smeta_geometry.h

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/*
 *  Name:   smeta_geometry.c
 *
 *  Purpose:
 *  Source file containing the functions used to relate Level 1T pixel line/sample
 *  coordinates to the corresponding viewing and solar illumination angles. These functions
 *  operate on the SMETA data type defined in "smeta.h".
 */
#ifndef _SMETA_GEOMETRY_H_
#define _SMETA_GEOMETRY_H_
 
#include "ias_math.h"               /* IAS_VECTOR declaration                    */
#include "smeta.h"              /* Definition of SMETA structure             */
 
int smeta_geodetic_to_ecef(
    double  lat,                /* Input latitude in radians                 */
    double  lon,                /* Input longitude in radians                */
    double  hgt,                /* Input height in meters                    */
    IAS_VECTOR  *ecef );            /* Output ECEF vector                        */
 
int smeta_geodetic_to_ecf2lsr(
    double  lat,                /* Input latitude in radians                 */
    double  lon,                /* Input longitude in radians                */
    double  ecf2lsr[3][3] );        /* ECEF to LSR rotation matrix               */
 
int smeta_proj_to_l1t(
    SMETA   *smeta,             /* Input enhanced metadata info              */
    int     band,               /* Input band number                         */
    double  proj_x,             /* Input projection X coordinate             */
    double  proj_y,             /* Input projection Y coordinate             */
    double  *l1t_line,          /* Output L1T line number                    */
    double  *l1t_samp );            /* Output L1T sample number                  */
 
int smeta_geodetic_to_proj(
    SMETA_SCENE_PROJ    proj,           /* Input enhanced metadata projection info   */
    double  lat,                /* Input latitude (radians)                  */
    double  lon,                /* Input longitude (radians)                 */
    double  *proj_x,            /* Output projection X coordinate            */
    double  *proj_y );          /* Output projection Y coordinate            */
 
int smeta_init_projection(
    SMETA_SCENE_PROJ    proj );         /* Input enhanced metadata projection info   */
 
int smeta_transform_projection(
    double      inx,            /* I: Input X projection coordinate            */
    double      iny,            /* I: Input Y projection coordinate            */
    double      *outx,          /* O: Output X projection coordinate           */
    double      *outy );        /* O: Output Y projection coordinate           */
 
void smeta_release_projection();
 
int smeta_band_number_to_index(
    SMETA       *smeta,         /* Input enhanced metadata info                */
    int         band );         /* Input band number                           */
 
int smeta_calc_vectors(
    SMETA       *smeta,         /* Enhanced metadata                           */
    int         band,           /* Current band number                         */
    double      l1t_line,       /* Current L1T line number                     */
    double      l1t_samp,       /* Current L1T sample number                   */
    IAS_VECTOR      *satvec,        /* Satellite view vector                       */
    IAS_VECTOR      *sunvec );      /* Solar illumination vector                   */
 
#endif