| 30 Jun 2011 11:16 AM |
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Hi all,
I have a question about FLAASH parameters:
In "Advanced Settings" -> "For non-nadir Looking Instruments". I have MERIS images with sensor zenith angle of 30 degrees, but the zenith angle should between 90 and 180 degrees. Does anyone know how to convert it or just use the default one?
Thanks,
Jie
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MariM
Veteran Member
Posts:2396  
| 30 Jun 2011 01:50 PM |
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FLAASH defines nadir as 180 degrees (straight down), so if your image is 30 degrees off nadir, then your zenith angle is 180-30=150.
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Deleted User
New Member
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| 30 Jun 2011 02:22 PM |
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Thank you.
But I found that MERIS should be nadir-viewing sensor, then the zenith angle should be 180 degrees. Do you think so?
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MariM
Veteran Member
Posts:2396
| 30 Jun 2011 02:25 PM |
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If it is nadir viewing then you do not need change the default values which assumes nadir.
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Deleted User
New Member
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| 30 Jun 2011 02:51 PM |
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I know. Thank you.
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