ProcessingConfig struct {
	// Receiver position in ECEF coordinates (meters)
	ReceiverPosition coordinates.Vector3D

	// Systems to process (e.g., GPS, GALILEO, GLONASS)
	Systems []gnss.System

	// Elevation masks per system (degrees)
	ElevationMasks map[gnss.System]float64

	// Model selections
	Models ModelConfig

	// Correction toggles
	Corrections CorrectionConfig

	// Linear combination toggles
	Combinations CombinationConfig

	// Signal type priority configuration for signal selection
	SignalTypePriorities SignalTypePriorityConfig

	// Processing mode
	Mode ProcessingMode
}

type ProcessingMode string

type SignalTypePriorityConfig struct {
	// Default signal type priorities (applied when constellation-specific not found)
	// Lower number = higher priority
	DefaultPriorities map[observation.SignalType]int

	// Constellation-specific signal type priorities (per GNSS system)
	// Key: gnss.System (GPS, GALILEO, GLONASS, etc.), Value: SignalType -> priority mapping
	ConstellationPriorities map[gnss.System]map[observation.SignalType]int
}