nav.nav_technique

class NavTechnique(nav_master: NavMaster, *, config: Config | None = None)

Bases: ABC, NavBase

Base class for navigation techniques.

property confidence: float | None

Returns the confidence in the computed offset as a float or None if not calculated.

property metadata: dict[str, Any]

Returns the metadata dictionary.

property nav_master: NavMaster

Returns the navigation master instance.

abstractmethod navigate() → None

Performs the navigation process.

This abstract method must be implemented by all navigation technique subclasses.

property offset: tuple[float, float] | None

Returns the computed offset as a tuple of (v, u) or None if not calculated.

The floating point offset is of form (dv, du). If an object is predicted by the SPICE kernels to be at location (v, u) in the image, then the actual location of the object is (v+dv, u+du). This means a positive offset is equivalent to shifting a model up and to the right (positive v and u).

property uncertainty: tuple[float, float] | None

Returns the computed uncertainty as a tuple of (v, u) or None if not calculated.

class NavTechniqueManual(nav_master: NavMaster, *, config: Config | None = None)

Bases: NavTechnique

Manual navigation technique using an interactive PyQt6 dialog.

Builds the same combined model as NavTechniqueCorrelateAll, but lets the user manually specify the (dv, du) offset using a GUI with pan/zoom. The dialog also supports an Auto button that calls the same KPeaks correlation used by the correlate_all technique.

combined_model() → NavModelCombined | None

Returns the combined model created for this technique.

navigate() → None

Run the manual navigation dialog and return the chosen offset.

class NavTechniqueCorrelateAll(nav_master: NavMaster, *, config: Config | None = None)

Bases: NavTechnique

Implements navigation technique using correlation across all available models.

combined_model() → NavModelCombined | None

Returns the final combined model.

navigate() → None

Performs navigation using correlation across all available models.

Attempts to find correlation between observed image and combined model, computing the offset if successful.

class NavTechniqueTitan(nav_master: NavMaster, *, config: Config | None = None)

Bases: NavTechnique

Implements navigation technique specific to Titan observations.

navigate() → None

Performs navigation specific to Titan observations.

Currently a placeholder implementation.