installing 6S/Py6S (to subsequently use ARCSI)

[Theo Awo]

Hi All, 

I was trying to install 6S in ubuntu (following instructions from http://py6s.readthedocs.io/en/latest/installation.html). Now I'm having trouble using 'ln sixsV1.1 /usr/local/bin/sixs' to 'Link 6S to a location on my PATH' .This is needed to place the 'executable, sixsV1.1, somewhere where Py6S can find it'

I'm getting this error:

ci@ubuntu:~/canopy/6SV-1.1/6SV1.1$ ln sixsV1.1 /usr/local/bin/sixs

ln: failed to create hard link '/usr/local/bin/sixs': Read-only file system

As a newbie, I'm not sure if this is just a mistake on my part or it isn't possible. Help on exploring the other two alternative to achieve my aim of will be appreciated too.

Theo.

[Daniel Clewley]

Hi Theo,

Normal users don’t have permission to write to /usr/local, you will need to run with root privileges using sudo, for example:

sudo ln $PWD/sixsV1.1 /usr/local/bin/sixs

I’m assuming you have sudo on your machine if not you can just add where ever it is to PATH.

For ARCSI and all the dependencies (including 6S) we normally advise installing through conda as we make binaries available, see https://spectraldifferences.wordpress.com/software/

We haven’t made a new environment for the latest release yet so for now you will need to use the development build for now:

conda create --name arcsidev python=3.5
source activate arcsidev
conda install -c conda-forge -c au-eoed arcsi

Thanks,

Dan

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[Theo Awo]

Hi Peter,

Thanks so much. It worked!

On Tue, Jan 17, 2017 at 1:27 PM, Daniel Clewley <daniel....@gmail.com> wrote:

Hi Theo,

Normal users don’t have permission to write to /usr/local, you will need to run with root privileges using sudo, for example:

sudo ln $PWD/sixsV1.1 /usr/local/bin/sixs

I’m assuming you have sudo on your machine if not you can just add where ever it is to PATH.

For ARCSI and all the dependencies (including 6S) we normally advise installing through conda as we make binaries available, see https://spectraldifferences.wordpress.com/software/

We haven’t made a new environment for the latest release yet so for now you will need to use the development build for now:

conda create --name arcsidev python=3.5
source activate arcsidev
conda install -c conda-forge -c au-eoed arcsi

Thanks,

Dan

On 18 Jan 2017, at 01:46, Theo Awo <philu...@gmail.com> wrote:

Hi All, 

I was trying to install 6S in ubuntu (following instructions from http://py6s.readthedocs.io/en/latest/installation.html). Now I'm having trouble using 'ln sixsV1.1 /usr/local/bin/sixs' to 'Link 6S to a location on my PATH' .This is needed to place the 'executable, sixsV1.1, somewhere where Py6S can find it'

I'm getting this error:

ci@ubuntu:~/canopy/6SV-1.1/6SV1.1$ ln sixsV1.1 /usr/local/bin/sixs

ln: failed to create hard link '/usr/local/bin/sixs': Read-only file system

As a newbie, I'm not sure if this is just a mistake on my part or it isn't possible. Help on exploring the other two alternative to achieve my aim of will be appreciated too.

Theo.

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[Theo Awo]

Hi All,

Is there any way to implement deglinting in ARCSI (after atmospheric correction). My understanding is ARCSI doesn't correct for specular reflection. If no sun glint correction in ARCSI, any idea?

Thanks.

On Tue, Jan 17, 2017 at 1:27 PM, Daniel Clewley <daniel....@gmail.com> wrote:

Hi Theo,

Normal users don’t have permission to write to /usr/local, you will need to run with root privileges using sudo, for example:

sudo ln $PWD/sixsV1.1 /usr/local/bin/sixs

I’m assuming you have sudo on your machine if not you can just add where ever it is to PATH.

For ARCSI and all the dependencies (including 6S) we normally advise installing through conda as we make binaries available, see https://spectraldifferences.wordpress.com/software/

We haven’t made a new environment for the latest release yet so for now you will need to use the development build for now:

conda create --name arcsidev python=3.5
source activate arcsidev
conda install -c conda-forge -c au-eoed arcsi

Thanks,

Dan

On 18 Jan 2017, at 01:46, Theo Awo <philu...@gmail.com> wrote:

Hi All, 

I was trying to install 6S in ubuntu (following instructions from http://py6s.readthedocs.io/en/latest/installation.html). Now I'm having trouble using 'ln sixsV1.1 /usr/local/bin/sixs' to 'Link 6S to a location on my PATH' .This is needed to place the 'executable, sixsV1.1, somewhere where Py6S can find it'

I'm getting this error:

ci@ubuntu:~/canopy/6SV-1.1/6SV1.1$ ln sixsV1.1 /usr/local/bin/sixs

ln: failed to create hard link '/usr/local/bin/sixs': Read-only file system

As a newbie, I'm not sure if this is just a mistake on my part or it isn't possible. Help on exploring the other two alternative to achieve my aim of will be appreciated too.

Theo.

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[Pete Bunting [pfb]]

Hi Theo, 

No, this is not implemented in ARCSI at the moment. It is not something I have had need to look into, is there an approach you (or anyone else) would recommend? If so can you forward a reference and I can add to it to the 'list of things to do’.

For general information, there is an issues list on the bitbucket code repository where proposed enhancements can be submitted.

Best wishes, 

Pete

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[Theo Awo]

Thanks Pete!

Hedley et al's 2005 paper sounds like a simple approach. Title is Simple and robust removal of sun glint for mapping shallow-water benthos.

[Theo Awo]

I should add that my recommendation is based on the assumption that specular reflection seems not to be a main problem for land remote sensing....