Arctic Surveillance and the Building Blocks of Constellations

GOMX-4 is a research and development mission by GomSpace. It includes 2 satellites and 3 partners: The Danish Defence Acquisition and Logistics Organization (DALO), the Technical University of Denmark and the European Space Agency (ESA).

GOMX-4A is sponsored by DALO who by this mission will have their first satellite intended to contribute to surveilance of the Artic.  The GOMX-4A demonstration is part of an analysis seeking to identify best-practice and future efforts reinforcing the Danish Defense’s surveillance of the Artic within the Kingdom. The satellite has been named ”Ulloriaq” after the word ”star” in the Greenlandic language. 

"Ulloriaq" will be launched together with another satellite GOMX-4B, which is an ESA satellite. GOMX-4B has the mission to demonstrate inter-satellite linking and station keeping capabilities; key enabling technologies for future nanosatellite constellations. 

Tandem Mission of the 2x6Us
  • Sponsored by the Danish Defense and ESA
  • PDR completed, launch in Q3 2017

The satellites will be 6U satellites, small in size, with dimensions of 20x30x10 cm and weight of approximately 8 kilograms each. The two satellites will be launched together on February 1st 2018. 


  • Inter-satellite linking
  • Station keeping
  • Hyperspectral imaging
  • ADS-B and AIS receivers


GomSpace is the project prime responsible for the satellite platform, the inter-satellite linking radio communication subsystem and integration of partner contributions 


“The GOMX-4B satellite is the most advanced satellite design we have initiated to date and we are very happy that ESA will participate in this project that will demonstrate possibilities of satellites flying in formation, assess the tandem effect synergy that open the doors to commercial opportunities for using the platform in future constellations for our customers. We are very happy to work with ESA and together take the nanosatellite technology to a new level” 

“”We look forward to working closely with DALO and DTU on this exciting project and jointly develop and demonstrate the Ulloriaq mission. Our satellite and radio technologies are a perfect match for monitoring the vast and remote arctic area with the satellite flying over the scene every 90 minutes” 

Niels Buus, CEO from GomSpace

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