New COTS GNSS for CubeSats

Space grade GNSS receivers, with varying degrees of functionality have been available on the micro and small satellite market for several years – demanded for their ability to help small satellites fly in precise formation.

As these small satellites are used more and more for in-orbit demonstration they are being used in experimental missions, testing for close orbital manoeuvres, for collision avoidance, safety procedures and even docking. All technologies that, once working, could open possibilities for deorbiting, in orbit servicing and more. 

The increase in the number of missions requiring such precise position, velocity and timing determination, along with the decrease in the size of these missions has led to more  demands for smaller, cheaper and higher performing GNSS receivers for space.

A new activity with GSTP Element 1 and Romanian InSpace Engineering (RISE),  has developed a GNSS receiver based on COTS components that can achieve positioning accuracy to less than 10 cm without trading a loss in robustness.

Called OrbFIX, this GNSS receiver for space can produce  high positioning precision in the vital low volume, mass and power consumption required for small satellites. At the same time, it is being produced for low cost, making it affordable despite its advanced technology.

After successfully concluding the Preliminary Design Review, the very promising receiver was tested to withstand radiation, in a thermal-vacuum chamber, in a stratospheric balloon and in a GNSS simulator, replicating operations in a Low-Earth Orbit.

Algorithms for low power, artificial neural networks –based positioning and for precise point positioning modes have also been developed and integrated.

Next, the OrbFIX receiver will be developed up to TRL 8, going through critical design, testing and qualification procedures.

G617-241TAdc closed in January 2021