COMBINE Command in McIDAS-V

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Greg
Posts: 29
Joined: Thu Jan 15, 2009 11:52 am

COMBINE Command in McIDAS-V

Post by Greg »

Good Afternoon:
>>
>> Is there a way to combine satellite, vis, vis, ir, as in the McIDAS COMBINE command in McIDAS-V?
>>
>> Thanks ..
>>
>> Greg ..
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Rick
Posts: 404
Joined: Fri Jan 16, 2009 8:20 pm

Re: COMBINE Command in McIDAS-V

Post by Rick »

Using the data explorer window ...
1) From data sources add a visible image
2) From data sources add an IR image
3) From the field selector select formulas
4) Open the imagery option
5) Select 3 color image
6) Select create display
7) You should see a new window with 3 options. Choose vis for the first, vis for the second and ir for the third.
8) Hit okay - might have to wait a bit, but your image should show up.
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wstraka
Posts: 66
Joined: Thu Jun 18, 2009 5:05 pm

Re: COMBINE Command in McIDAS-V

Post by wstraka »

Rick,

How do you do the reverse of the IR channel??
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Rick
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Joined: Fri Jan 16, 2009 8:20 pm

Re: COMBINE Command in McIDAS-V

Post by Rick »

Do you mean invert the brightness levels (i.e., black to white becomes white to black?)
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wstraka
Posts: 66
Joined: Thu Jun 18, 2009 5:05 pm

Re: COMBINE Command in McIDAS-V

Post by wstraka »

Rick,

Yeah. Typically, the RGB's we do from SEVIRI and AVHRR are the VIS, 3.9 and reverse 11 micron BT for the RGB, respectively.
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mug_admin
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Joined: Thu Dec 18, 2008 9:31 pm

Re: COMBINE Command in McIDAS-V

Post by mug_admin »

Hi William,

Try the following:

1) Create a formula (from the tools menu)
I called my formula 'flip'
formula should be:
abs(x-255)

2) Load the 3 bands
3) Choose formulas
4) Choose imagery
5) Choose Three Color RGB
6) You'll get a pop-up window. For Red - choose .65 channel, for Green choose 3.9. for blue, choose formula, imagery,flip
7) You'll get another pop-up, choose 10.5 channel
8) Create Display.

I compared my results with McX and they matched.
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