4. Software Installation

4.1. Overview

This chapter describes the overall S3-SNOW software installation procedure.

4.2. Usage Requirements

4.2.1. General Requirements

In general, all S3-SNOW processors require SNAP in the latest snapshot version (v7.0.0-SNAPSHOT), which comes with the S3-SNOW software delivery for all platforms (Windows, Linux, MacOS). [1]

Footnotes

[1]This snapshot version can be replaced by the next official release (v7.0.0) when available. This will be announced on the SNAP website.

4.2.2. Operating System

The S3-SNOW software can be run on any operating system which is suppported by SNAP (Windows, Linux, MacOS).

4.2.3. Hardware Requirements

The S3-SNOW processing system is a complex piece of software. Although the algorithms for the snow properties retrieval are mostly relatively simple, the effort for data input/output is fairly high in case of full resolution OLCI products. Therefore, up-to-date and sufficiently powerful and dimensioned hardware is strongly recommended for reliable and convenient processing.

4.3. Contents of the Processing Software Bundle

The S3-SNOW processing software consists of the following components:

  • snap-core module: part of the SNAP installation package
  • snap-gpf module: part of the SNAP installation package
  • s3tbx-idepix-olci: nbm plugin file
  • s3tbx-olci-o2corr: nbm plugin file
  • s3tbx-snow: nbm plugin file
  • snap-slope: nbm plugin file
  • GIMP Digital Elevation Model for Greenland: GeoTIFF auxiliary file

See listing of files in Figure 4.1.

_images/sw_bundle.png

Figure 4.1 Contents of the S3-SNOW software bundle.

The processor versions were frequently incremented during the iterative development process. E.g., the current version of the Snow Properties Processor at S3-Snow project end is v2.1.

4.4. How to get the Software

The S3-SNOW processing software bundle can be obtained from the S3-SNOW ftp site hosted at BC with the following configuration:

  • FTP, Port 21
  • ftp.brockmann-consult.de
  • username: s3snow
  • password: $3Sn0W@bc
  • subdirectory: software

4.5. Installation Steps

4.5.1. Installation of the SNAP Software

Download SNAP (Unix version) from the SNAP web site [4] and follow the information and instructions for installation given there.

4.5.2. Installation of the S3-SNOW Processor modules

Once SNAP has been installed, the installation of all NBM plugin files needs to be done from the ‘Plugins’ toolwindow in the SNAP Desktop application. This is illustrated in the figure sequence Figure 4.2 to Figure 4.5.

_images/plugins_in_tools_menu.png

Figure 4.2 The SNAP menu entry for installation of plugins.

_images/add_plugins.png

Figure 4.3 Selection of plugins to be installed.

_images/add_plugins_confirm.png

Figure 4.4 Confirmation of selected plugins (step 1 of 4).

_images/add_plugins_confirm_restart.png

Figure 4.5 Final confirmation for restart after selection of plugins.

After restart of SNAP, the installed processors will be available from their dedicated menu entries. This will be shown in more detail in the next chapter.