satdump::projection::SatelliteRaytracer Class Reference

Generic base class for satellite raytracers. More...

#include <satellite_raytracer.h>

Inheritance diagram for satdump::projection::SatelliteRaytracer:

Public Member Functions
	SatelliteRaytracer (nlohmann::ordered_json cfg)
virtual bool	get_position (double x, double y, geodetic::geodetic_coords_t &pos, double *otime=nullptr)=0
	Get geodetic position of a pixel (can be fractional)

Protected Attributes
const nlohmann::ordered_json	d_cfg

Detailed Description

Generic base class for satellite raytracers.

The general idea is that in most cases in order to geo-reference satellite imagery it is necessary to calculate where the instrument was looking from the attitude & position of the satellite, and raytrace this to Earth. In this instance, it is meant to convert pixel positions in an image to lat/lon.

IMPORTANT : The pixel values here MUST already have been ran through a ChannelTransform if required for the channel you're working with!

Of course there are many different methods to do this considering how variable the instruments and scanning patterns are, therefore many variants are required.

Parameters

d_cfg

internal copy of the JSON configuration

Member Function Documentation

get_position()

virtual bool satdump::projection::SatelliteRaytracer::get_position ( double x, double y, geodetic::geodetic_coords_t & pos, double * otime = nullptr )

pure virtual

Get geodetic position of a pixel (can be fractional)

Parameters

x	pixel position
y	pixel position
pos	output geodetic position
otime	optionally, timestamp of the position

Returns

true on error

Implemented in satdump::projection::ManualLineRaytracerOld, satdump::projection::NormalLineRaytracer, satdump::projection::NormalLineRaytracerOld, satdump::projection::NormalPerIFOVRaytracerOld, and satdump::projection::TimestampLineGCPsRaytracer.

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The documentation for this class was generated from the following file:

• src-core/projection/raytrace/satellite_raytracer.h