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Weak GNSS Signal Navigation on the Moon

The initial step of the analysis is represented by the definition of the GNSS capabilities and receiver requirements in the environment of interest. The service volume concept has been introduced to this aim, and recent studies pointed out the interest to define and include GNSS performance above the altitude of the constellation itself [1], [2]. It is well known that signals, even if primarily broadcast from GNSS sources in order to serve Earth surface and proximity (i.e. with a beam directed nadir), are available at a limited extent also above the constellation.

Austria

043-3

Joanneum Research
BOdies UNder Connected Elastic Dynamics (BOUNCED)

The BOUNCED project has assessed the behaviour of elastic tethers within flexible link Active Debris Removal (ADR) systems. This has been achieved by solving a multidimensional set of linear equations, through the separation of dynamic modes; and the construction of analytic and numeric models of the resulting system. These models can be used to simulate the behaviour of both single and multi material tethers across the full lifetime of a tether mission, from pretension, through re-entry burn and free body motion post burn, to re-entry.

UK

13-090

Belstead Research Ltd.

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