The European Space Software Repository (ESSR) is an ESA informational web portal created to promote reuse of Software - including Open Source Software (OSS) - and to provide all parties involved in the European Space software development (in particular SMEs) with access to results of previous investments.
Please click here to register and get full access to the ESSR.
Only a limited number of projects is visible to the non-registered users.
Registration is available for everyone residing in an ESA member state.

available projects

Multipactor Tool version 2.0.0

The key functionalities of the ECSS Multipactor Tool version 2.0.0 is the evaluation of the Multipactor risk on RF systems in single and multicarrier modes accordin...

Updated on: 06/10/2021
Created on: 30/09/2021
RTEMS SMP QDP (Qualification Data Package)

A prequalification toolkit allows end-users to qualify their space applications on bespoke (space-qualified) hardware. The primary focus has been on qualifying the ...

Updated on: 28/05/2021
Created on: 28/05/2021
opus (PUS-C Tooling)

The opus toolset, previously known as PUS-C-Gen allows to work with the PUS-C Standard, in particular: - Instantiate and tailor the standard for a new mission - C...

Updated on: 20/01/2021
Created on: 20/01/2021
Version Control System: git
Owner: ESA
SSAT (Sector Shielding Analysis Tool)

The Sector Shielding Analysis Tool (SSAT) performs ray-tracing from a user-defined point within a given Geant4 geometry to determine shielding profiles (i.e. the fr...

Updated on: 02/11/2020
Created on: 02/11/2020
Open Source Software Resources for Space Downstream Applications

This webpage provides a list of open source software resources for developing space downstream applications, in the following categories: Positioning & Navigat...

Updated on: 19/10/2020
Created on: 11/06/2020
RATIO-SIM (Rationalisation of Simulators)

  The specification, design and verification of modern space systems rely heavily on the use of system modelling and simulation, in support of the space systems e...

Updated on: 10/09/2020
Created on: 21/04/2020
MB4SE (Model Based For System Engineering)

Space industry and Agencies have recognized already for quite some time the interest and added value of Model-Based System Engineering (MBSE) in streamlining the de...

Updated on: 30/04/2021
Created on: 10/04/2020
Unified GNSS Ionosphere

ESA UGI is an open source program package that allows the computation of the vTEC from GNSS observables. The aim is to give to the ionospheric community a starting ...

Updated on: 02/11/2020
Created on: 08/04/2020
Version Control System: git
Owner: ESA
GAFE - Generic AOCS/GNC Techniques & Design Framework for FDIR

GAFE is the abbreviation for "Generic AOCS/GNC Techniques & Design Framework for Failure Detection, Isolation and Recovery" and the name of the framework develo...

Updated on: 04/11/2019
Created on: 01/11/2019
Owner: ESA

MULASSIS is a Geant4-based M-C simulation based tool for dose and particle fluence analysis associated with the use of radiation shields. Users can define the shiel...

Updated on: 12/10/2021
Created on: 07/06/2019