The capacity of instruments has been increased with the miniaturization of MVR receivers.

The 2^nd generation MVR receivers have two receiving channels against only one channel previously, which increase their accuracy by doing simultaneous measurements on two different ground beacons. Current instruments nammed DGXX improve their autonomy, their robustness against radiations and the system accuracy.

The miniaturization of Doris receivers onboard satellites has been divided by two for Envisat (2^nd generation 2G) and four for Jason-1 and Spot5 (2^nd generation miniaturized, 2GM).

The DGXX instrument contains only a single case with two receivers and two Ultra Stable Oscillators (USO) and twice seven processing units with dual-frequencies in internal redundancy, the equivalent of 14 instruments of the 1^st Doris generation.

The next generation, named DGXX-S, is under development for Sentinel-3 et Jason-3 (and then for Jason-CS et Swot). These instruments will have the same functions as DGXX instruments. A new processor (LEON) will allow new processing capacities on board with benefits on: real time orbit determination (toward centimetric accuracy), Earth pole determination (< 1 mas), beacons frequencey estimation (<10e^-12)...

On the ground station network, Cnes developed third-generation beacons to improve Doris system accuracy and capacity. The emitted frequencies can now be shifted with respect to the nominal frequencies: ± 50 kHz (2 036.25 MHz) and ± 10 kHz (401.25 MHz). It will thus be easier to avoid jamming by nearby stations.