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Re: How to read ASTER in ENVI? [message #55543 is a reply to message #55542]

Mon, 27 August 2007 07:25

Jeff N.
Messages: 120
Registered: April 2005

Senior Member

On Aug 27, 3:21 am, highstone <gaolei...@gmail.com> wrote:
> hello, I have a secen ASTER data named as "pg-
> PR1B0000-2003102104_030_001"，which not have suffix ".hdf ", and no
> other files that have the same filename with suffix such as ".met",
> and so on. When I read it by ENVI from "file----open image file" or
> "file ----open external file---eos---aster", all the bands can be
> showed in "available bands", and the DN of VIR band is float type and
> more than 1, which shows it is not reflectance. I want to know how to
> get the reflectance for visible or infrared bands and the radiance for
> Tir of such ASTER data in ENVI or ERDAS? please help me, thank you.

Just as an FYI: just b/c your data have values greater than 1 does
not necessarily mean you don't have reflectance data. FLAASH, for
example, commonly outputs "scaled reflectance" data, which is
reflectance x some scale factor (you choose it, but 10,000 is
common). But I think Mort's right about your data being radiance data
in this case.

Jeff

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[Message index]

		Re: How to read ASTER in ENVI? By: James Kuyper on Mon, 27 August 2007 07:51
		Re: How to read ASTER in ENVI? By: Jeff N. on Mon, 27 August 2007 07:25
		Re: How to read ASTER in ENVI? By: Mort Canty on Mon, 27 August 2007 04:37

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