[GRASS-user] Null values from i.atcorr with Landsat 8 image

[Charlotte Whitham]

Hi markus,

Thank you very much for your reply (here and on stackexchange!).

I've taken a look at the links you provided but unfortunately don't think I'm the woman for the job as I don't really understand the instructions for adding a new sensor!

I would be extremely grateful if we do find a volunteer to help us add Landsat8, particularly as the images provided by Landsat7 in my study area are not very good quality and those from L8 are fantastic!

I'll be in touch if I find anyone fit for the job!

Many thanks for your help,

Charlie

Charlotte 夏琳 Whitham
PhD Candidate
Beijing Forestry University

Address: Mailbox no.159, College of Nature Conservation
C/O Dr. SHI Kun, Director of the Wildlife Institute, Beijing Forestry University
35, Tsinghua-East Road,
Beijing 100083
China
Website: http://wi.bjfu.edu.cn/en


On 8 Dec 2013, at 21:41, Markus Neteler <neteler at osgeo.org> wrote:

> On Fri, Dec 6, 2013 at 4:14 PM, Charlotte Whitham
> <charlotte.whitham at gmail.com> wrote:
>> Dear mailing list,
>> 
>> Apologies I am a new user with GRASS and have searched everywhere online for
>> help with this but to no avail...
> 
> You are most welcome here!
> 
>> I'm trying to run the i.atcorr module on GRASS (version 6.4.3 on a Macbook
>> Pro, Mavericks OSX) with Landsat8 imagery.
>> 
>> Parameters didn't seem to be loading from the provided metadata file
>> (MTL_txt) (basically what happened is that when the code was executed it
>> wasn't picking up any of the parameters from the text file), so I went back
>> to the GRASS manuals and tried to input values by hand, here is what I used:
>> 
>> 8 = geometrical conditions=Landsat ETM+
> 
> The problem is that Landsat8 isn't yet supported in i.atcorr, it needs
> to be added following
> http://grasswiki.osgeo.org/wiki/Atmospheric_correction#How_to_add_new_sensors_to_i.atcorr
> 
> Background: the band numbering has changed with respect to Lsat7,
> hence using the ETM+ definitions will just fail, also due to other
> differences. See for example
> http://landsat.usgs.gov/band_designations_landsat_satellites.php
> 
> Essentially we need a volunteer to add Lsat8 as a new sensor.
> 
> Markus

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