Architecture for a Combined DORIS-GNSS Receiver

Christian Jayles (CNES, France)

Event: 2018 IDS Workshop

Session: SESSION IV: Research activities and new applications

Presentation type: Type Oral

Precise Orbit Determination (POD) missions frequently use both DORIS and GNSS measurements made by two different receivers using different time generators. These systems are very accurate, but also very expensive, and have heavy mass-consumption-volume (MCV) requirements.

A deep re-conception of DORIS receivers becomes useful, taking into account recent years evolutions of on-board technologies (electronics, GNSS technologies, ...). New RF and NUM components are now available, designed for on-board applications and conceived to implement a wide set of functionnalities, using Software Define Radio (SDR) solutions. These components and SDR solutions have already been studied in details, suggesting their possible use for such a GNSS / DORIS receiver. Nevertheless, such a POD receiver needs to be carefully examined wrt accuracy specifications as well as MCV and costs requirements, in order to define optimal hardware and software architectures based on these new components and SDR technologies.

This study aims at defining an architecture for a receiver using both DORIS and GNSS signals, based on SDR and presenting a MCV and cost significantly reduced with respect to current DORIS or POD GNSS receivers. The goals are many :
- study the feasibility for DORIS or GNSS receivers, parts or total,
- evaluate the complexity of integrated functions, potentially common to both DORIS and GNSS receivers,
- identify the possible impact on performances of such an implementation,
- quantify the improvements in terms of mass-consumption-volume and cost (prototype or series),
- in a second phase, if feasibility is shown, realise a prototype of critical functions.

Main goals for such a receiver are :
- significantly reduce the cost of such a system, in order to allow access to new missions,
- reduce MCV requirements in order to facilitate integration on space platforms.

For the future, GNSS and DORIS systems are complementary and their association in real-time processing should improve the efficiency of independant solution (initialisation delays, observability, reduction of error sources, ...)

Oral presentation show times:

Room Start Date End Date
Lagoa Do Fogo Tue, Sep 25 2018,16:50 Tue, Sep 25 2018,17:10
Christian Jayles