e2E has developed a set of software tools for large operators and service providers, primarily in the areas of communications systems analysis and satellite systems planning:

  • Common Link Budget Tool
  • Advanced Link Budget Tool
  • BIOMASS Radio Frequency Interference Simulator (RFIS)
  • Earth Station Pointing Tool
  • Adjacent Satellite Interference
  • Next Generation Processor Benefits
  • Capacity Analysis Tool

Common Link Budget Tool (CLBT)

CLBT is a detailed link planning tool which has now been rolled out globally, with over 100 users; a Lite version is distributed to customers.

CLBT was developed to:

  • Reduce the time required to sign capacity leasing contracts
  • Reduce the time Sales Engineers required to complete detailed link analyses
  • Ensure consistency of input data and that it is up to date (i.e. spacecraft configuration)
  • Ensure that regulatory and coordination constraints are met

CLBT has a wide User base:

  • Sales Engineering – used for detailed link budget analysis on single or multiple links
  • Capacity Management – used to manage transponder resources and to determine operational configurations
  • Frequency Management – used in the negotiation of intra-system and inter-system coordination negotiations
  • Payload Operations – used as a basis to line-up services and to support service anomaly investigations.

The key features are:

  • Satellite configurations imported from database
  • Support for reconfiguring satellites, given set of connectivity constraints
  • Analysis Options – Power/Bandwidth required, Service Availability, Antenna size, Transponder Gain setting, Data Rates
  • ITU Propagation model for calculation of rain margins and availabilities
  • DVB-S2 Support
  • Analysis of simplex, duplex, broadcast, hub-spoke, TDMA topologies
  • Calculates required earth station HPA size
  • Support for Paired carrier operation
  • Standalone version is distributed to customers (>100 users).

Advanced Link Budget Tool (ALBT)

ALBT is an analytical tool providing system capacity analysis. It has been originally developed to support the development of a satellite system business case, to model end-to-end system Gateways, payload and User terminals and in order to perform geographical link budget analysis.

Its functionality has been further extended to allow Sales Engineers to run link budget analyses for Customers, to allow resource engineers to determine channel configurations and associated operating points and to provide a tool to allow engineers to model new spacecraft. ALBT calculates overall throughput statistics:
  • Able to generate randomly distributed terminal locations within coverage area
  • Can analyse a complex payloads determining frequency plans and channel performance
  • Payload diagram allows configuration of equipment and switches 

ALBT’s key features are:

  • Payload block diagram enables configuration of on board switching
  • Analysis of availability and throughput
  • ITU propagation model including rain, cloud, scintillation, de-polarisation
  • Intra-system interference calculation
  • Dynamic calculation of satellite connectivity and frequency plan based on switch, downconverter and filter settings
  • Support for user generation of new satellites
  • 3D world map for displaying coverage, analysis results, terminal locations and service areas
  • Analysis of simplex, duplex, broadcast and multiple hub topologies
  • Generation of terminal cells based on optimum EIRP or G/T performance
  • Phase noise analysis
  • Use of TWTA characteristics for IBO/OBO curves


BIOMASS Radio Frequency Interference Simulator (RFIS)



BIOMASS is a software tool delivered to ESA as part of the BIOMASS Phase A Study. It determines the bi-directional interference effects between ground based systems and an Earth observation satellite operating at P-band, performs time simulation over the satellite’s orbit (LEO), the RFIS is used to determine payload design and operational constraints and the European Space Agency is using RFIS in ongoing negotiations with the US DoD. 

Key features:

  • 3D World map view can display beam plots, orbital paths, terminal locations and analysis results
  • Internal 6 element Keplerian orbital model
  • Can import orbital paths from external tools
  • Models interference levels at satellite receiver and ground terminal receiver
  • Conforms to ITU 1260-1 "Feasibility of sharing between active space borne sensors and other services in the range 420-470 MHz.”
  • Generates charts and reports of interference levels over time.

Earth Station Pointing Tool

Key features:

  • Calculates satellite location and earth station pointing angles based on 11 element ephemeris
  • Can download ephemeris files from websites
  • Support for multiple collocated satellites
  • Generates reports for optimum pointing times
  • Generates charts for pointing angles and satellite locations.

Adjacent Satellite Interference

Key features:

  • Calculation of adjacent satellite interference according to ITU recommendation
  • Involves polarisation and gain definitions
  • Text based output can be imported into spreadsheet.

Next Generation Processor Benefits Analysis

Key features:

  • Quantifies benefits of NG processors based on traffic model assumptions
  • Dynamically assigns offered traffic to channels given a set of connectivity constraints.
  • Displays simulation results on charts and channel plans
  • Can model conventional, flexible and NG payloads.

Capacity Analysis Tool

Key features:

  • 3D World map view can display beam coverages
  • Can model conventional and processed payloads
  • Can generate terminal locations within country and/or beam coverage bounds
  • Can run large scenarios containing 100s of terminals
  • Power and bandwidth plots generated
  • Analysis includes ITU propagation model, intra-system interference, coordination constraints.