WXtoImg FAQ's
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.