Testbed for SatCom on the Move

FORTE SatCom on the Move (SOTM)

Key Features of the Far Field SOTM Testbed at a Glance


  • Antenna pattern
  • Positioning, Acquisition, and Tracking (PAT) performance
  • Residual off-axis emissions
  • Forward/Return link performance
  • End-to-end link performance
  • Fading of the LMS channel including satellite signal impairments
  • Mechanical movement of the terminal platform
  • Realistic GPS/Galileo HF signal over the air (arbitrary tracks possible)
  • Interference from satellites in adjacent positions

Suited for:

  • Ku-Band (12/14 GHz) or Ka-Band (20/30 GHz)
  • Dual-linear or dual-circular polarization


Device under Test
© Fraunhofer IIS/Christoph Gorke

Advantages of the testbed:

  • Higher accuracy of depointing measurements compared to satellite to terminal
  • Precise depointing measurement in azimuth and elevation
  • Cost-efficient and available all the time
  • Far field radiation pattern measurements
  • Weather independent

Our service offer:

  • EUTELSAT SOTM type approval including pattern measurement for ESOG 120
  • GVF type approval measurements for e.g. GVF 101, GVF 104, GVF 105 as an ATE (Authorized Test Entity)
  • Consulting for SOTM systems
  • SOTM system integration (e.g. mobile satellite backhaul solutions in conjunction with a mobile LTE femto cell)

More Information

Reference EPAK GmbH

SOTM testing for marine satellite antenna

The EPAK DSi6 internet antenna for maritime applications has been tested at FORTE.



  • Tests according to the GVF recommendations (GVF-105) and the type approval specifications of EUTELSAT (EESS-502 and ESOG-120)
  • Tracking performance approved on hardest maritime motion profile "Class A" developed by Fraunhofer IIS


Technical Paper

Standardized testing conditions for SOTM terminals

Alazab Elkhouly M, König J, Beuster N, et al.

Technical Paper

Pointing accuracy evaluation of SOTM terminals under realistic conditions

M. Alazab, W. Felber, G. D. Galdo, A. Heuberger, M. Lorenz, M. Mehnert, F. Raschke, G. Siegert, and M. Landmann

Technical Paper

SOTM terminals evaluation under realistic conditions

M. Alazab, G. Del Galdo, W. Felber, Albert Heuberger, M. Lorenz, F. Raschke, G. Siegert, M. Landmann

Technical Paper

Image-based state modeling of the land mobile satellite channel for multi-satellite reception

M. Rieche, D. Arndt, A. Ihlow, M. Landmann, and G. D. Galdo

Technical Paper

State modeling of the land mobile satellite channel via an image-based approach

M. Rieche, D. Arndt, A. Ihlow and G. Del Galdo

Technical Paper

Measurements of mechanical disturbances of vehicle mounted, mobile very small aperture terminals (VSAT)

M. Lorenz, M. Mehnert, and A. Heuberger