Class AstrometryMapping

Inheritance Relationships

Derived Types

Class Documentation

class AstrometryMapping

virtual class needed in the abstraction of the distortion model

Subclassed by lsst::jointcal::ChipVisitAstrometryMapping, lsst::jointcal::SimpleAstrometryMapping

Public Functions

virtual std::size_t getNpar() const = 0

Number of parameters in total.

virtual void getMappingIndices(IndexVector &indices) const = 0

Sets how this set of parameters (of length Npar()) map into the “grand” fit Expects that indices has enough space reserved.

virtual void computeTransformAndDerivatives(FatPoint const &where, FatPoint &outPoint, Eigen::MatrixX2d &H) const = 0

Actually applies the AstrometryMapping and evaluates the derivatives w.r.t the fitted parameters.

This is grouped into a single call because for most models, evaluating the derivatives w.r.T parameters is not much longer than just transforming

virtual void transformPosAndErrors(FatPoint const &where, FatPoint &outPoint) const = 0

The same as above but without the parameter derivatives (used to evaluate chi^2)

virtual void offsetParams(Eigen::VectorXd const &delta) = 0

Remember the error scale and freeze it.

virtual void positionDerivative(Point const &where, Eigen::Matrix2d &derivative, double epsilon) const = 0

The derivative w.r.t. position.

virtual ~AstrometryMapping()