The SISNeT User Interface Document (UID) is the principal guide for developers wishing to create new SISNeT applications. The document flows from a high-level to low-level technical detail.

The document comprises:

• a high-level description of the SISNeT platform and the SISNeT applications developed by ESA
• the fundamentals of SISNeT-based application development
• technical details for SISNeT application developers (e.g. DS2DC protocol, decompression algorithms, etc.)
• appendices with a comprehensive DS2DC protocol reference and a list of error codes