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Assessment of Satellite Constellations for Monitoring the Variations in Earth Gravity Field “SC4MGV”

The overall objective of this study is to assess constellations of two pairs of satellites for the retrieval of time-variable gravity field information for best quality scientific monitoring of mass distribution and transport in the Earth system. Before embarking on this study the geodetic community and space agencies have come to realize that weaknesses in current single-pair gravimetric satellite missions such as GRACE or GRACE-FO (to be launched in 2017) would significantly be alleviated by having a second GRACE-type pair in space simultaneously.

Germany

12.708

UNIV STUTTGART
Plasma induced antenna noise spectroscopy for Space Weather monitoring

Ambient space plasma can induce electrostatic noise in a linear antenna onboard a spacecraft. The resulting quasi-thermal noise (QTN) intensity spectrum as a function of frequency depends on the plasma parameters. The phenomenon can be utilised for inferring the plasma parameters if one measures the induced noise by a sensitive radio receiver. This is called QTN spectroscopy and it has been demonstrated and validated in several space missions that the technique is able to uncover the correct plasma parameters.

Finland

12-138

Finnish Meteorological...
Weak GNSS Signal Navigation on the Moon

Global Navigation Satellite Systems (GNSS) are already used in space missions (e.g. GOCE, Swarm, Sentinel, and MetOp, among others), not only as a navigation sensor (either for autonomous orbit and attitude determination or for relative navigation) but also as a science instrument (e.g. for altimetry, global geodesy, Radio Occultation and GNSS Reflectometry applications). However, its use is usually limited to orbits or mission phases below the orbits of GNSS satellites, since GNSS satellite antennas transmit mainly in the Earth's direction.

Portugal

13-071

Deimos
OPS-Sat Phase A/B1

In conclusion this Phase A-B1 study contract has provided:
• Confirmation that the mission concept described in phase 0 is feasible and relevant
• Consolidation of mission objectives and mission requirements
• An updated mission architecture and system design solving many of the problem areas identified in Phase 0
• A roadmap for distribution of relevant documentation and tools to experimenters throughout the project

Denmark

2013-19

Gomspace APS

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