A Step-by-step
Example Using DIAL To Digitally Process a MISR Sample Data File To Produce a Viewable
Image
Access DIAL
(using a browser or using a link on this CD).
(optional)
Select the "view" option for the MISR AN or CF data file (ONLY
if access is via a directory)(a direct link bypasses this step).
At the bottom of the
"Scientific Data Browser -- HDF-EOS Data File" page, click on the spectral
band of the grid data that you want to view. AN data are all 275-m resolution
(spatial sampling), and big. CF data are 275-m resolution for the red band
and 1-km resolution for the others. Selection of a 275-m band means that the
image is larger but that one has to wait a few seconds after a submit before
results are shown.
On the "grid
information" page, accept the defaults for Image and Map.
On the same
page, set the (n-1)(Start) SOMBlockDim = 53 and the (n+2)(Stop)
= 56. These values are the limits of the subset, not of a full
granule, but could be used to find this location in the full granule.
At the bottom of the
same page, select Histogram equalization.
On the same page, select
Palette, to produce a false-color image from the digital data:
The Palette option Rainbow256 is a good general color lookup table.
CCAP80 makes obvious the cloud and haze structure, but not the
land features.
For the red band of the CF file, use OCTS256
to show the smoke and haze.
For the red band, GVI256 and
GVI175 show the details of the Snake River Plain but not the mountains.
On the same
page, [Submit]. (You may have to wait a few seconds for results.)
On the next
page, the buttons allow navigation within the blocks selected.
To see a different spectral band, start over at #3.
To see the results of using a different palette, start over at #7.
