scc_measure 3

Description

Technical info

Name        : SCC_MEASURE3

Purpose     : Measure 3D coordinates from three images

Explanation : Widget application to allow a user to select with the cursor a

              feature appearing in three images.  The selected coordinates are

              used to locate the point in three-dimensional space.

              The user first selects a point on one image.  The program then

              displays a line on the other two images representing the

              line-of-sight from the first image.  The user then selects the

              point along this line with the same feature, in any of the other images.

              The 3D coordinates are then calculated and displayed within the widget

              as (Earth-based) Stonyhurst heliographic longitude and

              latitude, along with radial distance in solar radii.

              In essence, this is a demonstration procedure showing how to

              derive 3D information from multi-viewpoint data.

Tested with:  EUVI A & B, EIT, AIA and EUI

Syntax      : SCC_MEASURE3, IMAGE_AHEAD, IMAGE_BEHIND, IMAGE_OTHER, INDEX_AHEAD, INDEX_BEHIND, INDEX_OTHER

 Inputs  : IMAGE_AHEAD  = Image for the Ahead observatory

               IMAGE_BEHIND = Image for the Behind observatory

               IMAGE_OTHER  = Image for the Other observatory

               INDEX_AHEAD  = FITS index structure for Ahead

               INDEX_BEHIND = FITS index structure for Behind

               INDEX_OTHER  = FITS index structure for Other

Calls       : SCCREADFITS, FITSHEAD2WCS, EXPTV, SCC_MEASURE3_EVENT,

                 SCC_MEASURE3_SELECT_1ST, SCC_MEASURE3_SELECT_2ND,   BOOST_ARRAY,

               SCC_MEASURE3_REDISPLAY, SSC_MEASURE3_REPLOT, SSC_MEASURE3_CLEANUP,

              SETWINDOW, GET_TV_SCALE, WCS_GET_COORD, CONVERT_SUNSPICE_COORD

Common      : SCC_MEASURE3 = Internal common block used by the widget program.

Restrictions: None.

Side effects: None.

Adapted from SCC_MEASURE (William Thompson)