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Composite Images

       Can I automatically build combined  images  from  multiple
       satellite passes?
       Yes,  if you have purchased the upgrade.  Here's how to do
       it:

       First, open the Recording Options dialog from the  Options
       menu.   Select Record only when selected active APT satel­
       lites are overhead.  Select OK.

       Select Linear (constant) from the Contrast sub-menu in the
       Options  menu.  This helps to ensure that each part of the
       composite image will have similar brightness and contrast.

       Select Full from the Illumination Compensation sub-menu in
       the Options menu.  This also helps  to  ensure  that  each
       part  of  the composite image will have similar brightness
       and contrast.

       If you wish to create  composite  images  using  the  HVC,
       HVCT,  or  Anaglyph  enhancements you might want to select
       the Use other sensor in the Options menu.

       Open the Record dialog from the File  menu.   Ensure  that
       Record  and  decode  is selected.  Ensure Create composite
       image(s) is selected.  Then click on the  Composite  Image
       Settings button.

       Set  the  Composite Image Filename Template to %g-%e.  But
       this can vary depending  on  what  you  wish  to  achieve.
       Other  choices  might  include  %s-%e, %g-%k-%e, %s-%k-%e,
       %g-%k-%p-%e, or %s-%k-%p-%e.   See  Filename  Template  in
       Graphic User Interface under the Help menu.

       Select the enhancements you would like to create composite
       images for.

       Change the Projection to Mercator (or  any  other  projec­
       tion)  You  can  change the Centre Longitude if desired to
       some longitude near you, or leave it blank.  Now  set  the
       North,  South, West and East boundaries.  Try setting them
       to about 30 degrees north and south, and  about  30  -  40
       degrees west and east of your location.  Latitude and lon­
       gitude must be entered as a decimal number in degrees  and
       fractions  of degrees.  Use positive numbers for north and
       east, negative numbers for south and west.  You must enter
       a value for all four bounds.  Select Set.

       Note  that  the  Minimum percent of projection filled does
       not apply to composite images.

       Now click on the Record  button.  Each  time  a  satellite
       passes  the  images  will  be  overlaid  on  the composite
       images.  You can view the composite images that have  been
       produced by selecting View Image from the File menu.

       Can I build composite images manually?
       Yes, if you have purchased the upgrade.

       Select Linear (constant) from the Contrast sub-menu in the
       Options menu.  This helps to ensure that part of the  com­
       posite image will have similar brightness and contrast.

       Select Full from the Illumination Compensation sub-menu in
       the Options menu.  This also helps  to  ensure  that  each
       part  of  the composite image will have similar brightness
       and contrast.

       Open the Projection Options dialog from the Options  menu.
       You  can  change  the  Centre Longitude if desired to some
       longitude near you, or leave it blank.  Now set the North,
       South,  West  and  East  boundaries.   Try setting them to
       about 30 degrees north  and  south,  and  about  30  -  40
       degrees west and east of your location.  Latitude and lon­
       gitude must be entered as a decimal number in degrees  and
       fractions  of degrees.  Use positive numbers for north and
       east, negative numbers for south and west.  You must enter
       a value for all four bounds.  Select Set.

       Under the Projection menu, select Mercator (or any projec­
       tion other than Normal).

       Under the Enhancements menu, select then  enhancement  you
       want to use for the composite image.

       Now  open  a  recording using Open Audio File, a raw image
       using Open Raw Image, or a processed image (from  WXtoImg)
       using  View Image from the File menu.  Opening audio files
       or raw images will generally  result  in  better  results.
       When  processing  is  complete,  select Composite Image to
       from the File menu.  Better results  can  be  achieved  by
       saving  to PNG or BMP files (set the filename extension to
       .png or .bmp (e.g. noaa-2401.png).

       Repeat the previous step for other recordings, raw images,
       and  movies,  saving  them  to  the  same  filename.  When
       prompted to overwrite the  file,  select  yes.   Composite
       images  are not overwritten, instead the new image will be
       overlaid over the previous one.

       Better results may be achieved by saving the lower  eleva­
       tion  passes  first  and  the highest elevation pass last.
       This ensures that the best images occupy as  much  of  the
       composite image as possible.

       When you have added all the images, select View Image from
       the File menu and select the file you just created.