Useful Routines

• function reflection(normale,vector-in)

  Computes the direction of a light ray reflected on a mirror.

• function su2soho(outrot,inrot,xpixel,ypixel,suz)

  Computes the transformation from motor angles and pixel position into SOHO reference frame.

  The output is a 3D vector defining the line of sight.

  outrot = outer motor position in degrees
  inrot = inner motor position in degrees
  xpixel and ypixel coordinates of the pixel on detector array
  suz equals 1 for SU +Z and -1 for SU -Z.

• function su2soho25(outrot,inrot,suz)

  Same as previous. For all pixels of the 5x5 array. The routine su2soho27 computes for the 5x5 array plus the 2 outlying pixels.

• function soho2su(visee-soho)

  Conputes the transformation from SOHO coordinates to motor positions (central pixel).

• function soho2ecli(sc-posit,coord-in,inv)

  Computes the transformation from SOHO coordinates to ecliptic coordinates (J2000).

  inv = -1 makes the inverse transformation (ecliptic to SOHO).

• function ecli2equa(coord-in,inv)

  Ecliptic to Earth Equatorial coordinates (J2000). inv = -1 makes the inverse transformation.

• function equa2gala(coord-in,inv)

  Earth Equatorial coordinates to Galactic coordinates. inv = -1 makes the inverse transformation.

• function ecli2wind oy(coord-in,inv)

  Ecliptic to wind-Oy coordinates. inv = -1 makes the inverse transformation.

• function ecli2wind(coord-in,inv)

  Ecliptic to wind-Ox coordinates. inv = -1 makes the inverse transformation.

• function convert3to2rad,coordinate

  Conversion from cartesian to spherical coordinates (in radians).

• function convert3to2deg,coordinate

  Conversion from cartesian to spherical coordinates (in degrees).

• function convert2degto3,angles

  Conversion from spherical (degrees) to cartesian coordinates.

• function convert2radto3,angles

  Conversion from spherical (radians) to cartesian coordinates.

• function add(coef1,ima1,coef2,ima2)

  adds to images (coupoff format) using coefficients coef1 and coef2.

• pro plotimage,coupoff,minicol,maxicol
  (,limites=limites,slon=slon,slat=slat,vco=vco)

  2D representation of an image coupoff. Only values between minicol and maxicol are represented.

  If the array limites (lonmin,lonmax,latmin,latmax) is defined, the plot is restricted to the chosen interval. The sky projection is bosed on the map_set IDL routine.

• pro plot2image,coupof1,coupof2,minicol,maxicol
  (,limites=limites,coef=coef)

  2D representation of 2 images coupof1 and coupof2 on the same figure. Only values between minicol and maxicol are represented.

  if coef is defined, coef2 is multiplied by this factor.