4SM tutorials

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Teach yourself 4SM in just one week -well, sort of!
Download free tutorial zipfiles,
complete with a 4SM executable code, the image, and detailed step by step tutorial

Workstation
4SM download: free tutorials
Further your training for a price
Then what?

There is a huge market for shallow water optical modeling:
just google satellite derived bathymetry

For free: you can get started on your own using my website:
- the 4SM executable code is there. All you need is a Linux X86 or AMD64 PC workstation and OpenEV, some targeted reading, and ... suitable commitment and time.
- There is even one option in 4SM for using NOAA's method (with no need, in 4SM, for atmospheric correction or field data), once the calibration has been achieved properly, if this is what you really want to test.
For free: then you can work on any of your own images, provided it is small enough:
- calibration
- deglinting-smoothing
- sea truth,
- profiling
- final modeling
- bottom typing
For a price: then you can process your own images yourself to final output on the whole image
- it is just a question for me to allow it through the license key system, imagewise
- you run 4SM on your image to get the Required_LicenseKey for tht image
- you e-mail me the Required_LicenseKey
- and I e-mail you back a CommandLine_Licensekey
  - that you will include inside the 4SM commandline script
  - in order to enable the unrestricted processing your full image.
- Whether I get paid for that Command Line_License key remains to be seen,
  - as what I want most at present is that 4SM be actually used and keeps improving:
- I would prefer that an agreement to cover this aspect be arranged as you see fit.
SUPERUSER
- then you should become a super user of 4SM, so that you'll enjoy unrestricted priviledges on your own machine

Teach yourself 4SM in just one week -well, sort of!
Download free tutorial zipfiles,
complete with a 4SM executable code, the image, and detailed step by step tutorial

4SM Workstation and work environment

Prepare your work environment

Here is how 4SM HELP works

Experience the learning curve
Sorry: I'm constantly improving, so you might experience frustration with the code.
So don't hesitate to interact with me: I'll do my best to satisfy you.

First, you'll need to familiarize with atmospheric and underwater optics.
Then, please start with the tarawa tutorial, then arcachon, then tmnov, then negril.
Then you can venture into working on your own 4 bands images, like TM, ETM, Ikonos, QuickBird, ....
Then only, you'll be ready for the big experience with hyperspectral data.

Download tutorial packages
each download contains all you need for the tutorial

Tarawa......tutorial 9 MB 2018_May_24

Each download contains

4SM executable code
4sm.calls/ ..... a directory with GMT and shp2text executables, and OpenEV color palets
data/..............a directory with the raw image data
various shapefiles
an OpenEV project file
a bash script file

Get

from here

 FWTools-linux-2.0.6.tar.gz for 32 bits Linux

FWTools download from OpenEV website
FWTools download from my Google Drive

Go to tutorial web pages

Tarawa XS

Please start with this detailed introductory SPOT 1 study case.
It demonstrates that the simplified radiative transfer equation
- in its operational form Ls=Lsw+(LsB-Lsw)/exp(2K*Z)
- does behave in a linear manner across the visible spectrum.
A nice 3-band case with a lot of skyglint , beautiful modeling using the NIR band.
Fairly clear waters in Equatorial Pacific.

Arcachon XS

Then proceed with a 1-band SPOT 1 study case:
- an estuarine sand wave system
- with useful bottom detection down to ~8 meters and sea-truth comparison .
Much less clear waters, Atlantic coast of France.

Caicos TM

Then go for a 4-bands Landsat TM image
The clear coral reef waters of Bahamas with negative bottom contrast
With excellent sea-truth comparison.

Negril TM

Then try a low-light image,
- with extensive seaweed beds and some interesting sea-truth .
Clear coral reef waters of Jamaica.

Further your training
(for a price if/when I get organized for that)
big and real life images, complete with 4SM executable code, command line, and ancillary files

TM ETM IKONOS CASI

for 16U images (Ikonos and CASI) the raw data channels are void, for sake of copyright.
If you hold the image, then you can import the 16U data and run a full processing.
For TM and ETM images, the raw data is included.

Then what: any license?

All functionalities are enabled in 4SM executable,
but modeling is limited to a small sub-window
or result channels are chequered
unless your image is square and small enough
or its licensekey is included in 4SM.
This means that you can run your calibration,
and sea truth evaluation using the RegressZZ module,
ahead of any actual modeling of your image.
Then if/when satisfied with your Calibration and Command Line,
you shall have to purchase some kind of license for full modeling of your image.